| 0 | PI 663907 | 'Firefly' | Clethra alnifolia L. | Tennessee, United States | NA | | Not Available | 2011 | DEVELOPED | 09/01/2011 | | | | | Cultivar | | 1889848 | PI 663907 |
| 1 | PI 479353 | JH-261-82 | Clethra barbinervis Siebold & Zucc. | Japan | | | Historic | 1982 | COLLECTED | 10/05/1982 | te-shi,Hokkaido Arboretum, Hokk | 41.81666667, 140.80000000 | | | Cultivated material | Snow cover for 2 days by snow 50cm or deeper. Minimum temperature -18C. Tree, 3m tall, transplanted from Gabino- machi in Hakodate-shi where it was native. Seed collected from one plant. | 1374289 | PI 479353 |
| 2 | PI 316047 | | Clethra barbinervis Siebold & Zucc. | Japan | | | Historic | 1966 | COLLECTED | | | | | | | | 1707739 | PI 316047 |
| 3 | PI 287106 | | Clethra monostachya Rehder & E. H. Wilson | United Kingdom | | | Historic | 1963 | COLLECTED | | | | | | | | 1689671 | PI 287106 |
| 4 | PI 133344 | KW No. 00124 | Clethra sp. | Myanmar | | | Historic | 1939 | COLLECTED | | | | | | | | 1849845 | PI 133344 |
| 5 | PI 129266 | No. 1329 | Clethra monostachya Rehder & E. H. Wilson | Sichuan Sheng, China | | | Historic | 1938 | COLLECTED | 11/1937 | Tien Chuan Hsien | | 2300 | | | | 1845304 | PI 129266 |
| 6 | PI 104199 | | Clethra barbinervis Siebold & Zucc. | France | | | Historic | 1934 | COLLECTED | | | | | | | | 1792601 | PI 104199 |
| 7 | PI 103422 | No. D-130 | Clethra delavayi Franch. | China | | | Historic | 1933 | COLLECTED | | | | | | | | 1791758 | PI 103422 |
| 8 | PI 100862 | F. 30518 | Clethra delavayi Franch. | China | | | Historic | 1932 | COLLECTED | | | | | | | | 1788531 | PI 100862 |
| 9 | PI 100526 | F. 30956 | Clethra delavayi Franch. | China | | | Historic | 1932 | COLLECTED | | | | | | | | 1788129 | PI 100526 |
| 10 | PI 100527 | F. 30974 | Clethra delavayi Franch. | China | | | Historic | 1932 | COLLECTED | | | | | | | | 1788130 | PI 100527 |
| 11 | PI 100528 | F. 29866 | Clethra sp. | China | | | Historic | 1932 | COLLECTED | | | | | | | | 1788131 | PI 100528 |
| 12 | PI 99845 | F. 30518 | Clethra delavayi Franch. | China | | | Historic | 1932 | COLLECTED | | | | | | | | 1787161 | PI 99845 |
| 13 | PI 78372 | | Clethra delavayi Franch. | England, United Kingdom | | | Historic | 1928 | COLLECTED | | | | | | | | 1496096 | PI 78372 |
| 14 | PI 43834 | | Clethra barbinervis Siebold & Zucc. | Massachusetts, United States | | | Historic | 1916 | COLLECTED | | | | | | | | 1608514 | PI 43834 |
| 15 | PI 40066 | | Clethra barbinervis Siebold & Zucc. | Japan | | | Historic | 1915 | COLLECTED | | | | | | | | 1508747 | PI 40066 |
| 16 | PI 30759 | | Clethra arborea Aiton | Scotland, United Kingdom | | | Historic | 1911 | COLLECTED | | | | | | | | 1596531 | PI 30759 |
| 17 | PI 10732 | | Clethra arborea Aiton | Canarias, Spain | | | Historic | 1904 | COLLECTED | | | | | | | | 1553749 | PI 10732 |
| 18 | PI 1589 | | Clethra arborea Aiton | France | | | Historic | 1898 | COLLECTED | | | | | | | | 1534043 | PI 1589 |
| 19 | NA 88937 | 24Flam55 | Clethra alnifolia L. | Georgia, United States | NA | | | 2025 | COLLECTED | 09/12/2025 | Clyo, GA: Metzger Farm, on a shelf above Savannah River. GPS points are a general location for the population, not individual plants [note: collections were combined into this USNA accession.] | 32.49317000, -81.22832000 | 50 | Wet woods on a steep, steep shelf above Savannah River. Growing in 3/4 shade. Slope: 45 to 60 degrees. Aspect: Northeast. | Wild material | | 2172820 | NA 88937 |
| 20 | NA 87719 | NA 87719 | Clethra alnifolia L. | | NA | | Not Available | 2024 | | | | | | | Cultivated material | Original source of plants, and any cultivar identity, are unknown at the time of accessioning. | 2169665 | NA 87719 |
| 21 | WLP 3433 | RM2023-002 | Clethra acuminata Michx. | Georgia, United States | NA | | | 2024 | COLLECTED | 10/21/2023 | Plants growing along Patterson Gap Road. | 34.97299200, -83.46003100 | 789 | Plants growing in part shade in a very dry and rocky, mostly deciduous habitat. The site is steeply sloped, underlain by rock, with rocky outcrops. Slope: 15 percent. Aspect: Variable. The underlying geology of this area is Biotite Gneiss, primarily of Precambrian-Paleozoic origin. (Source: USGS North Carolina Geologic Map Data.) The primary soil type in the collection area is classified as Tusquitee loam, 10 to 25 percent slopes. The Tusquitee series consists of very deep, well drained soils on gently sloping to very steep benches, foot slopes, toe slopes, and fans in coves in the Southern Blue Ridge mountains, MLRA 130B. These soils formed in colluvium derived from materials weathered from igneous and high-grade metamorphic crystalline rocks such as granite, mica gneiss, hornblende gneiss, and schist. Slope ranges from 2 to 95 percent. The surface layer to 5cm deep is comprised of moderately decomposed organic matter and leaves, twigs, and roots. Layers to 2m deep range from very dark grayish brown to brown sandy loam with weak medium and coarse granular structure that is friable. A few fine flakes of mica can be found and these soils are very strongly acid. (Source: NRCS Web Soil Survey.) | Wild material | | 2166142 | WLP 3433 |
