| 0 | PI 691542 | Ames 33905 | Juglans microcarpa Berland. | Kansas, United States | | | Historic | 2017 | | | | | | | Wild material | | 1946801 | PI 691542 |
| 1 | PI 691543 | Ames 33906 | Juglans microcarpa Berland. | Kansas, United States | | | Historic | 2017 | | | | | | | Wild material | | 1946802 | PI 691543 |
| 2 | PI 658641 | JM2004016 | Aronia arbutifolia (L.) Pers. | South Carolina, United States | NC7 |  | | 2004 | COLLECTED | 10/06/2004 | Poe Creek outcrop, State Forest, Pickens County. | 34.92856600, -82.86763300 | 314 | Granite flatrock/glade community. Above seepage fen hummock on edge of rock outcrop. 10 degrees of slope. Fen/bog. | Wild material | Accession has good vigor with very open growth and minimal suckering. Specimens at original collection site in nature measured up to 10 feet tall. | 1667569 | PI 658641 |
| 3 | PI 603126 | KFBX 36 | Spiraea fritschiana C. K. Schneid. | Gangwon-do, Korea, South | NC7 | | | 1996 | COLLECTED | 09/28/1989 | Inje borough. Track to Paekdamsa Temple. Sorak-san National Park. | 38.06666667, 128.16666667 | 440 | Coarse granitic soil. On unstable hillside above river in full sun beyond forest edge. | Wild material | | 1517408 | PI 603126 |
| 4 | PI 635959 | S. alnifolia - Estonia | Micromeles alnifolia (Siebold & Zucc.) Koehne | Estonia | COR |  | | 1996 | COLLECTED | | | | | | Cultivated material | | 1522057 | PI 635959 |
| 5 | PI 613035 | NA 64519 | Spiraea trilobata L. | Beijing Shi, China | NC7 | | | 1995 | COLLECTED | 09/14/1994 | Yong Xiu Gou, (Valley with Beautiful Clouds), Wuling Shan Preserve, Miyun County. | 40.61305556, 117.38166667 | 635 | Growing in rocks near the stream. | Wild material | Deciduous, multi-stemmed shrub with upright billowing habit. 2 meters tall and 3 to 4 meters wide. Older stems gray and one year old stems light brown to amber. Blue green foliage above, light green on the undersurface. Some late season foliar damage. | 1484028 | PI 613035 |
| 6 | PI 662023 | Ames 21900 | Flueggea suffruticosa (Pall.) Baill. | North Dakota, United States | NC7 | | | 1994 | COLLECTED | PRE 02/1994 | McKenzie Game Management Area, near Bismarck. | | | | Cultivated material | | 1087301 | PI 662023 |
| 7 | PI 618710 | 348-93 | Flueggea suffruticosa (Pall.) Baill. | Heilongjiang Sheng, China | NC7 | | | 1993 | COLLECTED | 09/13/1993 | Jiang Po Lake, Jian Shan Jiao. | 43.86361111, 128.91333333 | 340 | Scrub community on rocky cliff above Jiang Po Lake. In association with Quercus mongolica and Prunus mandshurica. | Wild material | Subshrub. Plant height 1 meter. Fruit green, round. | 1087156 | PI 618710 |
| 8 | PI 635909 | KSW 3633 | Micromeles alnifolia (Siebold & Zucc.) Koehne | Jeollanam-do, Korea, South | COR |  | | 1989 | COLLECTED | 09/23/1985 | Jeollanam-do, Sinan-gun, Heuksan-myeon, Taehuksando-hang, Ye-ri, Chukhang-ri Village | 34.66351600, 125.43497800 | 100 | Among boulders on northwest-facing slope on cut-over hillside overlooking ocean. | Wild material | Colonial deciduous shrub forming an extensive nearly pure colony ca 1 m tall; lvs. medium green, lustrous, turning | 1002764 | PI 635909 |
| 9 | PI 635928 | Ames 7606 | Micromeles alnifolia (Siebold & Zucc.) Koehne | | COR |  | | 1987 | | | | | | | Cultivated material | Minnesota Landscape Arboretum Seed Exchange. Medium-sized, deciduous tree. | 1003910 | PI 635928 |
| 10 | PI 502252 | 'St. Oedenrode' | Salix alba L. | Netherlands | NC7 |  | | 1985 | COLLECTED | | | | | | Cultivar | Timber, windbreak, or biomass type. Plants to 20m tall. | 1397188 | PI 502252 |
| 11 | PI 495614 | 9 | Quercus muehlenbergii Engelm. | Missouri, United States | NA | | Not Available | 1984 | COLLECTED | 09/22/1984 | Along ridge of south boundary road, Monkey Mountain Wildlife Management Area, Section 24, T59N, R37W, Holt County. | 39.91040000, -95.00470000 | 282 | South-facing slope. Associated with Carya ovata, Juniperus virginiana, Quercus macrocarpa, Q. rubra, redbud, Rhus, Triosteum, Ulmus, and miscellaneous forbes and grasses. | Wild material | Plants to 6 meters tall. | 1390550 | PI 495614 |
| 12 | PI 343437 | NA 77129 | Populus alba L. | Kyonggi, Korea, South | NA | | Not Available | 1969 | DONATED | 04/01/1969 | | | | | Uncertain improvement status | | 1667755 | PI 343437 |
| 13 | Ames 36258 | North Beark Creek WMA | Acer spicatum Lam. | Iowa, United States | | | Historic | 2024 | COLLECTED | 09/22/2022 | North Bear Creek Wildlife Management Area along South Bear Creek just 1.8 miles east of Highlandville, T100N R7W NE ¼ Sec. 35. | 43.43762000, -91.63512800 | 266 | Mixed hardwood forest. Very steep, mooist, northwest-facing slope. | Wild material | Native to the northeastern U.S. and Canada, this small, understory shrub is often found in cool, wet woods. At the southern edges of its native range, the species typically is restricted to north-facing slopes and/or algific talus. Clonal thickets can develop over time as shoots tend to easily root when in contact with moist soil. This species is known to be very shade tolerant and also short-lived unless coppiced semi-frequently. The specific epithet spicatum refers to the “spiked” inflorescences. Spring flowers are white to pale yellow erect panicles that can reach close to 10 cm in length. Significant ornamental attributes include samaras that can be vibrant red in color followed by outstanding autumnal leaf colors ranging from yellow to orange to red. While significant pruning and training can result in a single-trunked specimen, new sprouts/stems will frequently be produced thus the more aptly applied term of “shrub” to this species. The genetics of this accession are from the extreme western edge of the species native range. | 2168781 | Ames 36258 |
| 14 | Ames 36225 | Bolu-Aladag | Abies nordmanniana (Steven) Spach subsp. equi-trojani (Asch. & Sint. ex Boiss.) Coode & Cullen | Bolu, Turkey | NC7 | | Not Available | 2024 | COLLECTED | | Aladağ Mountains near Bolu | 40.62091400, 31.59314700 | | | Cultivated material | Evergreen conifer with potential to reach 30 m in height. Typically straight trunked with a pyramidal crown that flattens with age. Increasing in use in the USA for Christmas tree production, but also popular as landscape, specimen trees. Known to tolerate high soil temps, low elevations, and adapted to warm and dry climates along with some resistance to Phytophthora root rot. Many studies refer to A. equi-trojani and A. bornmuelleriana separately, where A. equi-trojani covers the westernmost range found localized on the Kazdağı Mountain (Mount Ida) in northwestern Turkey and where A. bornmuelleriana ranges south from the Black Sea in the Köroğlu, Ilgaz, and Küre Mountains typically found in elevations ranging from 1024-1690 m. Despite the debate on the botanical relationship of these, Turkish (A. bornmuelleriana), Nordmann (A. nordmanniana), and Trojan (A. equi-trojani) are morphologically difficult to separate. Needle form on A. bornmuelleriana tends to be finer and more like a bottlebrush relative to the more flatter needles and flatter needle tips on A. nordmanniana (Landgren 2016). Compared to A. equi-trojani, A. bornmuelleriana has longer and wider needles and also wider cone and higher cone width/length ratio (Kurt et al., 2016). Current (2023) taxonomic classification lists both Turkish fir, A. bornmuelleriana, and Trojan fir, A. equi-trojani, under A. nordmanniana subsp. equi-trojani. This accession, Bolu-Aladag, is the result of germplasm originating from the Aladag Mountain range within the Bolu Province, Turkey. | 2166222 | Ames 36225 |
| 15 | Ames 36138 | Muscatatuck NWR | Populus heterophylla L. | Indiana, United States | NC7 |  | | 2023 | COLLECTED | 05/30/2023 | Muscatatuck National Wildlife Refuge located 4.37 miles east, southeast of Seymour, T6N R6E SW 1/4 Sec. 24 | 38.94292000, -85.81076600 | 159 | Edge of stagnant swamp along road. Soils rather mucky/heavy clay. | Wild material | Native to North America, this deciduous tree has a native range that covers the Atlantic coastal plain concentrated in the Carolinas and also along the Mississippi and Ohio Rivers along with various, tiny disjunct populations widely scattered across the southeast U.S. (Little, 1971). As an obligate wetland plant, the soils that this species inhabits is typically heavy clay (ranging 24 to 65%) and slightly acidic (soil pH ranges from 4.6 to 5.9) (Johnson 1990). Typical habitat is bottomlands/floodplains that generally have standing, shallow water. Sites that are often too wet for P. deltoides are suitable for P. heterophylla. Swamp Cottonwood can reach 10-20 meters in height and generally has an upright, rounded form. Broadly ovate leaves are rather large reaching up to 25 cm in length and nearly 15 cm wide with abaxial surfaces usually pubescent to partially glabrate. As with many other species in Salicaceae, P. heterophylla is dioecious with staminate and pistillate catkins appearing in early spring and reaching up to 10 and 15 cm in length, respectively. Seeds are dispersed in spring through early summer. Swamp Cottonwood is distinguishable from other Populus largely due to the distinctly cordate leaf bases and distinctive orange-brown pith in young twigs (McMaster 2003). Ornamental characteristics include golden yellow fall color. This taxon is essentially non-existent in the nursery trade and extremely rare in botanical garden and arboretum collections. Due to this species ability to grow in anaerobic, soils heavy in clay, this species may perform well in the typical urban landscape. Its potential to withstand extreme, drought despite being an obligate wetland plant may be similar to that found in Taxodium distichum. Genetics of this accession were collected in southern Indiana. Specimens sampled in nature were approximately 40-50' in height and were clonally (vegetative) spreading by rhizomes. | 2158343 | Ames 36138 |
