| 0 | PI 649702 | 12 | Physocarpus opulifolius (L.) Maxim. | Iowa, United States | NC7 | | | 2003 | COLLECTED | 09/14/2003 | 100 meters south of campground at North Bear Creek, west side of Quandahl Road, Bear Creek Wildlife Area, Highlandville, NW 1/4 of SE 1/4 of Section 25, T100N, R7W, Dorchester Quad, Winneshiek County. | 43.44833333, -91.61861111 | 265 | Limestone road cut. Mostly sunny. Steep slope with an eastern aspect. Thin soil with high stoniness, well drained. | Wild material | Medium sized shrubs with arching stems. | 1649462 | PI 649702 |
| 1 | PI 649714 | 13a | Drymocallis arguta (Pursh) Rydb. | Iowa, United States | NC7 |  | | 2003 | COLLECTED | 09/14/2003 | North Bear Creek Wildlife Area near Highlandville, T100N, R7W N edge of SE 1/4 of SW 1/4 of Sec. 25, Dorchester Quad, Winneshiek County. | 43.44583333, -91.62222222 | 311 | Dolomite cliffs. Half sunny. Edge of sheer cliff with a north to northwest aspect. Rock crevices. | Wild material | | 1649464 | PI 649714 |
| 2 | PI 274040 | Ml-4902 | Securigera varia (L.) Lassen | Iowa, United States | NC7 | | | 1958 | COLLECTED | | Between Decorah and Calmar, Winneshiek County. | | | | | Plants vigorous, semiprostrate, fall recovery good, hardy, good seed producer. | 1205793 | PI 274040 |
| 3 | Ames 35919 | AS/VO/2022/066/197 | Viburnum opulus L. var. americanum Aiton | Iowa, United States | NC7 | | | 2022 | COLLECTED | 09/22/2022 | Collected from two locations (13.5 miles apart): North Bear Creek Wildlife Management Area located 1.80 miles east of Highlandville along South Bear Creek (one plant sampled) and Bluffton Fir Stand State Preserve located 9.00 miles northwest of Decorah along Upper Iowa River (two plants sampled), T100N R7W NW ¼ Sec. 35 and T99N R9W SW ¼ Sec. 10, respectively. | 43.43762000, -91.63512800 | 266 | Steep, rocky slopes and cliffs above river. | Wild material | | 2139681 | Ames 35919 |
| 4 | Ames 35601 | Ames 35601 | Blephilia hirsuta (Pursh) Benth. | Iowa, United States | NC7 |  | | 2020 | COLLECTED | 10/16/2020 | Trout Run Trail along the Upper Iowa River located on the western edge of Decorah, T98N R8W SW1/4 Sec. 16, Winneshiek County | 43.30129700, -91.79717100 | 265 | Low woods | Wild material | Leaves with a pleasant minty odor when crushed. Stems, peitoles, and leaves very pubescent. Plants in nature (northeast Iowa) peaked flower on 11 July 2020. | 2107897 | Ames 35601 |
| 5 | Ames 33357 | JDC/UT/2016/018/733 | Ulmus thomasii Sarg. | Iowa, United States | NC7 |  | | 2016 | COLLECTED | 06/03/2016 | Malanaphy Springs State Preserve just northwest of Decorah, T99N R8W SW ¼ NW ¼ SE ¼ Sec. 31 | 43.34713800, -91.83840000 | 302 | Deciduous woods. Rocky substrate. 20 degree northwest-facing slope | 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 flowering in central Iowa typically occurs the last week in April into the first week in May and 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 represents genetics from northeast Iowa (Winneshiek County). In an assessment of some of the largest Ulmus thomasii (native and cultivated) across Iowa, four of the nine largest specimens in Iowa are present in Malanaphy Springs State Preserve where this accession was sampled. The second largest U. thomasii in the state located in Malanaphy Springs was measured on 22 May 2020 with a circumference of 6.42', height of 86.58', and an average crown spread of 68.00' (180 points) (Rouw, M., personal communication, 8 February 2021). | 1940580 | Ames 33357 |
| 6 | Ames 32760 | JDC/AB/2014/040/542 | Abies balsamea (L.) Mill. | Iowa, United States | NC7 | | | 2014 | COLLECTED | 09/03/2014 | Bluffton Fir State Preserve, near Bluffton, Winneshiek County. | 43.40106767, -91.90659200 | 326 | High quality, native woods. Steep slope, northwest-facing, and relatively flat portion on top of bluff (powerline) | Wild material | | 1921308 | Ames 32760 |