| 22 | NA 88844 | RJL-RM2023FLAL-018 | Clethra alnifolia L. | Florida, United States | NA | | | 2023 | COLLECTED | 12/13/2023 | Yellow River Water Management Area, accessed off of Old River Road by vehicle on an unmaintained sand road for approximately 1.68 kilometers. Upon reaching the destination, plants are accessed by foot along unmaintained trail to the east. | 30.83495500, -86.62005400 | 27 | Plants are growing primarily in part shade as understory shrubs in mixed evergreen and deciduous, moist to wet, acidic woodlands. Plants form large colonies and appear to have been subjected to prescribed fire in recent years. Slope: 10 to 15 percent. Aspect: Northeast. The underlying geology of this area is the Citronelle Formation of Pliocene origin and consists of gray to orange, often mottled, unconsolidated to poorly consolidated, very fine to very coarse, poorly sorted, clean to clayey sands. It contains significant amounts of clay, silt and gravel which may occur as beds and lenses and may vary considerably over short distances. Limonite nodules and limonite-cemented beds are common. (Source: USGS Florida Geologic Map Data.) The soil profile for this area is classified as the Bonifay Soil Series. Bonifay soil consists of very deep, well drained, moderately slowly permeable soils on ridges and side slopes in the Southern Coastal Plain. They formed in thick beds of sandy and loamy marine sediments. Solum thickness ranges from 1.5-2.0 m. Soil reaction ranges from very strongly acid to moderately acid throughout, except where the surface has been limed. Ironstone pebbles, 2 to 15 mm in size, range from 0 to 5 percent, by volume. Depth to the plinthic horizon ranges from 1.1-1.7 m. Some horizons contain up to 25 percent plinthite by volume. (Source: NRCS Web Soil Survey.) | Wild material | | 2165674 | NA 88844 |
| 23 | NA 88693 | RJL2023NJ-006 | Clethra alnifolia L. | New Jersey, United States | NA | | | 2023 | COLLECTED | 11/10/2023 | Franklin Township: Piney Hollow Preservation Area (the site is owned by Franklin Township). Plants accessed by foot along trails throughout property. | 39.57319800, -74.92908900 | 29 | Plants growing in shade to part-shade over a wide range of habitats from mesic to mesic-dry as well as moist to wetland habitats. The woodlands are mostly deciduous, but also include occasional pine overstory. Slope: N/A. Aspect: N/A. The underlying geology of this area is of Middle Miocene, Serravallian origin and characterized as an Cohansey Formation. It is comprised of sand, white to yellow with local gravel and clay. Locally stained red or orange brown by iron oxides and (or) cemented into large blocks of ironstone. Unweathered clay is typically dark gray, but commonly weathers white where interbedded with thin beds of ironstone. Unit is a complex of interfingering marine and nonmarine facies. Sand is typically medium grained and moderately sorted although it ranges from fine to very coarse grained and from poorly to well sorted. Sand consists of quartz and siliceous rock fragments. Some beds are locally micaceous. In general, the sand is crossbedded, although the style of crossbedding varies significantly with the paleoenvironment. Trough crossbedding predominates, especially in the nonmarine channel fill deposits, and the scale of the crossbeds varies from small to large. Maximum thickness in the map area is about 60 m; however, thickness is difficult to determine because of the irregular basal contact and extensive post-depositional erosion. There is as much as 18 m of relief along the basal contact. The basal contact is sharp, undulatory, and directly overlain by a thin gravel bed. The Cohansey Formation unconformably overlies the Kirkwood Formation and is found in channels cut down into the Kirkwood. Where the Kirkwood consists of sandy, light-colored sediments, the basal contact of the Cohansey is drawn below crossbedded sediments. Where the Kirkwood consists of dark-colored silty beds, the basal contact is drawn between light-colored Cohansey sediments and the underlying dark-colored sediments. The Cohansey was markedly thinned because of erosion prior to deposition of overlying units in the western and