| 16 | Ames 35992 | Bolu-Kökez Select | Abies nordmanniana (Steven) Spach subsp. equi-trojani (Asch. & Sint. ex Boiss.) Coode & Cullen | Bolu, Turkey | NC7 | | Not Available | 2023 | COLLECTED | | Bolu-Kökez in Turkey. | 40.66609200, 31.64905700 | | | Cultivated material | Evergreen conifer with potential to reach 30 m in height. Typically straight trunked with a pyramidal crown that flattens with age. Increasing in use in the USA for Christmas tree production, but also popular as landscape, specimen trees. Known to tolerate high soil temps, low elevations, and adapted to warm and dry climates along with some resistance to Phytophthora root rot. Many studies refer to A. equi-trojani and A. bornmuelleriana separately, where A. equi-trojani covers the westernmost range found localized on the Kazdağı Mountain (Mount Ida) in northwestern Turkey and where A. bornmuelleriana ranges south from the Black Sea in the Köroğlu, Ilgaz, and Küre Mountains typically found in elevations ranging from 1024-1690 m. Despite the debate on the botanical relationship of these, Turkish (A. bornmuelleriana), Nordmann (A. nordmanniana), and Trojan (A. equi-trojani) are morphologically difficult to separate. Needle form on A. bornmuelleriana tends to be finer and more like a bottlebrush relative to the more flatter needles and flatter needle tips on A. nordmanniana (Landgren 2016). Compared to A. equi-trojani, A. bornmuelleriana has longer and wider needles and also wider cone and higher cone width/length ratio (Kurt et al., 2016). Current (2023) taxonomic classification lists both Turkish fir, A. bornmuelleriana, and Trojan fir, A. equi-trojani, under A. nordmanniana subsp. equi-trojani. This accession, Bolu-Kökez Select, is the result of germplasm harvested from an orchard in Denmark (Wedellsborg Estate) from trees selected for late bud break and fast growth. The original germplasm for the Wedellsborg Estate orchard was collected in the Bolu-Kökez region of Turkey. | 2141266 | Ames 35992 |
| 17 | Ames 35993 | Kongsøre FP 267 | Abies nordmanniana (Steven) Spach subsp. equi-trojani (Asch. & Sint. ex Boiss.) Coode & Cullen | Bolu, Turkey | NC7 | | Not Available | 2023 | COLLECTED | | Bolu-Kökez in Turkey. | 40.66132700, 31.64589200 | | | Cultivated material | Evergreen conifer with potential to reach 30 m in height. Typically straight trunked with a pyramidal crown that flattens with age. Increasing in use in the USA for Christmas tree production, but also popular as landscape, specimen trees. Known to tolerate high soil temps, low elevations, and adapted to warm and dry climates along with some resistance to Phytophthora root rot. Many studies refer to A. equi-trojani and A. bornmuelleriana separately, where A. equi-trojani covers the westernmost range found localized on the Kazdağı Mountain (Mount Ida) in northwestern Turkey and where A. bornmuelleriana ranges south from the Black Sea in the Köroğlu, Ilgaz, and Küre Mountains typically found in elevations ranging from 1024-1690 m. Despite the debate on the botanical relationship of these, Turkish (A. bornmuelleriana), Nordmann (A. nordmanniana), and Trojan (A. equi-trojani) are morphologically difficult to separate. Needle form on A. bornmuelleriana tends to be finer and more like a bottlebrush relative to the more flatter needles and flatter needle tips on A. nordmanniana (Landgren 2016). Compared to A. equi-trojani, A. bornmuelleriana has longer and wider needles and also wider cone and higher cone width/length ratio (Kurt et al., 2016). Current (2023) taxonomic classification lists both Turkish fir, A. bornmuelleriana, and Trojan fir, A. equi-trojani, under A. nordmanniana subsp. equi-trojani. This accession, Kongsøre FP 267, is the result of germplasm acquired from an orchard planted in 1987 in Denmark (Wedellsborg Estate) that encompassed trees (80 plus out of some 13,000) selected for desirable Christmas tree type characteristics including late flushing, vitality, slim shape, symmetry, and many internodial branches and buds. The original germplasm for the Wedellsborg Estate orchard was collected in the Bolu-Kökez region of Turkey. | 2141267 | Ames 35993 |
| 18 | WLP 2702 | AS/CL/2022/057/187 | Chilopsis linearis (Cav.) Sweet | New Mexico, United States | NA |  | | 2022 | COLLECTED | 09/05/2022 | Gila National Forest, in wide valley with Gila River floodplain. Along Bill Evans Road, starting approximately 1.15 miles from the end of road. T17S R17W SE 1/4 NW 1/4 Sec. 17. | 32.82946700, -108.60469600 | 1322 | Washes in Gila River floodplain. | Wild material | Large shrub or small, multitrunked trees approximately 25 feet in height with a sprawling growth habit. | 2139673 | WLP 2702 |
| 19 | Ames 35740 | Iroquois County Conservation Area | Sassafras albidum (Nutt.) Nees | Illinois, United States | NC7 |  | Not Available | 2021 | COLLECTED | 08/27/2021 | Iroquois County State Wildlife Area located approximately 4.5 miles northeast of Beaverville T29N R11W NE1/4 Sec. 22 and also NW1/4 Sec. 13 | 40.98890900, -87.58503400 | 195 | Edge of hardwood forest, along roadside. | Wild material | Sassafras albidum is an early successional, vigorously suckering native tree found throughout southeastern North America stretching from eastern Texas to Maine. In Illinois, the species is only found in the southeastern portion (two-thirds) of the state. Sassafras is found in nature typically in dry to slightly mesic woodland edges and fencelines. Sassafrass is dioecious where male and female flowers are on separate plants. Noteble characteristics include oddly shaped leaves; a wide vareity of attractive fall colors (red, orange, or yellow); and stems that have an attractive spicy odor when scratched. Highly prized fruits by birds are single-seeded black drupes with bright red pedicels that mature in late summer. This accession was collected on the northwest edge (USDA Cold Hardiness Zone 5b) of the species range and may potentially contain genetics for winter hardiness exceeding that of typical Sassafras. Specimens sampled in nature ranged from 20-40' in height and 5-8" d.b.h. and the percentage of specimens suspected to be of reproductive age actually noted with fruits at the time of sampling (2021) was estimated at only 5-10%. It is possible that pollination on other potentially female specimens did not occur. During a grow out of seedlings at the North Central Regional Plant Introduction Station in Ames, Iowa in 2022, fall color on potted specimens peaked the first week in October. In comparison to Ames 35741, genetics of this accession peaked color 5-7 days prior and seedlings originating from sample 982-3 were all reddish in color, while seedlings from all other samples (982-1 and 982-2) were a mix of yellow; yellow-orange; and reddish-orange. | 2120344 | Ames 35740 |
| 20 | Ames 35741 | Jubilee College State Park | Sassafras albidum (Nutt.) Nees | Illinois, United States | NC7 |  | Not Available | 2021 | COLLECTED | 08/27/2021 | Jubilee College State Park located approximately 14.0 miles northwest of Peoria, T10N R6E NW1/4 Sec. 26 and also NE1/4 Sec. 27 | 40.82422500, -89.79361000 | 203 | Edge of hardwood forest, along roadside. | Wild material | Sassafras albidum is an early successional, vigorously suckering native tree found throughout southeastern North America stretching from eastern Texas to Maine. In Illinois, the species is only found in the southeastern portion (two-thirds) of the state. Sassafras is found in nature typically in dry to slightly mesic woodland edges and fencelines. Sassafrass is dioecious where male and female flowers are on separate plants. Noteble characteristics include oddly shaped leaves; a wide vareity of attractive fall colors (red, orange, or yellow); and stems that have an attractive spicy odor whenn scratched. Highly prized fruits by birds are single-seeded black drupes with bright red pedicels that mature in late summer. This accession was collected on the extreme northwest edge (USDA Cold Hardiness Zone 5b) of the species range and may potentially contain genetics for winter hardiness exceeding that of typical Sassafras. Specimens sampled in nature ranged from 20-60' in height and 5-12" d.b.h. and the percentage of specimens suspected to be of reproductive age actually noted with fruits at the time of sampling (2021) was estimated at only 5-10%. It is possible that pollination on other potentially female specimens did not occur. A few specimens noted lacked the characteristic lobing of the leaves. During a grow out of seedlings at the North Central Regional Plant Introduction Station in Ames, Iowa in 2022, fall color on potted specimens peaked the first week in October. In comparison to Ames 35740, genetics of this accession peaked color approximately 5-7 days later. All seedlings displayed fall colors ranging from yellow; yellow-orange; and reddish-orange. | 2120345 | Ames 35741 |