| 7 | Ames 32763 | JDC/DL/2014/041/543 | Diervilla lonicera Mill. | Iowa, United States | NC7 |  | | 2014 | COLLECTED | 09/03/2014 | Bluffton Fir State Preserve near Bluffton, T99N R9W SW 1/4 SW 1/4 Sec. 10 | 43.40068700, -91.90760900 | 346 | High quality, native woods. Steep slope, northwest-facing. | Wild material | | 1921311 | Ames 32763 |
| 8 | Ames 32765 | JDC/LR/2014/037/539 | Lonicera reticulata Raf. | Iowa, United States | NC7 | | Not Available | 2014 | COLLECTED | 09/03/2014 | Approximately 1.25 miles southwest of Bluffton, Winneshiek County. | 43.38628200, -91.92384900 | 362 | Roadside. | Wild material | | 1921313 | Ames 32765 |
| 9 | Ames 31516 | JDC/CR/2012/014/407 | Cornus rugosa Lam. | Iowa, United States | NC7 |  | | 2012 | COLLECTED | 07/13/2012 | Bluffton Fir State Preserve, SW 1/4 of Section 10, T99N, R9W, Bluffton Quad, near Bluffton, Winneshiek County. | 43.41080200, -91.93845200 | 343 | Mixed hardwood forest. Very steep, northwest-facing slope. | Wild material | | 1903743 | Ames 31516 |
| 10 | Ames 29519 | JDC/CA/2008/009/079 | Cornus alternifolia L. f. | Iowa, United States | NC7 |  | Not Available | 2008 | COLLECTED | 08/03/2008 | Along 273rd Avenue, approximately 200 yards west of Highway 24, south end of Fort Atkinson, Turkey River watershed, Winneshiek County. | 43.14083333, -91.93555556 | 238 | Wooded area, small creek just north of population. 45% slope, northern aspect. 100% filtered shade. | Wild material | | 1782636 | Ames 29519 |
| 11 | Ames 27294 | 7 | Betula papyrifera Marshall | Iowa, United States | NC7 | | Not Available | 2003 | COLLECTED | 09/14/2003 | South Bear Creek Wildlife Area, Highlandville, SW 1/4 of NE 1/4 of Section 35, T100N, R7W, Highlandville Quad, Winneshiek County. | 43.43694444, -91.64833333 | 318 | Edge of field. Open, exposed, and sunny. Slight slope. | Wild material | Medium sized tree. | 1649451 | Ames 27294 |
| 12 | Ames 27301 | 10 | Juniperus communis L. | Iowa, United States | NC7 |  | Not Available | 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. | Wild material | Low shrubs covering rocks. | 1649458 | Ames 27301 |
| 13 | Ames 27308 | 13 | Dasiphora fruticosa (L.) Rydb. subsp. fruticosa | Iowa, United States | NC7 |  | | 2003 | COLLECTED | 09/14/2003 | North Bear Creek Wildlife Area, Highlandville, N edge of SE 1/4 of SW 1/4 of Section 25, T100N, R7W, Dorchester Quad, Winneshiek County. | 43.44583333, -91.62222222 | 311 | Dolomite cliffs. Half sunny. Edge of sheer cliff with a N to NW aspect. Rock crevices. | Wild material | Small shrubs, 30 to 75 cm tall. | 1649465 | Ames 27308 |
| 14 | Ames 27312 | 6 | Staphylea trifolia L. | Iowa, United States | NC7 |  | | 2003 | COLLECTED | 09/13/2003 | Malanaphy Springs State Preserve near Decorah, T99N R8W NW 1/4 of SE 1/4 and SW 1/4 of NE 1/4 of Sec. 31, Winneshiek County | 43.34888889, -91.83638889 | 293 | Along trail near spring, half shaded. Gradual slope with a northwestern aspect. Organic soil over limestone with high stoniness, well to good drainage | Wild material | Shrubs to small trees to 3 meters tall. Some plants had very large pods. | 1649469 | Ames 27312 |
| 15 | Ames 27314 | 5 | Taxus canadensis Marshall | Iowa, United States | | | Historic | 2003 | COLLECTED | 09/13/2003 | Malanaphy Springs State Preserve, northwest of Decorah, SW 1/4 of NE 1/4 of Section 31, T99N, R8W, Decorah Quad, Winneshiek County. | 43.35027778, -91.83500000 | 293 | Shaded. 25% slope with a northwestern aspect. Organic soil in eroding limestone with high stoniness, well to good drainage. Associated with black maple, elm, alternate leaved dogwood, Hepatica, and Aquilegia. | Wild material | Low shrubs to 1 meter tall making a nearly solid ground cover. | 1649471 | Ames 27314 |