southern parts of the southern sheet. The unit has been extensively eroded and stripped from large areas of the New Jersey Coastal Plain, particularly in the central sheet where outliers are common. In spite of its widespread nature, the Cohansey is poorly exposed because of its loose sandy composition, which causes it to erode easily. (Source: USGS New Jersey Geologic Map Data.) The primary soil types in the area of this collection is classified as Atsion sand, 0 to 2 percent slopes, Northern Tidewater Area and Downer loamy sand, 0 to 5 percent slopes, Northern Coastal Plain. Atsion Series soils are very deep, poorly drained with moderate to rapid permeability above 70 cm and slower beneath. They are classified as sandy, siliceous, mesic Aeric Alaquods. The upper stratum from 0 to 25 cm is dark gray sand, dry, single grained and lose with many fine roots. It is extremely acid. Lower strata are light gray to dark brown with small percentages of rounded quartzose pebbles and are extremely acid. Downer Series soils are very deep, well-drained soils that are coarse-loamy, siliceous, semiactive, mesic Typic Hapludults. The upper stratum of Downer Series from 0 to 25 cm is dark grayish brown, brown loamy sand that is dry with weak fine granular structure. It is very friable and strongly acid. Lower strata from 25 to 76 cm are yellowish brown single grain, loose loamy sand with few extremely weakly cemented masses of oxidized iron in the lower part. This layer is very strongly acid. (Source: NRCS Web Soil Survey.) | Wild material | | 2159121 | NA 88693 |
| 24 | NA 88700 | RJL2023NCSC-005 | Clethra alnifolia L. | North Carolina, United States | NA | | | 2023 | COLLECTED | 11/13/2023 | Sandhills Game Land: north side of Pulpwood Road approximately 0.11 km southwest of the junction with Tyner Road. | 34.96008500, -79.48751100 | 108 | Plants growing in shade to part-shade as well as sun (when moisture is abundant) of a spring fed wetland that is comprised of a mixed evergreen and deciduous woodland habitat. Slope: 3 to 10 percent. Aspect: Various. : The underlying geology of this area is of Cretaceous origin and characterized as Middendorf Formation. It is characterized by sand, sandstone, and mudstone, gray to pale gray with an orange cast, mottled; clay balls and iron-cemented concretions common, beds laterally discontinuous, cross-bedding common. (Source: USGS North Carolina Geologic Map Data.) The primary soil type in the area of this collection is classified as Pelion loamy sand, 6 to 10 percent slopes. Pelion Series soils are very deep, moderately well-drained soils with moderately slow to slow permeability. The upper 30 cm of the strata is sandy loam to sandy clay loam ranging from grayish brown to reddish yellow. This stratum has a weak fine granular structure and is very friable. It contains many fine roots and is moderately acid. Deeper strata to 2 m range from yellow to yellowish red sandy clay, often with masses of oxidized iron and few fine prominent light gray iron depletions; they are strongly acid. (Source: NRCS Web Soil Survey.) | Wild material | | 2159128 | NA 88700 |
| 25 | NA 88687 | TJK2023FL-034 | Clethra alnifolia L. | Florida, United States | NA | | | 2023 | COLLECTED | 11/18/2023 | Navarre, Florida: Adams St. cul-de-sac, on nine-acre private property. Infrastructure development began and was terminated due to the lack of any engineering or environmental site planning (designated wetland status). It has remained idle for a number of years. | 30.41000000, -86.92890000 | 11 | Wet Pine Flatwood transitioning to a shrub bog habitat under fire suppression. Slope: less than 2%. Aspect: North. Elevation: 36 feet. | Wild material | | 2159099 | NA 88687 |
| 26 | NA 88616 | KY23-020 | Clethra acuminata Michx. | Kentucky, United States | NA | | | 2023 | COLLECTED | 09/09/2023 | Kingdom Come State Park, Pine Mountain. | 36.99160000, -82.98471000 | 712 | Elevation: 2337 feet. Aspect: South. | Wild material | | 2158708 | NA 88616 |
| 27 | NA 88623 | KY23-026 | Clethra acuminata Michx. | Kentucky, United States | NA | | | 2023 | COLLECTED | 09/10/2023 | The Gulf - Natural Arch Scenic Area Panoramic Trail. | 36.84415000, -84.52840000 | 395 | Ridgeline. Elevation: 1295 feet. Aspect: South. | Wild material | | 2158715 | NA 88623 |
| 28 | NA 84409 | NA 84409 | Clethra alnifolia L. | | NA | | Not Available | 2023 | | | | | | | Uncertain improvement status | Full name as recorded at U.S. National Arboretum: Clethra alnifolia. Plant or plants growing in Fern Valley bed FV-R2. Form received: unknown propagule type. | 2153586 | NA 84409 |