| 21 | WLP 2484 | AS/TO/2021/017/117 | Thuja occidentalis L. | Illinois, United States | NA |  | | 2021 | COLLECTED | 08/26/2021 | State Route 71 along Illinois River located approximately 1.30 miles southwest of Ottawa, T33N R3E SW1/4 NE1/4 Sec. 15 | 41.33211800, -88.86347300 | 146 | Roadside at top of limestone cliff above Illinois River. | Wild material | Thuja occidentalis is a medium sized, evergreen tree that is native throughout northeastern North America stretching from Minnesota to Maine with scattered distributions in the Appalachian Mountains. In Illinois, Northern White Cedar was formerly listed as a state-threatened species, but delisted in 2004 (Mankowski 2012) and is localized to bluffs and cliffs of St. Peter sandstone and rocky outcroppings. Elsewhere, the species is abundant in sphagnum peat swamps, lake shorelines, and moist woods. This accession was collected on the southwest edge of the species native range and is one of the southern-most, known native localities in Illinois and thus may contain genetics for heat and drought tolerance. Genetics for this accessions were collected from two areas separated by approximately 6.50 miles. | 2120343 | WLP 2484 |
| 22 | Ames 34947 | JDC/MA/2019/030/909 | Magnolia acuminata (L.) L. | West Virginia, United States | NC7 | | Not Available | 2019 | COLLECTED | 08/12/2019 | Southwest edge of Dayton Knob just east of Smoke Hole Road adjacent to tributary that feeds into Austin Gap/South Branch Potomac River, Grant County | 38.95962000, -79.23319600 | 418 | Moist, mature woods. | Wild material | | 2096629 | Ames 34947 |
| 23 | Ames 34163 | 'Nsuhh' | Nyssa sylvatica Marshall | Tennessee, United States | NC7 | | Not Available | 2018 | DEVELOPED | PRE 02/15/2018 | | | | | Cultivar | Nyssa sylvatica ‘Nsuhh’ Green Gable™ is characterized by its upwardly sweeping lateral branches forming a tight pyramidal plant form, rapid growth rate, glossy dark green-colored leaves that maintain glossy dark green coloration throughout the summer, and resistance leaf spot. This male cultivar was selected based on performance in central Tennessee in USDA Plant Hardiness Zone 7a. | 1957749 | Ames 34163 |
| 24 | Ames 34164 | 'WFH1' | Nyssa sylvatica Marshall | Ohio, United States | NC7 | | Not Available | 2018 | DEVELOPED | PRE 02/15/2018 | | | | | Cultivar | Nyssa sylvatica ‘WFH1’ Tupelo Tower™ has a narrow pyramidal form, lustrous dark green summer foliage, and shades of orange in early fall. The original 'WFH1' cultivar at thirteen years of age measured approximately 4.6 meters in height and approximately 2.4 meters in spread at its widest point. Projected mature height is 9-12 meters tall by 6 meters wide. This cultivar was selected based on performance in northeastern Ohio in USDA Plant Hardiness Zone 6b. | 1957750 | Ames 34164 |
| 25 | Ames 33965 | JDC/PG/2017/013/767 | Populus grandidentata Michx. | Iowa, United States | NC7 |  | | 2017 | COLLECTED | 05/07/2017 | Private property approximately 2.98 miles west of Luther, T83N R26W NE 1/4 SE 1/4 NE 1/4 Sec. 28., Boone County | 41.97486900, -93.87548500 | 328 | Woodland. Deciduous forest. | Wild material | Superior, yellow fall color peaked on 21 October 2015. Fruits matured on 3 May 2017 coinciding with flower initiation on local genotypes of Prunus virginiana. Specimens sampled approximately 60' in height and 16-22" dbh. Only 3 females (possibly different genets) and 1 male noted in immediate area. Seed production extremely poor in 2017 likely due to environmental conditions or lack of pollen availability. P. grandidentata is somewhat common throughout parts of the Des Moines River Valley in Boone County, but very localized and would be considered a disjunct population. The next closest population would be noted in Hardin County (Iowa). The native range for P. grandidentata is largely throughout most of the northeastern U.S. | 1949856 | Ames 33965 |
| 26 | Ames 32802 | JDC/CL/2014/119/621 | Carya laciniosa (F. Michx.) W. P. C. Barton | Iowa, United States | NC7 |  | Not Available | 2014 | COLLECTED | 10/07/2014 | Slab Castle Wildlife Management Area T71N R21W NW 1/4 of NE 1/4 Sec. 15. | 40.95387600, -93.25948800 | 290 | Bottomland/floodplain of Chariton River watershed. | Wild material | | 1921813 | Ames 32802 |
| 27 | Ames 32803 | JDC/CL/2014/123/625 | Carya laciniosa (F. Michx.) W. P. C. Barton | Iowa, United States | NC7 | | Not Available | 2014 | COLLECTED | 10/07/2014 | Lake Rathbun Wildlife Management Area (SW Unit), NE 1/4 of Section 16, T69N, R20W, Wayne County. | 40.77896400, -93.15695800 | 292 | Bottomland/floodplaind overflow of South Fork Chariton River. | Wild material | | 1921814 | Ames 32803 |
| 28 | Ames 33356 | Ames 33356 | Carya glabra (Mill.) Sweet | Illinois, United States | NC7 | | Not Available | 2014 | COLLECTED | 09/28/2014 | Illinois State Fairground southwest of pavilion, T16N R5W SW 1/4 Sec. 15, Springfield, Sangamon County. | 39.83349400, -89.64913100 | 171 | Rolling upland forest. | Wild material | The genus Carya, belonging to the Juglandaceae family, comprises approximately 23 species and hybrids in North America that are typically medium to large trees, rarely shrubs. The native distribution of C. glabra includes mostly the eastern half of the U.S., with northern limits stretching into southern Michigan with western limits touching the eastern Iowa border. Pecans, C. illinoinensis, are economically important due to their utilization via nut production for human consumption, while the true hickories are extremely valuable for wildlife, wood working, and of course providing that “hickory-smoke” flavor to meats. C. glabra meats are not known for being consumed via humans, but are attractive to various birds and animals. Their presence is likely lacking in the human diet due to the difficulty in extracting the meats. Notable ornamental characteristics include newly emerging foliage that resembles a flower, and yellow/brown fall color. Foliage is typically very clean with little to no foliar diseases. Carya are not a commonly planted species via the nursery trade largely due to the presence of an extensive taproot system that makes transplanting difficult. While the average homeowner may claim “nuts” in the landscape are an undesirable trait or a nuisance, attention should be turned to the benefits of nuts in the landscape. Generally it is difficult to find nuts on the ground as wildlife quickly eat and gather them. Hickories tend to be labeled as “slow growing”, which is definitely not true. Carya are only slow growing during the first few years of establishment as growth is focused on root growth. Shortly after establishment, growth on a properly planted Carya can be considered extremely vigorous with annual growth easily surpassing two to three feet per year. All Carya are noted for being extremely drought tolerant, while C. illinoinensis, C. cordiformis, C. acquatica, and C. laciniosa are also flood tolerant. This species is adapted to extremely dry soils and should not be planted in wet soils. | 1940349 | Ames 33356 |
| 29 | Ames 32199 | Ames 32199 | Zelkova serrata (Thunb.) Makino | Kansas, United States | NC7 | | Not Available | 2014 | COLLECTED | 11/28/2012 | John C. Pair Horticulture Center, Haysville. | | | | Cultivated material | In 1978, Dr. John C. Pair received three plants of NA 40324 Zelkova serrata and 5 plants of NA 40327 Zelkova serrata as distributions through the National Arboretum. As of 2013, two plants of NA 40324 and 3 plants of NA 40327 still remain at the John C. Pair Horticulture Center (Haysville, Kansas). Accession Ames 32199 was grown from seed harvested by Dr. Jason Griffin from a single specimen of NA 40327. It is likely that pollen from either NA 40324 or NA 40327 could have served as donors. Out of the five specimens of Zelkova serrata currently alive, the single specimen of NA 40327 that was harvested by Dr. Jason Griffin was reported as having the best fall color (2012) and is currently the largest specimen. NA 40324 was originally acquired by the National Arboretum as seed on 1/14/1977 from Masanori Nakamura, Suwa-City, Nagano Prefecture, Japan. NA 40327 was originally acquired by the National Arboretum as seed on 1/18/1977 from the Kyoto University Forest Experiment Station. | 1917225 | Ames 32199 |
| 30 | Ames 32093 | JDC/CC/2013/048/492 | Carpinus caroliniana Walter | Iowa, United States | NC7 | | | 2013 | COLLECTED | 10/25/2013 | Ledges State Park mostly from specimens adjacent to Peas Creek, NE ¼ of SE ¼ of Sec. 16, T83N R26W, Des Moines Quad. | 41.99910000, -93.87880000 | 328 | North and northwest-facing slopes. | Wild material | The native range of Carpinus caroliniana is concentrated in the eastern half of the U.S. with a very small disjunct population in central Iowa (Little, 1971). This accession represents a collection of C. caroliniana germplasm from the extreme western edge of the species native range, specifically the central Iowa disjunct population at Ledges State Park. The next closest occurrence is in eastern Iowa (100-150 miles). As of 2025, one specimen at Ledges State Park (McCoy Wildlife Area) currently represents the state of Iowa's largest C. caroliniana specimen measuring 6.68" DBH, 41.67’ in height, and 23.75’ average crown spread for a total of 68.608 points (Rouw, M., personal communication, 4 May 2022). This accession does include genotypes that do tend to sucker/form clonal colonies. Fall color (red/orange) tends to peak in the last week of October (central Iowa) with peak fruiting occurring simultaneously. Bark smooth, grey. | 1914037 | Ames 32093 |