| 29 | NA 82688 | (pink selection) | Clethra alnifolia L. | | NA | | Not Available | 2023 | | | | | | | Uncertain improvement status | Full name as recorded at U.S. National Arboretum: Clethra alnifolia (pink selection). Single plant of uncertain identity and origin growing in bed FV-R6 at time of accessioning, not far from the boundary of FV-02 (near a Corylus americana). Plant with good, non-fading light/medium pink petals, rather large individual florets; seems to be distinct from other named pink clones at the Arboretum at time of accessioning. Could be old NA 33019, received as C. alnifolia f. rosea from Princeton Nurseries, but that is a very uncertain possibility and plant does not match modern references to 'Rosea' as it is a much better pink. Joan recalls that the plant was there when she started and that she believes it used to have a label indicating that it was a pink form. Of possible interest in the search for material of the original USNA introduction 'Pinkspire', but any connection to that cultivar is highly speculative and doubtful at this point. -SBL Form received: unknown propagule type. | 2153007 | NA 82688 |
| 30 | NA 82345 | NA 82345 | Clethra alnifolia L. | | NA | | Not Available | 2023 | | | | | | | Uncertain improvement status | Full name as recorded at U.S. National Arboretum: Clethra alnifolia. Number may be applied to unknown-source Clethra alnifolia in various locations, but initially created for plants in bed FV-03 in Fern Valley. Plants in place before 1987. Form received: existing plant. | 2152890 | NA 82345 |
| 31 | NA 63160 | NA 63160 | Clethra alnifolia L. | | NA | | Not Available | 2023 | | | | | | | Uncertain improvement status | Full name as recorded at U.S. National Arboretum: Clethra alnifolia. Old USNA plants in Fern Valley. Three plants alive at time of accessioning. Form received: unknown propagule type. | 2147071 | NA 63160 |
| 32 | NA 88539 | RJLSEUS2022-011 | Clethra tomentosa Lam. | Georgia, United States | NA | | | 2023 | COLLECTED | 12/08/2022 | Plants growing in the upper edges of a wetland in Longleaf pine forest on the north side of Old GA State Route 33, approximately 2.11 kilometers southwest of the junction with GA Hwy 33. Common at this site on the margins of the wetland community. | 31.42763000, -83.85190700 | 108 | Plants are growing in part-shade of a Longleaf pine forest along the upper edges of a wetland community. Soils range seasonally from moist to mucky with occasional standing water in depressions.
Soils: The underlying geology of this area is of Neogene origin and characterized as Neogene Undifferentiated. It includes poorly sorted clayey sand and gravel deposited in a fluvial environment in South Carolina but becoming more fluvio-marine in Georgia. Unit is characterized by in situ weathered feldspar and an abundance of quartzite gravel and cobbles.
Source: USGS Georgia Geologic Map Data (https://mrdata.usgs.gov/geology/state/sgmc-unit.php?unit=GANu%3B1)
The primary soil types in the collection area are classified as Pelham Loamy Sand soil (0 to 2 percent slopes). The Pelham Series consists of very deep, poorly drained, moderately permeable soils that formed in unconsolidated Coastal Plain sediments. These soils are on nearly level broad flats, toe slopes, depressions and drainageways. Slopes range from 0 to 5 percent. These soils are comprised of loamy sands that are friable to a depth of approximately 1 meter and sandy clay loam to a depth in the lower strata to about 2 meters. They are also strongly acid.
Source: NRCS Web Soil Survey (https://websoilsurvey.sc.egov.usda.gov/App/WebSoilSurvey.aspx) | Wild material | | 2140766 | NA 88539 |
| 33 | NA 89033 | RJL2022MD-010 | Clethra alnifolia L. | Maryland, United States | NA | | | 2022 | COLLECTED | 09/15/2022 | Plants growing in low woodlands at the end of Greenway Avenue near a boat dock that leads to the Pocomoke River, adjacent to Winter Quarters Golf Course, Pocomoke City. Plants common throughout the wetland area as well as mesic edges of the woodlands. | 38.08305100, -75.56527800 | | Plants growing in the flood plain of the Pocomoke River in shade to part sun of a mixed deciduous and evergreen bottomland habitat about 10 meters from the edge of the golf course fairway. The habitat is a mucky swamp edge habitat next to the Pocomoke River, most of which seems wet year-round and grades slightly upslope to more mesic conditions.
The underlying geology of this area is comprised of Quaternary Deposits of Wisconsin to Holocene origin. The composition is primarily undifferentiated gray to buff sand and gravel, gray to brown lignitic silt and clay, occasional boulders, and rare shell beds. Surficial deposits occur as shell-bearing estuarine clays and silts.