| 31 | DPRU 3195 | DPRU 3195 | Prunus hortulana L. H. Bailey | Missouri, United States | DAV |  | | 2013 | COLLECTED | 08/13/2013 | Property of Prairie Garden Trust (Henry and Lorna Domke), New Bloomfield Quad, northeast of New Bloomfield, Callaway County. | 38.74118667, -92.03118433 | 235 | Numerous specimens scattered throughout property, but localized/common to small drainage ditches; associated with Diospyros virginiana, Juglans nigra, Juniperus virginiana, Prunus serotina, Quercus imbricaria, Toxicodendron radicans, Carya ovata, Cornus florida, and Robinia pseudoacacia. | Wild material | Specimen 1: fruit diameter ranged between 17 mm-20 mm; approximately 20 feet in height and 20 feet in spread; leaves papery thin to the touch and glabrous. Specimen 2: fruit diameter ranged between 15 mm and 17 mm; fruits mostly red. Specimen 3: fruit diameter ranged between 18 mm and 19 mm; fruits mostly red. Specimen 4: fruit diameter ranged between 18 mm and 19 mm; fruits mostly green (a few red). Specimen 5: fruit diameter ranged between 15 mm-17 mm, fruits slightly longer (1 mm) than wide; approximately 15 feet in height; leaves papery thin to the touch and glabrous. Specimen 6: fruit diameter ranged between 20 mm and 22 mm; fruits mostly red. | 1912772 | DPRU 3195 |
| 32 | DPRU 3196 | DPRU 3196 | Prunus hortulana L. H. Bailey | Missouri, United States | DAV |  | | 2013 | COLLECTED | 08/14/2013 | Specimen 1 along South Rangeline Road, SW 1/4 of Section 30; Specimen 2 along State Road H (East Englewood Road), NW 1/4 of SE 1/4 of Section 30; Specimen 3 near State Road H (East Englewood Road), SE 1/4 of NE 1/4 of SE 1/4 of Section 30; Specimen 4 along South Rangeline Road, near airport, NW 1/4 of NW 1/4 of NW 1/4 of Section 30; Millersburg SW Quad, Boone County. | 38.82384400, -92.20357575 | 267 | Specimen 1 growing roadside, associated with Festuca and Solidago. Specinen 2 growing roadside, associated with Quercus bicolor, Toxicodendron radicans, and Ulmus. Specimen 3 growing in windbreak, associated with Celtis occidentalis, Juniperus virginiana, Lonicera maackia, Toxicodendron radicans, and Ulmus. Specimen 4 growing roadside associated with Celtis occidentalis, Diospyros virginiana, Euonymus atropurpueraus, Juniperus virginiana, Lonicera maackia, Salix, Toxicodendron radicans, Ulmus, and Vitis riparia. | Wild material | Specimen 1: fruit diameter ranged between 18 mm and 20 mm; fruits approximately 1 mm wider than long; approximately 10 feet in height and 6 feet in spread; leaves papery thin to the touch and glabrous; purple-copper colored bark with obvious lenticels. Specimen 2: fruit diameter ranged between 19 mm and 22 mm; approximately 15 feet in height and 10 feet in spread; leaves papery thin to the touch and glabrous; purple-copper colored bark on younger branches with exfoliating grayish bark on trunk. Specimen 3: fruit diameter ranged between 21 mm and 25 mm; approximately 20 feet in height and 10 feet in spread; leaves papery thin to the touch and glabrous; greyish, exfoliating bark. Specimen 4: fruit diameter ranged between 19 mm and 20 mm; approximately 20 feet in height and 10 feet in spread; leaves papery thin to the touch and glabrous; greyish, exfoliating bark. | 1912773 | DPRU 3196 |
| 33 | DPRU 3197 | DPRU 3197 | Prunus hortulana L. H. Bailey | Missouri, United States | DAV |  | | 2013 | COLLECTED | 08/14/2013 | Adair County, along Old Channel Creek, near Sand Creek Bottom Road, NE 1/4 of SW 1/4 of SE 1/4 of Section 27, Connesville Quad. | 40.31811300, -92.67244700 | 235 | Associated with Acer saccharinum, Parthenocissus, Solidago, Ulmus, and Vitis riparia. | Wild material | Fruit diameter ranged between 18 mm and 22 mm. Fruits slightly oblong (2 mm longer than wide). Approximately 20 feet in height and 20 feet in spread. Leaves papery thin to the touch and glabrous. | 1912774 | DPRU 3197 |
| 34 | NA 81198 | NA 81198 | Quercus muehlenbergii Engelm. | Ohio, United States | NA | | Not Available | 2012 | COLLECTED | 10/07/2012 | Ohio: Franklin County; Battelle-Darby Metro Park � Cedar Ridge Overlook, approximately 12 miles southwest of Columbus, Ohio. | 39.90114600, -83.21246800 | 272 | Dry to mesophytic forest along clay-rich, west-facing bluffs of Big Darby Creek. | Wild material | Specimens sampled were generally 50-60 ft in height and 15-20 ft in width. The trunk diameter at breast height was 15-20 in. | 1905328 | NA 81198 |
| 35 | Ames 31626 | JDC/CL/2012/051/444 | Carya laciniosa (F. Michx.) W. P. C. Barton | Iowa, United States | NC7 |  | Not Available | 2012 | COLLECTED | 09/27/2012 | Lake Odessa Complex: population growing in the Mississippi floodplain (Pool 17 - Mississippi River miles 434.5 to 436) near the confluence of the Iowa and Mississippi River. T74N R2W Sec. 35, Toolesboro Quad, Louisa County. | 41.16214300, -91.04669000 | 166 | Floodplain that receives periodic flooding. Fairly well drained soils. | Wild material | | 1905348 | Ames 31626 |
| 36 | Ames 31627 | Ames 31627 | Carya laciniosa (F. Michx.) W. P. C. Barton | Iowa, United States | NC7 | | Not Available | 2012 | COLLECTED | 09/26/2012 | Wapsipinicon Bottoms: population growing in the Mississippi floodplain (Pool 14 - Mississippi River miles 507 to 508) just upstream along the Mississippi River just north of the confluence of the Wapsipinicon River - T80N R6E E 1/2 SW 1/4 Sec. 6 (41.761288, -90.307546) Camanche Quad and T80N R5E SW 1/4 SE 1/4 Sec. 12 (41.745071, -90.323457) Cordova Quad., Clinton County. | 41.74507100, -90.32345700 | 181 | Floodplain. | Wild material | | 1905349 | Ames 31627 |
| 37 | NA 81138 | JDC/QM/2012/045/438 | Quercus muehlenbergii Engelm. | Iowa, United States | NA |  | Not Available | 2012 | COLLECTED | 09/13/2012 | Iowa: Lee County; NE1/4 Sec. 34, Keokuk Quad on private property with owner's permission. Second individual at coordiinates 40.385547 N, -91.423895 W (individual 01-2). Additional individuals' GPS coordinates available (see Special Characters). | 40.38544300, -91.42315600 | 173 | South and southwest-facing slopes (40 degrees) | Wild material | Abundant population (100+ specimens). Large variation in leaf width across specimens from very narrow to very wide (possibly Q. muehlenbergii x Q. macrocarpa hybrids). Foliage quality was fairly poor possibly due to mites and/or drought. Acorn production was fairly light. Timing of harvest was a couple days early as acorns were greenish-yellow. One specimen noted possibly a Q. muehlenbergii x Q. macrocarpa hybrid. | 1905322 | NA 81138 |
| 38 | NA 81139 | JDC/QM/2012/046/439 | Quercus muehlenbergii Engelm. | Illinois, United States | NA |  | Not Available | 2012 | COLLECTED | 09/13/2012 | Illinois: McLean County; Funks Grove: Sec. 19 and Sec. 20, McLean Quad on private property with owners' permission. Second tree at coordinates 40.349165 degrees N, 89.134180 degrees W (individual 02-2). | 40.34976700, -89.12903600 | 206 | Very flat terrain and most likely relatively deep soils. Specimens sampled were near a small drainage ditch. | Wild material | Acorns were yellow-brown and starting to drop. Other specimens in area already dropped acorns. Acorn production was relatively heavy. Dark, glossy leaves of excellent quality. Both specimens sampled were close to 5-6" d.b.h., approximately 100' in height and spread. A number of blue ash still bearing seeds (persistent since mid-July). | 1905323 | NA 81139 |
| 39 | NA 81140 | JDC/QM/2012/047/440 | Quercus muehlenbergii Engelm. | Indiana, United States | NA |  | Not Available | 2012 | COLLECTED | 09/14/2012 | Indiana: Lawrence County; SW1/4 Sec. 5 and SE1/4 NW1/4 Sec. 5, Bedford East Quad on private property with owners' permission. Additional trees' coordinates at 38.805460 N, -86.435955 W (individual 03-2) and 38.813357 N, -86.433675 W (individual 03-3). | 38.80791300, -86.43648000 | 177 | Old cow pasture. West-facing slope (40 degrees) | Wild material | Specimens 03-1 and 03-3 measured approximately 5-6" d.b.h. and 90' in height and 120' spread. Acorns were abundant and ranged from green, to yellow, to brown. One potential hybrid (Q. muehlenbergii x Q. macrocarpa) located at 40.348967, -89.134509. | 1905325 | NA 81140 |
| 40 | NA 81141 | JDC/QM/2012/048/441 | Quercus muehlenbergii Engelm. | Indiana, United States | NA |  | Not Available | 2012 | COLLECTED | 09/14/2012 | Indiana: Clark County; Charlestown State Park, with permission granted via Lucas Green, park manager. Additional trees' coordinates at 38.446954 N, -85.627281 W (individual 04-2); 38.447131 N, -85.641925 W (individual 04-3); 38.446647 N, -85.641590 W (individual 04-4), and 38.444289 N, -85.645788 W (individual 04-5) | 38.43584100, -85.62728100 | 174 | Open glade and mixed deciduous forest. Very dry, shallow soils | Wild material | Acorns still fairly green and quite small. | 1905327 | NA 81141 |
| 41 | Ames 34218 | NYCPDR-BBG-101 | Betula lenta L. | New Jersey, United States | NC7 |  | | 2012 | COLLECTED | 10/11/2011 | Norvin Green State Forest, along Red Trail, Passaic County | 41.06530000, -74.33732000 | 243 | | Wild material | | 1900091 | Ames 34218 |