Source: USGS Maryland Geologic Map Data https://mrdata.usgs.gov/geology/state/sgmc-unit.php?unit=MDQdu%3B5
The surface soil profile of this habitat is classified as Puckum Muck which is frequently flooded. These highly saturated soils are found in flats, depressions and swales. The soil reaction of Puckum Muck is extremely acid to strongly acid throughout the profile. The depth to bedrock is generally greater than 150 cm. Wood fragments comprise 0-25%, by volume of the Puckum Muck throughout the profile which includes mostly twigs, branches, logs, or stumps and are 1.5-30 cm in diameter. The composition of these highly saturated soils, are classified as muck (sapric soil material) or mucky peat (hemic soil material) throughout most of the upper 150 cm and may contain thin layers of mucky silt loam, silty clay loam, sandy loam and/or sand.
Source: NRCS Web Soil Survey (https://websoilsurvey.sc.egov.usda.gov/App/WebSoilSurvey.aspx) | Wild material | | 2139598 | NA 89033 |
| 34 | NA 88483 | RJL2022MD-004 | Clethra alnifolia L. | Maryland, United States | NA | | | 2022 | COLLECTED | 09/04/2022 | Plants growing at Elkton State Forest along roads and woodlands over a distance of approximately 5 kilometers labelled as the address of 717 Irishtown Rd, North East, MD 21901. Plants are found regularly but scattered along the unnamed gravel road as well as in open understory of the upland woodlands. | 39.58531200, -75.89566100 | 47 | Plants are growing in a mesic to moist, well-drained habitat of mixed deciduous and evergreen woodlands comprised primarily of acid-loving plants. Plants are growing in part shade and open understory shade. The soils in the collection area are generally described as a complex series of fluviomarine deposits. The soils range from a thin loam layer at the surface to varying levels of loam to sandy loam and/or extremely gravelly sandy clay loam strata, depending upon geographical location (ie. Hillslope summits, slopes, footslopes, swales, etc.). The primary soil types in the collection area are classified as Russett-Christiana-Hambrook Complex and/or Sassafras and Croom Soils; though, others may intersect and overlay in specific areas. | Wild material | | 2139362 | NA 88483 |
| 35 | NA 88302 | NEWFS-848 | Clethra alnifolia L. | Massachusetts, United States | NA | | | 2021 | | | | | | | Wild material | Erect inflorescence with spherical fruits whorled and aligned in straight rows. | 2138885 | NA 88302 |
| 36 | NA 88303 | NEWFS-872 | Clethra alnifolia L. | Massachusetts, United States | NA | | | 2021 | | | | | | | Wild material | Inflorescence erect out of leaves arranged like a candle holder. Fruits aligned in whorled parallel lines on inflorescence. | 2138905 | NA 88303 |
| 37 | NA 88304 | NEWFS-919 | Clethra alnifolia L. | Massachusetts, United States | NA | | | 2021 | | | | | | | Wild material | Dehiscent round capsules on long characteristic spike with long peduncles and often with a persistent style leaves gently serrated simple in an offset whorl below the inflorescence Last yeas seed head usually retained on adult plants. | 2138939 | NA 88304 |
| 38 | NA 88305 | NEWFS-936 | Clethra alnifolia L. | Rhode Island, United States | NA | | | 2021 | | | | | | | Wild material | Erect inflorescence with spherical fruits whorled and aligned in straight rows. | 2138956 | NA 88305 |
| 39 | NA 88306 | NEWFS-902 | Clethra alnifolia L. | Rhode Island, United States | NA | | | 2021 | | | | | | | Wild material | Termil erect white inflorescence with parallel whorls of globular fruit. | 2138925 | NA 88306 |
| 40 | NA 88307 | NEWFS-921 | Clethra alnifolia L. | Connecticut, United States | NA | | | 2021 | | | | | | | Wild material | Dehiscent round capsules on long characteristic spike with long peduncles and often with a persistent style. Leaves gently serrated. Ssimple flower scent said to be reminiscent of cough syrup. | 2138941 | NA 88307 |
| 41 | NA 88301 | NCBG-753 | Clethra alnifolia L. | North Carolina, United States | NA | | | 2021 | | | | | | | Wild material | | 2132950 | NA 88301 |
| 42 | NA 88298 | NEWFS-570 | Clethra alnifolia L. | Connecticut, United States | NA | | | 2021 | | | | | | | Wild material | | 2115704 | NA 88298 |
| 43 | NA 88300 | NEWFS-544 | Clethra alnifolia L. | Massachusetts, United States | NA | | | 2021 | | | | | | | Wild material | | 2115691 | NA 88300 |
| 44 | NA 88299 | MARSB-768 | Clethra alnifolia L. | New Jersey, United States | NA | | | 2021 | | | | | | | Wild material | Growth formûthe plant is a shrub (i.e., a woody plant with several stems growing from the base)ûLeaf typeûthe leaf blade is simple (i.e., lobed or unlobed but not separated into leaflets)ûLeaves per nodeûthere is one leaf per node along the stemûLeaf blade edgesûthe edge of the leaf blade has teethûLeaf durationûthe leaves drop off in winter (or they wither but persist on the plant)ûarmature on plantûthe plant does not have spines, prickles, or thornsûLeaf blade lengthû35–100 mmûLeaf blade widthû20–55 mmûLeaf stalkûthe leaves have leaf stalksûFruit type (general)ûthe fruit is dry and splits open when ripeûBark textureûthe bark of an adult plant is thin and smoothûTwig winter colorûbrownûgrayûBud scale numberûthere are no scales on the winter buds | 2113613 | NA 88299 |
| 45 | NA 88996 | (open-pollinated seed of NA 81114) | Clethra alnifolia L. | | NA | | | 2021 | | | | | | | Cultivated material | Open-pollinated seed of NA 81114 growing at South Farm, collected in 2021. From the record of the parent accession, NA 81114: "Cuttings obtained from a supposed original introduction (second distribution) of Clethra alnifolia 'Pinkspire', bred and selected from seedling lot NA 26887 by O. M. Freeman at the U.S. National Arboretum. From OP seed of NA 7779 (C. alnifolia 'Darlington', acquired from Coville and possibly from Elizabeth White of New Jersey) growing near another pinkish-flowered selection (possibly NA 7781); per Freeman letter no white-flowered clones were present on the grounds at that time. Seed produced in 1939 germinated in 1940, and one outstanding, non-fading pink clone was selected and named 'Pinkspire'. PI book record: "190213. Clethra alnifolia. From Washington, D.C. Cuttings obtained from the National Arboretum. Received August 16, 1950. Pinkspire." This introduction was never accessioned before, so NA 81114 will serve as the original NA accession of this USNA introduction. [IMPORTANT NOTE: Upon flowering, it was evident that this is not 'Pinkspire'; the flowers are entirely white with no trace of pink. Either the accession was mislabeled at the point of origin or it had somehow sported to an all-white version. Removing references to PI number and other numbers associated with the original clone.]" | 2191309 | NA 88996 |
| 46 | WLP 7 | NCTN06 | Clethra acuminata Michx. | North Carolina, United States | NA | | Not Available | 2020 | COLLECTED | 09/15/2019 | Clay County; Buck Creek, Nantahala NF along west side of Buck Creek Rd. | 35.08303000, -83.61620000 | 1006 | Appalachian serpentine woodland; northeast facing | Wild material | | 2109409 | WLP 7 |
| 47 | NA 88155 | NCBG-324 | Clethra alnifolia L. | North Carolina, United States | NA |  | | 2019 | | | | | | | Wild material | | 2098415 | NA 88155 |
| 48 | NA 88135 | NEWFS-625 | Clethra alnifolia L. | Rhode Island, United States | NA |  | | 2019 | | | | | | | Wild material | | 2098238 | NA 88135 |
| 49 | NA 88134 | NEWFS-595 | Clethra alnifolia L. | Massachusetts, United States | NA |  | | 2019 | | | | | | | Wild material | | 2098235 | NA 88134 |
| 50 | NA 88131 | NEWFS-244 | Clethra alnifolia L. | Massachusetts, United States | NA |  | | 2019 | | | | | | | Wild material | | 2098172 | NA 88131 |
| 51 | NA 88105 | MARSB-406 | Clethra alnifolia L. | New York, United States | NA |  | | 2019 | | | | | | | Wild material | | 2097617 | NA 88105 |
| 52 | NA 88108 | MARSB-422 | Clethra alnifolia L. | New Jersey, United States | NA |  | | 2019 | | | | | | | Wild material | | 2097625 | NA 88108 |
| 53 | WLP 174 | NACPEC19-076 | Clethra acuminata Michx. | Georgia, United States | NA | | | 2019 | COLLECTED | 09/17/2019 | Rabun County; Chattahoochee-Oconee National Forest: Chattooga River Trail approximately 1/2 mile down trail from parking lot (off of Highway 76); Township unicorporated | 34.81757600, -83.30720600 | 423 | Trail edge, steep slope, 400 feet up the slope on West bank (Georgia side): Mixed mesophytic Maple-Hickory-Oak woodland | Wild material | | 2110488 | WLP 174 |
| 54 | NA 88061 | NEWFS-216 | Clethra alnifolia L. | Massachusetts, United States | NA |  | | 2019 | | | | | | | Wild material | | 1976180 | NA 88061 |