| 42 | Ames 31054 | 359 | Betula lenta L. | New York, United States | NC7 |  | | 2011 | COLLECTED | 09/11/2011 | Hurd Cross Road, Steuben County. | 42.04000000, -77.07900000 | 443 | Roadside. | Wild material | | 1891440 | Ames 31054 |
| 43 | NA 81605 | JDC/AG/2010/028/298 | Aesculus glabra Willd. | Iowa, United States | NA | | Not Available | 2010 | COLLECTED | 09/10/2010 | Along North Raccoon River and Sportsman Club Road, north of Adel, NW 1/4 of NW 1/4 of Section 18, T79N, R27W, Panther Quad, Dallas County. | 41.65600000, -94.04510000 | 322 | Floodplain. Associated with Acer negundo, A. saccharinum, Celtis occidentalis, Gleditsia triacanthos, and Gymnocladus dioicus. | Wild material | Very tall (55-60 feet in height) specimens. Largest specimen noted measured 62.23cm in d.b.h. | 1856466 | NA 81605 |
| 44 | Ames 30126 | Duplicate of NA 76639 | Aesculus parviflora Walter | | | | Historic | 2009 | | | | | | | Wild material | Duplicated of NA 76639. NCRPIS received G. Barrett material in 2009 and Chauncey et al. material in 2017. | 1816401 | Ames 30126 |
| 45 | Ames 29977 | Ames 29977 | Platanus occidentalis L. var. glabrata (Fernald) Sarg. | Texas, United States | NC7 |  | | 2009 | COLLECTED | | Near Ingram, Kerr County. | 30.06555556, -99.22111111 | 510 | Native population along the Guadalupe River, Edwards Plateau. | Wild material | | 1800372 | Ames 29977 |
| 46 | Ames 29821 | Ames 29821 | Liriodendron tulipifera L. | Michigan, United States | NC7 | | Not Available | 2008 | COLLECTED | 12/15/2008 | Fernwood Botanic Gardens, Niles. | 41.86611111, -86.34666667 | 210 | Dense shade. | Wild material | | 1791160 | Ames 29821 |
| 47 | Ames 29832 | Ames 29832 | Taxodium distichum (L.) Rich. | Texas, United States | NC7 | | Not Available | 2008 | COLLECTED | | Numerous sites along the Frio River, Real County. | 29.69416667, -99.75361111 | 469 | | Wild material | Donor reports that this population tolerates alkaline soils well, in contrast to typical populations of Taxodium distichum. | 1793761 | Ames 29832 |
| 48 | Ames 29624 | JDC/CI/2008/039/109 | Carya illinoinensis (Wangenh.) K. Koch | Missouri, United States | |  | Historic | 2008 | COLLECTED | 10/08/2008 | Along White Sands Road, near Magnolia Hollow Conservation Area, T38N, R8E, Bloomsdale Quad, Ste. Genevieve County. | 38.01277778, -90.18888889 | 119 | Associated with Acer saccharinum, Campsis radicans, Cassia fasciculata, Celtis laevigata, Fraxinus, Gleditsia triacanthos, and Menispermum canadense. | Wild material | Very large original specimens measuring approximately 4 feet d.b.h. and 120-130 feet in height. Large variation in seed shape/size and leaf shape/size. | 1788179 | Ames 29624 |
| 49 | Ames 29625 | JDC/DV/2008/036/106 | Diospyros virginiana L. | Missouri, United States | NC7 | | Not Available | 2008 | COLLECTED | 10/08/2008 | August A. Busch Memorial Conservation Area, T46N, R3E, Weldon Spring Quad, St. Charles County. | 38.70444444, -90.72972222 | 183 | | Wild material | Large variation in fall color: some original specimens exhibited yellow and others exhibited bronze-red tones. | 1788180 | Ames 29625 |
| 50 | Ames 29669 | JDC/QB/2008/024/094 | Quercus bicolor Willd. | Missouri, United States | NC7 |  | Not Available | 2008 | COLLECTED | 10/06/2008 | Thousand Hills State Park, NW 1/4 of SW 1/4 of Section 12, T62N, R16W, Novinger Quad, Adair County. | 40.18805556, -92.64500000 | 280 | Specimens were approximately 30 yards apart. | Wild material | Both original specimens sampled measured approximately 4-5 feet d.b.h. and 60 feet in height. Noted true-to-type morphological characteristics of Q. bicolor (long peduncles, flaking bark on 3rd year branches, whitish undersides). | 1788224 | Ames 29669 |
| 51 | NA 81010 | JDC/QB/2008/079/149 | Quercus bicolor Willd. | Iowa, United States | NA |  | Not Available | 2008 | COLLECTED | 10/21/2008 | Chichaqua Wildlife Habitat Park bottoms, near Elkhart, NW 1/4 of NW 1/4 of Section 32, T81N, R22W, Loring Quad, Polk County. | 41.79000000, -93.43972222 | 247 | | Wild material | A couple of specimens are approximately 300 years in age. Very large mature specimens, approximately 70-90 feet in height and 4-5 feet d.b.h. Largest specimen sampled was 54.5" d.b.h. A small proportion of seedlings during grow out were noted to be Q. bicolor x Q. macrocarpa hybrids. | 1788225 | NA 81010 |
| 52 | Ames 29229 | 'Mongolian Silver Spires' | Caragana microphylla Lam. | Mongolia | NC7 |  | Not Available | 2007 | COLLECTED | 1997 | Xilinhot, Inner Mongolia. | | | | Cultivated material | Sparkling ferny silver leaves, narrow upright habit on this xeric shrub. Large (3/4") yellow flowers produce red seed pods. Selected from seed from a Mongolian steppe. Used for hedge or low windbreak; somewhat spiny. | 1740665 | Ames 29229 |
| 53 | Ames 29046 | 'NE-Arb' | Populus tremuloides Michx. | Nebraska, United States | NC7 |  | Not Available | 2007 | COLLECTED | NEAR 1975 | North portion of the Platte River Valley, northeast of Columbus. | 41.48202500, -97.31057700 | | Pasture. | Cultivar | Selected for its resistance to leaf spot, especially under high humidities. Good yellow fall color with whitish bark in Midwest U.S. Rapid growth rate without chlorosis problems. Upright slender growth habit. Annual growth averages around 3 to 5 feet per year. Tolerates very dry conditions and heavy clay soils, but prefers well-drained sandy-loam soils. Female clone. | 1726624 | Ames 29046 |
| 54 | Ames 28316 | JDC-0022006 | Ginkgo biloba L. | Nebraska, United States | NC7 | | Not Available | 2006 | COLLECTED | 09/11/2006 | Along trail directly north from white mansion/lodge, Arbor Lodge State Park, Nebraska City, NE 1/4 of NE 1/4 of Section 7, T8N, R14E, Nebraska City NW Quad, Otoe County. | 40.68138889, -95.88083333 | 325 | Garden/arboretum setting. Full sun. No slope. Population of 8 growing in occasional abundance with pure distribution. | Cultivated material | Plants approximately 3 feet in diameter and 40-60 feet in height. Perfectly clean foliage. Moderate seed production. | 1708687 | Ames 28316 |
| 55 | Ames 28317 | JDC-0032006 | Tetradium sp. | Nebraska, United States | NC7 |  | Not Available | 2006 | COLLECTED | 09/11/2006 | Along trail north-northwest from white mansion/lodge, Arbor Lodge State Park, Nebraska City, NE 1/4 of NE 1/4 of Section 7, T8N, R14E, Nebraska City NW Quad, Otoe County. | 40.68138889, -95.88027778 | 325 | Garden/arboretum setting. Full sun. No slope. Population of 2 growing in rare abundance with uniform distribution. | Cultivated material | Trees, approximately 1-2 feet in diameter and 30-35 feet in height. Very clean foliage. Heavy seed production. | 1708688 | Ames 28317 |
| 56 | Ames 27961 | 'September Sun' | Alnus maritima (Marshall) Muhl. ex Nutt. subsp. oklahomensis J. A. Schrad. & W. R. Graves | Oklahoma, United States | NC7 |  | Not Available | 2005 | COLLECTED | 10/15/1997 | Blue River watershed approximately 8.0 miles northeast of Tishomingo, Johnston County | 34.33336800, -96.59511400 | | | Cultivar | Selected from a trial of seedlings af A. maritima subsp. oklahomensis on the campus of Iowa State University, Ames. The seed that formed the original plant was obtained from an open-pollintaed A. maritima subsp. oklahomensis growing on the bank of the Blue River near Tishomingo, Oklahoma. 'September Sun' has been propagated with high rates of success from softwood cuttings by using the methods of Schrader and Graves. Ramets grow rapidly and can be 2 meters tall within 2 years. Suitable for use in USDA hardiness Zone 4a and possibly in areas as cold as USDA Zone 3a. Although the heat tolerance and minimal chilling requirement of this cultivar have not been established, it is native to USDA Zone 7a. Therefore, its useful range includes areas with mean annual minimum temperatures at least as mild as -15 C, and attempts to use 'September Sun' in somewhat milder climates are warranted. Thrives in wet soils, can survive complete inundation of its root zone with fresh water indefinitely, and is more resistant to drought than are other alders cultivated in North America. Should be planted at exposed sites only. Its symbiotic relationship with Frankia, makes 'September Sun' an excellent choice for nitrogen-poor soils. Vigorous plants that remain free of foliar chlorosis in soils exceeding pH 7 have been grown in Iowa. Mature plants are large shrubs or small trees with multiple trunks that form broadly rounded, upright canopies 7 meters tall and 5 meters wide. Trunks support more leaves and axillary shoots than are found on plants of the others subspecies. This leads to dense canopies of glossy leaves that are darker green than the leaves of all other alders indigenous to North America. Leaves display mottled blends of yellow, orange, and rich brown under autumnal conditions in USDA hardiness Zone 5a. The infructescences of 'September Sun' are medium to dark brown, cone-like strobili; each is 16-22 mm long and 11-14 mm in diameter. Strobilimature 1 year after pollination and then persist on the branches through at least one more season, providing subtle ornamental appeal throughout the year. This cultivar differs from other genotypes of its species as the fastest-growing, most densely foliated, and most symmetrically shaped individual observed in field trials with over 1000 plants. | 1700783 | Ames 27961 |
| 57 | Ames 27963 | 'J.N. Select' | Carpinus caroliniana Walter | Wisconsin, United States | NC7 | | Not Available | 2005 | DEVELOPED | | | | | | | The result of intentional selection for outstanding vigor and superior fall foliage colors, with a high percentage of individuals with orange to red color. The strain originated at Johnson's Nursery from seedlings obtained from various sources, including the Minnesota Landscape Arboretum and Milwaukee County Parks, along with wild populations from southern Wisconsin. The various sources were allowed to intermate and seeds were harvested only from parent trees with orange to red fall color. Probable hardiness to USDA Zone 3b. | 1692088 | Ames 27963 |
| 58 | Ames 27969 | Ames 27969 | Philadelphus microphyllus A. Gray | Utah, United States | | | Historic | 2005 | COLLECTED | PRE 10/2005 | Near Richfield, Sevier County. Please contact curator for specific site location. | 38.00000000, -112.00000000 | 1935 | Dry, rocky volcanic soil. Associated with Ephedra viridis and fourwing saltbush. | Cultivar | Large and copious flower display. | 1700482 | Ames 27969 |
| 59 | Ames 27971 | 'Silver Lake' | Salix pentandra L. | North Dakota, United States | NC7 |  | | 2005 | DEVELOPED | | | | | | | A superior selection based upon 13 years of evaluating four accessions at four NDSU Research/Extension Centers across the state of North Dakota. This selection originated from a farm near Brinsmade, ND, where it flourished nearly a century. The site was somewhat alkaline in pH, but the tree never suffered from chlorosis due to iron deficiency, a common problem incurred by some trees in such sites. Survival rate after 13 years at four NDSU research sites averaged 90%. The other accessions averaged 79, 67, and 58% survival, respectively. Grows rapidly, produces a dense, rounded tree with very dark green, highly glossy foliage. It requires pruning, as do all Laurel Willows, to produce a single-trunked tree in nursery production. The glossiness of the leaves reflect sunlight much like a mirror, hence its name. USDA hardiness Zone 3. Shelter, shade, park, and specimen tree. | 1692094 | Ames 27971 |
| 60 | Ames 27805 | 9076718 | Pinus sylvestris L. var. mongolica Litv. | Heilongjiang Sheng, China | NC7 |  | | 2005 | COLLECTED | 10/1994 | Nenjiang. | 49.18333333, 125.21666667 | | | | | 1685167 | Ames 27805 |
| 61 | Ames 27806 | 9076719 | Pinus sylvestris L. var. mongolica Litv. | Heilongjiang Sheng, China | NC7 | | | 2005 | COLLECTED | 12/1995 | Shangzhi. | | | | | | 1685168 | Ames 27806 |
| 62 | Ames 27970 | 'Center Glow' | Physocarpus opulifolius (L.) Maxim. | Minnesota, United States | NC7 | | Not Available | 2005 | DONATED | 05/01/2005 | | | | | Cultivar | | 1700788 | Ames 27970 |
| 63 | Ames 27797 | No. 32 | Physocarpus opulifolius (L.) Maxim. | Pennsylvania, United States | NC7 | | Not Available | 2005 | COLLECTED | | Along Butter Creek, Manderville Preserve, Piedmont Province, Bucks County. | 40.38333333, -75.36666667 | 150 | Moist deciduous woods on slope. Growing with Liriodendron tulipifera, Tilia americana, Fraxinus americana, and Lindera benzoin. | Wild material | | 1684776 | Ames 27797 |
| 64 | Ames 27768 | 139 | Salix eriocephala Michx. | Missouri, United States | NC7 |  | | 2005 | COLLECTED | 10/29/2004 | North side of the intersection of Highways 21 & 47 approximately 4.80 miles north of Old Mines, Washington County. | 38.07570000, -90.73820000 | 195 | Fen. 0-3% slope with a northwestern aspect. Heavy clay. | Wild material | Male clone with two stamens per staminate flower; smooth grey bark with rather brittle branches; glabrous (adaxial) remotely shallowly serrulate leaves measuring 9-10 cm long and 1.5 cm wide; slightly pubescent petiole (adaxial) measuring 12-20 mm long; dormant buds rather red in color with matted pubescence; stipules measuring 3-6 mm (up to 10 mm) long and 2-3 mm wide with noticeable, widely-spaced nob-like serrations; stipules somewhat to rather persistent; rounded, multi-stemmed shrub reaching 3.5 m tall and 6.0 m wide after 10 years of growth. Very attractive growth habit, including winter interest. Best adapted to central and southern Midwest and cold-hardy to USDA Cold Hardiness Zone 5a, but likely hardy to Zone 4a. | 1683020 | Ames 27768 |
| 65 | Ames 27629 | Separation from PI 596380 | Forestiera pubescens Nutt. | New Mexico, United States | NC7 |  | | 2004 | COLLECTED | 1939 | Vicinity of Jemez Springs, Sandoval County. | 35.76380500, -106.69148200 | 1914 | Commonly found along streams, hillsides, and mesas between 910-2100 meters elevation in southwestern woodlands and desert grassland of north and central Arizona & New Mexico. | Cultivar | Columnar clone selected from PI 596380 for its narrow, upright growth habit. After 10 years of growth in cultivation (central Iowa), this clone measured 3.90 m in height with a 2.10 m spread. | 1667210 | Ames 27629 |
| 66 | WLP 1215 | NA 78171 | Hydrangea arborescens L. | North Carolina, United States | NA |  | | 2004 | COLLECTED | 10/02/2004 | Highway 276 to East Fork Road, Pine Shore Lakes, Brevard, Transylvania County. | 35.12611111, -82.72944444 | 851 | Pine-oak forest. Lakeside on private land. 15 degrees of slope. Associated with Acer, Cornus florida, Magnolia, Pinus strobus, and Quercus. | Wild material | 1-4 meters tall. | 1667573 | WLP 1215 |
| 67 | Ames 27371 | 'Morton' | Aronia melanocarpa (Michx.) Elliott | Illinois, United States | | | Historic | 2004 | COLLECTED | 10/14/1978 | Rutland Bog, formerly known as Henpeck Bog located approximately 3.5 miles south of Huntley, T47N R7E NW 1/4 SW 1/4 Sec. 16, Kane County. | 42.11700000, -88.43100000 | 278 | Peat based bog. High-quality native site. Growing in association with Betula pumila, Carex spp., Populus tremuloides, Triadenum fraseri, Rubus allegheniensis, Ilex verticillata, Dryopteris spinulosa, Dryopteris thelypteris var. pubescens, Rhamnus frangula, Bidens cernua, Ludwigia palustris, Erechtites hieracifolia, Chamaedaphne calyculata var. angustifolia, and Pteridium aquilinum. | Cultivar | Selection from the collections at The Morton Arboretum, Lisle, Illinois. It originated from seed collected in a bog habitat in Kane County, Illinois. Multi-stemmed, deciduous shrub selected for its unique compact, non-leggy habit, showy display of small white flower clusters, glossy foliage, abundant production of black fruit, and attractive orange to deep red fall foliage. Establishes quickly and slowly forms colonies via root suckers. Grows less than 3 feet high with a 5 foot spread in ten years. Growth rate slow to medium. Flowers are showy 2-inch-wide clusters of small white flowers; produced early to mid-May. Lustrous dark green foliage remains clean and disease-free all summer, turning an attractive orange to deep red in fall; best fall color develops on plants sited in full sunlight. Black to purplish-black fruit; 1/3 inch berrylike fruits are borne in slightly pendulous clusters; fruit can persist until late fall/early winter, although native birds can consume the majority of the fruit earlier. USDA Hardiness Zones 3-8. | 1662205 | Ames 27371 |
| 68 | WLP 772 | NA 73815 | Cercis canadensis L. | Iowa, United States | NA |  | | 2004 | COLLECTED | 09/22/2003 | West of Ely Ford, Lacey-Keosauqua State Park, Keosauqua, T68N R10W, NE 1/4 of SE 1/4, Section 3, Keosauqua Quad, Van Buren County. | 40.71666667, -91.99055556 | 177 | Edge of trail and parking area, floodplain forest. Half sunny. Flat slope. Associated with Toxicodendron, Celtis, Vitis (not riparia), and Symphoricarpos orbiculatus. | Wild material | | 1897399 | WLP 772 |
| 69 | Ames 27340 | Ames 27340 | Quercus alba L. | Nebraska, United States | | | Historic | 2003 | COLLECTED | | 6 miles north and 2 miles west of the village of Humboldt, 1.5 miles east of Highway 105, near the western edge of the Richardson/Nemaha County line. | 40.26138889, -96.01666667 | | Grazed area void of other plant material. Flat terrain. Clay loam soil. Associated with Quercus macrocarpa. | Wild material | 50-60 feet high. | 1649924 | Ames 27340 |