| 55 | NA 88062 | NEWFS-233 | Clethra alnifolia L. | Massachusetts, United States | NA |  | | 2019 | | | | | | | Wild material | | 1976185 | NA 88062 |
| 56 | NA 88063 | NEWFS-247 | Clethra alnifolia L. | Massachusetts, United States | NA |  | | 2019 | | | | | | | Wild material | | 1976188 | NA 88063 |
| 57 | NA 88064 | NEWFS-251 | Clethra alnifolia L. | Massachusetts, United States | NA |  | | 2019 | | | | | | | Wild material | | 1976190 | NA 88064 |
| 58 | NA 88069 | NEWFS-604 | Clethra alnifolia L. | Massachusetts, United States | NA |  | | 2019 | | | | | | | Wild material | | 1976297 | NA 88069 |
| 59 | NA 88071 | NEWFS-610 | Clethra alnifolia L. | Connecticut, United States | NA |  | | 2019 | | | | | | | Wild material | | 1976301 | NA 88071 |
| 60 | NA 88084 | NEWFS-879 | Clethra alnifolia L. | Massachusetts, United States | NA |  | | 2019 | | | | | | | Wild material | | 1976362 | NA 88084 |
| 61 | WLP 1132 | PCC18-HON-004 | Clethra barbinervis Siebold & Zucc. | Honshu, Japan | NA | | | 2018 | COLLECTED | 09/14/2018 | Tochigi Prefecture, Shioya-gun; Shioya-machi; Funyu Forest - Utsunomiya University Forest. | 36.78213000, 139.82423000 | 400 | Mesic forest dominated by Pinus densiflora, Tsuga sieboldii, and occasional deciduous trees; top of north-south ridge above a hinoki (Chamaecyparis obtusa) plantation; south edge of collecting site with a large canopy gap. Soil A horizon light tan, clayey; lots of organic matter. | | Seed collected from four plants; three herbarium vouchers collected; photographed. | 2108910 | WLP 1132 |
| 62 | WLP 1127 | GF2018-02 | Clethra alnifolia L. | North Carolina, United States | NA | | Not Available | 2018 | COLLECTED | 11/05/2018 | Johnston County; ; Flower Hill Nature Preserve, 0.1 miles south of NC 231, trail starts behind sign, ca 750 feet east along trail. | 35.72765000, -78.20570000 | 67 | Rich mesic forest along the north-facing ridges. | | | 2108884 | WLP 1127 |
| 63 | WLP 1129 | GF2018-08 | Clethra tomentosa Lam. | Florida, United States | NA | | Not Available | 2018 | COLLECTED | 11/08/2018 | Liberty County; ; Apalachicola National Forest, 500 feet north of National Forest Rd 112, 0.2 miles west of Hwy 65. | 30.21879000, -84.89690000 | 18 | Swampy area. | | | 2108890 | WLP 1129 |
| 64 | NA 88025 | NCBG-333 | Clethra alnifolia L. | Virginia, United States | NA |  | | 2018 | | | | | | | Wild material | | 1965914 | NA 88025 |
| 65 | NA 88036 | NCBG-632 | Clethra alnifolia L. | Maryland, United States | NA |  | | 2018 | | | | | | | Wild material | | 1965997 | NA 88036 |
| 66 | NA 88004 | MARSB-737 | Clethra alnifolia L. | New York, United States | NA |  | | 2018 | | | | | | | Wild material | | 1964838 | NA 88004 |
| 67 | NA 88005 | MARSB-739 | Clethra alnifolia L. | New York, United States | NA |  | | 2018 | | | | | | | Wild material | | 1964839 | NA 88005 |
| 68 | NA 88006 | MARSB-740 | Clethra alnifolia L. | New York, United States | NA |  | | 2018 | | | | | | | Wild material | | 1964840 | NA 88006 |
| 69 | NA 87960 | NEWFS-239 | Clethra alnifolia L. | Connecticut, United States | NA |  | | 2017 | | | | | | | Wild material | | 1954705 | NA 87960 |
| 70 | NA 87961 | NEWFS-242 | Clethra alnifolia L. | Connecticut, United States | NA |  | | 2017 | | | | | | | Wild material | | 1954706 | NA 87961 |
| 71 | WLP 113 | NA 84117 | Clethra acuminata Michx. | North Carolina, United States | NA | | Not Available | 2016 | COLLECTED | 09/26/2016 | Southern Highlands Reserve, naturally occuring in wooded area. | 35.13693000, -82.97706000 | 1263 | Mixed deciduous forest; fairly open canopy. Growing in 1/4-1/2 shade. | | | 1950253 | WLP 113 |
| 72 | NA 83904 | NA 83904 | Clethra acuminata Michx. | Kentucky, United States | NA | | | 2016 | COLLECTED | 09/27/2016 | Daniel Boone National Forest, Forest Service Road 828/Route 927, Panoramic View Trail #528. | 36.84200000, -84.52900000 | 390 | Ridgetop trail. | Wild material | | 1952034 | NA 83904 |
| 73 | WLP 872 | NA 83949 | Clethra acuminata Michx. | Kentucky, United States | NA | | | 2016 | COLLECTED | 09/29/2016 | Kentenia State Forest, Pine Mountain, on Route 1679, south side. | 36.91500000, -83.25900000 | 760 | Roadside. | | | 1951703 | WLP 872 |