| 70 | Ames 27341 | JDC/UT/2017/021/775 | Ulmus thomasii Sarg. | Nebraska, United States | NC7 |  | | 2003 | COLLECTED | | Ponca State Park just north of Ponca approximately 2.75 miles T30N R6E N1/3 SE 1/4 Sec. 3 | 42.60173800, -96.71222100 | 383 | Eastern slopes and ridges of loess bluffs | Wild material | Ulmus thomasii (Rock elm) is an underutilized tree species both in conservation and in the urban landscape. Charles Sprague Sargent (first director of the Arnold Arboretum of Harvard University, Boston, MA) described the wood of Rock Elm as "heavy, hard, very strong and tough, closely grained, and susceptible of receiving a beautiful polish". Historically noted for a variety of uses in woodworking including furniture, heavy agricultural implements, timber frame buildings, pianos, hockey sticks, and hand tools. U. thomasii is extremely drought tolerant, adaptable to very calcareous soils, and compared to U. americana or U. rubra has a very conservative growth rate requiring minimal attention in regards to pruning. Rock elm naturally tends to develop into a nice structural specimen in the landscape, unlike other fast growing U. americana cultivars in the nursery trade needing frequent attention. Rock elm has very fissured bark and is well known for maintaining a strong central leader resulting in a very attractive, pyramidal form. Despite many literature sources stating that "wings" on the stems are a key identifiying characteristic, this trait is not reliable and many genotypes may completely lack "wings" on the stems. While growth habit and morphology of dormant buds (very pointy) are good traits to help aid in identification, fruits are the best way to confirm identity. Fruits are densly pubescent, often described as "inflated" and generally reach maturity a couple weeks after U. rubra and U. americana. U. thomasii inflorescences are rather distinguishable from other Ulmus in being pendulous. Fruits are extremely prized treats for many birds, where fruits are often "robbed" prior to full maturity. Fruits are also highly prized by many other animals such as mice, squirrels, chipmunks, turkeys, etc. and are generally consumed within hours after fruit abscission. The native range of U. thomasii is concentrated in the northeastern United States and into Canada with disjunct populations documented in northwestern Missouri and northwestern Arkansas (Little, E. L. Jr. 1971). In the 1895 Silva of North America (vol. 7) it was stated that, “The value of the wood of the Rock Elm threatens its extinction and most of the large trees have already been cut.” Today, since rock elm is rather rare, especially in areas near the edges of its range, many states list the species as endangered or threatened warranting preservation efforts. This accession was collected in northeast Nebraska (Dixon County) at Ponca State Park representing genetics from the extreme northwestern edge of the species native range and includes genetics (#775-6) from the current (2022) state champion. In an assessment of seedlings from all mother trees sampled (Carstens, J., personal communication, 12 April 2022), #775-4 produces the most vigorous seedlings which also consistently exhibited extremely corky/winged stems on new seedlings. Seedlings from other maternal lines show both winged and non-winged seedlings within the same maternal line and seedlings from some maternal lines have no wings. | 1649925 | Ames 27341 |
| 71 | WLP 771 | NA 73814 | Cephalanthus occidentalis L. | Iowa, United States | NA |  | | 2003 | COLLECTED | 10/21/2003 | Chichaqua Wildlife Habitat Park bottoms, Elkhart, T81N R22W, NW 1/4 of NW 1/4, Section 32, Loring Quad, Polk County. | 41.79000000, -93.43972222 | 247 | Edge of oxbow ponds. Sunny. Flat. Alluvial soil. Associated with reed canary grass, Anemone canadensis, Quercus bicolor, Cornus drummondii, and Amorpha fruticosa. | Wild material | Large, well branched shrubs to 2.5 meters tall. | 1649920 | WLP 771 |
| 72 | Ames 27328 | 31 | Ptelea trifoliata L. | Iowa, United States | | | Historic | 2003 | COLLECTED | 09/23/2003 | North edge of Lindsay Wilderness Area, Bonaparte, T68N R8W, NE corner of NE 1/4 of NE 1/4, Section 8, Bonaparte Quad, Van Buren County. | 40.71083333, -91.79583333 | 204 | Powerline cut. Sunny. ~10% slope with various aspects. Associated with Monarda fistulosa, Solidago altissima, Teucrium, and Symphoricarpos orbiculatus. | Wild material | Large shrubs or small trees. | 1649674 | Ames 27328 |
| 73 | WLP 920 | 35 | Cercis canadensis L. | Iowa, United States | NA |  | | 2003 | COLLECTED | 09/24/2003 | Bluff Park, Keokuk, South of Park Street at G, T65N R5W, Section 35, Keokuk Quad, Lee County. | 40.38861111, -91.40277778 | 194 | Bluff edge along Mississippi River. Sunny. 0-25% slope w/ S aspect. Soil well to good drainage. Assoc w/ Campsis radicans, Quercus muehlenbergii, Eupatorium (white snakeroot and tall boneset), Solidago, Lonicera maackii, and Catalpa. | Wild material | Small trees. Possibly wild, possibly originally cultivated, but Cercis very common in area, growing in city park. | 1649668 | WLP 920 |
| 74 | WLP 1332 | 9 | Lonicera reticulata Raf. | Iowa, United States | NA | | | 2003 | COLLECTED | 09/14/2003 | Parking area for ford, South Bear Creek Wildlife Area, Highlandville, T100N R7W, NE 1/4 of NE 1/4, Section 35, Highlandville Quad, Winneshiek County. | 43.44083333, -91.64722222 | 274 | Edge of parking area, floodplain. Half sunny. No slope with an eastern aspect. Alluvial soil. Associated with Juglans nigra, Ulmus, Acer negundo, Xanthoxylum, and Rhus glabra. | Wild material | One large, very attractive vine ~14 feet tall, climbing up a Juglans nigra tree. | 1649461 | WLP 1332 |
| 75 | WLP 769 | NA 73812 | Celastrus scandens L. | Iowa, United States | NA |  | | 2003 | COLLECTED | 09/14/2003 | Quandahl Road, Bear Creek Wildlife Area, Highlandville, T100N R7W, NE 1/4 of NW 1/4, Section 36, Dorchester Quad, Winneshiek County. | 43.44055556, -91.62388889 | 268 | Mostly sunny. Steep slope with a southeastern aspect. Thin soil over limestone with high stoniness, well drained. Associated with Juniperus communis, J. virginiana, Ulmus rubra, Lespedeza capitata, Monarda fistulosa, and Rhus glabra. | Wild material | Vine to 4 meters tall. | 1649454 | WLP 769 |
| 76 | Ames 26922 | 'Varen' | Betula papyrifera Marshall | North Dakota, United States | NC7 | | Not Available | 2002 | DEVELOPED | | | | | | | Superior stress tolerance based on western North Dakota source of origin. Highly bronze birch borer (Agrilus anxius Gory) resistant. Very winterhardy, native North Dakota tree (withstands -39 to -40 degrees C). Exceptional clear white bark, stems begin changing to whitish at 7-14 millimeters in diameter. Marked exfoliation of bark. Quality dark green foliage. Upright, oblong-elliptical form, becoming somewhat more oval-rounded with maturity. Excellent golden-yellow autumn foliage coloration. Good resistance to birch leaf miner (Fenusa pusilla Lepeletier) to date. Adapted to alkaline soils (pH 8.2+). | 1640438 | Ames 26922 |
| 77 | Ames 26202 | 'Lippert' | Quercus macrocarpa Michx. | Oklahoma, United States | NC7 |  | | 2001 | COLLECTED | 1970 | Stillwater City Park, Payne County. | 36.11555556, -97.05805556 | 274 | | Wild material | Released in 1994 by the USDA-ARS Natural Resource Conservation Service Manhattan Plant Materials Center in cooperation with Kansas State and Extension Forestry. Selected from a collection of 4 bur oak accessions assembled and evaluated at the Manhattan Plant Materials Center from 1972 to 1994. Selected as a superior strain on the basis of growth rate, plant vigor, form, and seedling vigor. Broad leaf, deciduous, medium-to-tall tree reaching a mature height of 100 feet. Characterized by a broad, round, open crown, corky twigs; and thick, ridged, deeply furrowed bark. Leaves are bright green above, pale beneath with a close, fine, stellate pubescence, five to nine rounded loves, deeply incised in the middle, almost in two; oblong, the terminal half broader than the basal portion. Staminate flowers are small, in clustered, pendant catkins, while pistillate flowers are solitary to few in leaf axils. Fruit is an acorn up to 2 inches long, 1/2 to entirely encloesd in a distinctive fringed cup. Multiple use species, including multi-row-windbreaks, watershed protection, and plantings for farmsteads and parks. Its acorns are consumed by white-tail deer, squirrels, wood ducks, and other animals. Tolerant of a broad spectrum of physical and chemical soil porperties, but prefers moist, deep bottomland soils, but occurs on shallow uplands in coarse soils derived of limestone and sedimentaries to bluffs and at the edge of dry prairies. While the full area of adaptation is unknown, survival and adaptation ranges from the Panhandle of Texas, to central Oklahoma, and north to Manhattan, Kansas. The potential area of adaptation includes most of Oklahoma, eastern Kansas, and eastern Nebraska. For additional information, view the 'Lippert' USDA-NRCS Brochure | 1613053 | Ames 26202 |
| 78 | NA 75184 | 1.3 | Fagus sylvatica L. | Zakarpatska, Ukraine | NA | | Not Available | 2000 | COLLECTED | 10/2000 | Carpathians (Svaliava region), near Poliana. | 48.63333333, 22.96666667 | | Natural forest. | Wild material | | 1606550 | NA 75184 |
| 79 | Ames 25492 | WSYUS 35 | Betula pendula Roth | Sumy, Ukraine | NC7 | | Not Available | 1999 | COLLECTED | 09/12/1999 | Molodetskiy. | 50.32583333, 34.67444444 | 190 | Open site which slopes to river. Full sun, 5% slope with a western exposure. Clay loam soil with good drainage. | Wild material | Plants were relatively abundant. Pyramidal tree to 10 feet. | 1586011 | Ames 25492 |
| 80 | Ames 25493 | WSYUS 43 | Betula pendula Roth | Kharkiv, Ukraine | NC7 |  | Not Available | 1999 | COLLECTED | 09/13/1999 | Halfway between Kaplunovka and Koziyevka. | 50.15000000, 35.15416667 | 200 | Open site on top of hill near several houses. 5% slope with a southeastern exposure. Clay loam soil with good drainage. | Wild material | Plants were relatively abundant. Pyramidal tree with a 10-12 inch caliper. | 1586072 | Ames 25493 |
| 81 | Ames 25499 | WSYUS 5 | Cornus mas L. | Kiev, Ukraine | NC7 |  | | 1999 | COLLECTED | 09/08/1999 | Botanical garden of the National Agricultural University, Kyiv. | 50.38305556, 30.50388889 | 140 | Along trail through the botanical garden. Partial shade, 1% slope with a northwestern exposure. Sandy loam soil with good drainage. Two L-shaped rows of Cornus mas bordered by Fagus sylvatica and Acer. | Cultivated material | Trees have an arching crown, no lower branches. | 1586016 | Ames 25499 |
| 82 | Ames 25520 | WSYUS 49 | Fraxinus excelsior L. | Kharkiv, Ukraine | NC7 | | | 1999 | COLLECTED | 09/14/1999 | 1 kilometer north of Snezhkov. | 49.80916667, 35.52055556 | 197 | Edge of natural forest, along road. Partial shade, 0-2% slope with a northeastern exposure. Clay loam soil with good drainage. | Wild material | Plants were frequently abundant. Large tree to 50 feet with a pyramidal crown. Single tree collection. Other ash in area did not develop any seed. | 1586032 | Ames 25520 |
| 83 | NA 69995 | WSYUS 70 | Carpinus betulus L. | Cherkasy, Ukraine | NA | | Not Available | 1999 | COLLECTED | 09/17/1999 | 3 km southwest of Gerezhenovka. | 48.72777778, 30.29027778 | 225 | Edge of forest along highway. 2-5% slope with a northwestern exposure. Clay loam soil with fair drainage. | Wild material | Plants were relatively abundant. Trees had broad crowns and 8-10 inch caliper. | 1586013 | NA 69995 |
| 84 | NA 70011 | WSYUS 26 | Tilia cordata Mill. | Chernihiv, Ukraine | NA | | Not Available | 1999 | COLLECTED | 09/10/1999 | Pryluky Forest Station, Pryluky. | 50.69416667, 32.43444444 | 160 | Edge of forest. Partial shade/sun, 0-1% slope with a western exposure. Sandy loam soil with good drainage. | Wild material | Plants were frequently abundant. Tree branched to the ground. | 1586063 | NA 70011 |
| 85 | WLP 760 | WSYUS 11 | Carpinus betulus L. | Kiev, Ukraine | NA | | | 1999 | COLLECTED | 09/08/1999 | Between the National Agricultural University dormitory and Forestry Building, Kyiv. | 50.38722222, 30.51111111 | 140 | Fringe of forested area. Partial shade, 0-5% slope with an eastern exposure. Sandy loam soil with good drainage. | Wild material | Plants were relatively abundant. Oval crown trees. | 1586077 | WLP 760 |
| 86 | WLP 761 | WSYUS 78 | Carpinus betulus L. | Ternopil, Ukraine | NA | | | 1999 | COLLECTED | 09/22/1999 | Traveled a road that ended in a sanitorium, parked and walked to top of mountain (hill), at entrance to Kremenets'/Feshchuki. | 50.11972222, 25.74194444 | 355 | Trees within the forest collected up the mountain. 5-10% slope with a southeastern exposure. Sandy loam soil with good drainage. | Wild material | Plants were frequently abundant. 25-30 feet high with broad crowns. | 1586014 | WLP 761 |
| 87 | Ames 25022 | 190-98P | Alnus japonica (Thunb.) Steud. | Primorye, Russian Federation | NC7 |  | | 1998 | COLLECTED | 09/14/1997 | | 44.19416667, 131.64833330 | | Flat area with wet soil on top of hill. 0 degrees of slope. | Wild material | Shrub, 6-8 feet tall. Further south it grows to tree form, 24-30 feet tall. | 1563774 | Ames 25022 |
| 88 | Ames 24594 | Ames 24594 | Prunus tenella Batsch | Moscow, Russian Federation | |  | Historic | 1998 | DONATED | 06/16/1989 | | | | | | For evaluation in NC7-trials. | 1561786 | Ames 24594 |
| 89 | Ames 25097 | Ames 25097 | Ligustrum obtusifolium Siebold & Zucc. | Iowa, United States | NC7 |  | Not Available | 1998 | DEVELOPED | PRE 08/1998 | | | | | Cultivated material | Cuttings taken from specimen of PI 477010. | 1566608 | Ames 25097 |
| 90 | Ames 25098 | Ames 25098 | Viburnum rufidulum Raf. | Iowa, United States | NC7 | | Not Available | 1998 | DONATED | 08/05/1998 | | | | | Cultivated material | | 1566609 | Ames 25098 |
| 91 | Ames 24584 | MLA 960785 | Quercus robur L. | Taldyqorghan, Kazakhstan | NC7 |  | | 1998 | COLLECTED | 1996 | Khrebet Dzhungarskiy Alatau (mountains), near Sarqan. | 45.41500000, 80.42138889 | 1480 | | Wild material | | 1558848 | Ames 24584 |
| 92 | Ames 24553 | 'Bud's Yellow' | Cornus sericea L. subsp. sericea | Manitoba, Canada | NC7 |  | | 1998 | DEVELOPED | PRE 1998 | | | | | Cultivar | Bright yellow stems and improved disease resistance make it vastly superior to older, greener cultivars. Zone 3, 6-8 feet tall, good for cut flowers or foilage, full sun to partial shade. Growth rate: will produce 1 gallon container plant in 1 growing season. | 1556799 | Ames 24553 |
| 93 | WLP 1367 | Ames 24598 | Lonicera alpigena L. | Leningradskaja oblast', Russian Federation | NA | | | 1998 | DEVELOPED | PRE 05/1995 | | | | | | Attractive deciduous shrub with large fruits (like cherries). Tight, compact, upright growth habit. Fairly dark, shiny leaves. Appears to be best suited for more northern climates (New England, Upper Midwest, Great Basin). Potential ornamental plant. May be invasive. | 1553758 | WLP 1367 |
| 94 | Ames 24144 | 'Garden City' | Ulmus parvifolia Jacq. | Kansas, United States | NC7 | | Not Available | 1998 | DONATED | 01/20/1998 | | | | | Cultivar | | 1553043 | Ames 24144 |
| 95 | NA 69561 | Ames 24077 | Cercidiphyllum magnificum (Nakai) Nakai | Trøndelag, Norway | NA | | Not Available | 1997 | DONATED | 02/26/1997 | | | | | Uncertain improvement status | | 1549982 | NA 69561 |
| 96 | WLP 937 | Index Seminum 1241 | Cotoneaster shansiensis J. Fryer & B. Hylmö | Kiev, Ukraine | NA |  | | 1996 | DONATED | 05/09/1996 | | | | | Cultivated material | | 1522283 | WLP 937 |
| 97 | NA 64776 | WD009 | Catalpa bungei C. A. Mey. | Hubei Sheng, China | NA | | | 1994 | COLLECTED | 09/12/1994 | Near Guan Shan | 32.35444444, 110.86805556 | | Growing in an agricultural field. Southeast facing slope. Growing with Cedrela sinensis, Quercus serrata, Paulownia sp., Juniperus formosana. | Wild material | | 1501748 | NA 64776 |
| 98 | Ames 21668 | Royal Guard | Viburnum rufidulum Raf. | Ohio, United States | NC7 | | Not Available | 1993 | COLLECTED | | | | | | Uncertain improvement status | | 1086914 | Ames 21668 |
| 99 | Ames 19051 | AP16 | Kalopanax septemlobus (Thunb.) Koidz. | Ohio, United States | | | Historic | 1992 | DONATED | 03/31/1992 | | | | | Cultivated material | | 1082301 | Ames 19051 |
| 100 | Ames 13815 | CG88-004 | Rhus copallinum L. | Illinois, United States | | | Historic | 1990 | DEVELOPED | | | | | | Cultivated material | Originally from Iroquois County. | 1064941 | Ames 13815 |
| 101 | Ames 13833 | NA 61759 | Betula schmidtii Regel | Gangwon-do, Korea, South | NC7 | | Not Available | 1990 | COLLECTED | 10/11/1989 | Sorak-san, Sorak-dong. Path from Sorak Tourist Hotel to Temple. | 39.15000000, 128.47083333 | 480 | Growing in an open flood plain in association with Robinia, Celtis, Ulmus, Fraxinus, Lespedeza, and Rosa. | Wild material | Single stem tree, 6 meters tall, DBH 7.5 cm. Leaves yellow-green. Fruit brown, shattering. | 1065018 | Ames 13833 |
| 102 | Ames 12979 | 782U/158L | Betula lenta L. f. uber (Ashe) McAll. & Ashburner | Virginia, United States | NC7 |  | | 1990 | COLLECTED | 1982 | Smyth County approximatley 1.24 miles southeast of Sugar Grove. | 36.76666700, -81.38333300 | 840 | Floodplain of Cressy Creek. Growing in association with Betula lenta and Betula alleghaniensis. Rocky debris that is strongly acidic and very permeable | Wild material | Germplasm originally collected in nature and subsquently used for regeneration via controlled pollination. This accession represents the F1 generation from a cross between a tree (782U) with the round leaf shape phenotype (homozygous for the recessive round leaf shape allele) and a tree (158L) with the ovate leaf shape phenotype (heterozygous, containing both the ovate and round leaf shape alleles). The F1 seedlings received have round leaves. In a grow out of increased seed representing an F2 generation, all progeny (116 seedlings) had the round leaf phenotype. | 1062065 | Ames 12979 |
| 103 | Ames 12981 | 782U/370U | Betula lenta L. f. uber (Ashe) McAll. & Ashburner | Virginia, United States | NC7 |  | | 1990 | COLLECTED | 1982 | Smyth County approximatley 1.24 miles southeast of Sugar Grove. | 36.76666700, -81.38333300 | 840 | Floodplain of Cressy Creek. Growing in association with Betula lenta and Betula alleghaniensis. Rocky debris that is strongly acidic and very permeable | Wild material | Germplasm originally collected in nature and subsquently used for regeneration via controlled pollination. This accession represents the F1 generation from a cross between two trees (782U and 370U) with the round leaf shape phenotype (homozygous for the recessive round leaf shape allele). In a grow out of increased seed representing an F2 generation, all progeny (115 seedlings) had the round leaf phenotype. | 1062072 | Ames 12981 |
| 104 | Ames 12674 | Ames 12674 | Sorbaria tomentosa (Lindl.) Rehder | Uzbekistan | NC7 |  | | 1989 | COLLECTED | | | | | | | Seed from Tashkent. Received through National Clonal Germplasm Repository, Corvallis, OR. | 1061104 | Ames 12674 |
| 105 | WLP 745 | Widrlechner 175 | Celtis reticulata Torr. | New Mexico, United States | NA | | | 1988 | COLLECTED | 06/26/1988 | Rabbit Ear Mtn. Quad, T27N R35E NE 1/4 of SE 1/4 Sec. 14, north of Seneca Creek | 36.56666667, -103.16666667 | 1479 | Floodplain north of Seneca Creek, Growing just below a west-facing rock ledge. | Wild material | | 1043741 | WLP 745 |
| 106 | WLP 1919 | Index Seminum 221 | Viburnum bitchiuense Makino | Chungcheongnam-do, Korea, South | NA |  | | 1985 | COLLECTED | | Chollipo Arboretum. | | | | Cultivated material | Large, deciduous shrub. | 1028013 | WLP 1919 |
| 107 | Ames 2814 | Ames 2814 | Viburnum mongolicum (Pall.) Rehder | Manitoba, Canada | NA | | | 1984 | DONATED | 02/17/1984 | | | | | Cultivated material | Shrub, fruit black. | 1022025 | Ames 2814 |