| 74 | NA 81711 | NA 81711 | Clethra alnifolia L. | Maryland, United States | NA | | Not Available | 2013 | COLLECTED | 12/05/2013 | Cedarville State Forest near Brandywine/Waldorf, MD, Cedarville Pond. | | 49 | Along northeast and southeast sides of pond and in swampy areas under deciduous canopy. | | | 1952567 | NA 81711 |
| 75 | NA 81331 | NA 81331 | Clethra alnifolia L. | | NA | | Not Available | 2013 | | | | | | | | | 1952959 | NA 81331 |
| 76 | NA 81131 | NA 81131 | Clethra alnifolia L. | Maryland, United States | NA | | Not Available | 2012 | COLLECTED | 07/26/2012 | Adkins Arboretum | 38.95571000, -75.94145000 | | Deciduous forest, coastal plain | | | 1953596 | NA 81131 |
| 77 | NA 81132 | NA 81132 | Clethra alnifolia L. | Maryland, United States | NA | | Not Available | 2012 | COLLECTED | 07/26/2012 | Adkins Arboretum | 38.95317000, -75.94247000 | | Deciduous forest, coastal plain - edge of seasonal swamp, was once open water | | | 1952678 | NA 81132 |
| 78 | NA 81133 | NA 81133 | Clethra alnifolia L. | Maryland, United States | NA | | Not Available | 2012 | COLLECTED | 07/26/2012 | Adkins Arboretum | 38.95332000, -75.94173000 | | Deciduous forest, coastal plain - more upland than previous two collections | | | 1953439 | NA 81133 |
| 79 | NA 81136 | NA 81136 | Clethra alnifolia L. | Maryland, United States | NA | | Not Available | 2012 | COLLECTED | 07/26/2012 | Adkins Arboretum | 38.94801000, -75.94204000 | | Deciduous forest, coastal plain | | | 1951336 | NA 81136 |
| 80 | NA 57149 | 'Issai' | Clethra barbinervis Siebold & Zucc. | | NA | | Not Available | 2012 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Clethra barbinervis 'Issai'. From cuttings of NA 57149-CP, propagated in 2012. [This is all but certainly the same selection called 'Issai' elsewhere; the distinguishing features are typically associated with cultivars of this name. -SBL] | 2146296 | NA 57149 |
| 81 | NA 80896 | 'Ruby Spice' | Clethra alnifolia L. | | NA | | Not Available | 2012 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Clethra alnifolia 'Ruby Spice'. | 2152292 | NA 80896 |
| 82 | NA 81114 | Wash. Park. 334-55 | Clethra alnifolia L. | | NA | | Not Available | 2011 | | | | | | | Clone | Cuttings obtained from a supposed original introduction (second distribution) of Clethra alnifolia 'Pinkspire', bred and selected from seedling lot NA 26887 by O. M. Freeman at the U.S. National Arboretum. From OP seed of NA 7779 (C. alnifolia 'Darlington', acquired from Coville and possibly from Elizabeth White of New Jersey) growing near another pinkish-flowered selection (possibly NA 7781); per Freeman letter no white-flowered clones were present on the grounds at that time. Seed produced in 1939 germinated in 1940, and one outstanding, non-fading pink clone was selected and named 'Pinkspire'. PI book record: "190213. Clethra alnifolia. From Washington, D.C. Cuttings obtained from the National Arboretum. Received August 16, 1950. Pinkspire." This introduction was never accessioned before, so NA 81114 will serve as the original NA accession of this USNA introduction. [IMPORTANT NOTE: Upon flowering, it was evident that this is not 'Pinkspire'; the flowers are entirely white with no trace of pink. Either the accession was mislabeled at the point of origin or it had somehow sported to an all-white version. | 2115989 | NA 81114 |
| 83 | WLP 1114 | NYCDPR-BBG-091 | Clethra alnifolia L. | United States | NA | | | 2011 | COLLECTED | PRE 09/2011 | | | | | Wild material | | 1889572 | WLP 1114 |
| 84 | NA 79939 | 'Hummingbird' | Clethra alnifolia L. | | NA | | Not Available | 2011 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Clethra alnifolia 'Hummingbird'. | 2151975 | NA 79939 |
| 85 | NA 85026 | 'Caleb' | Clethra alnifolia L. | | NA | | Not Available | 2010 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Clethra alnifolia 'Caleb' VANILLA SPICE. | 2153969 | NA 85026 |
| 86 | NA 77804 | RL 08288 | Clethra acuminata Michx. | | NA | | Not Available | 2008 | COLLECTED | PRE 12/15/2008 | North Carolina, Transylvania County, Toxaway Mountain; Southern Highlands Reserve, under power line. | | | | Wild material | | 1896189 | NA 77804 |
| 87 | WLP 921 | RL 08300 | Clethra acuminata Michx. | | NA | | | 2008 | COLLECTED | PRE 12/15/2008 | North Carolina, Jackson County, Cullowhee Falls | | | | Wild material | | 1896201 | WLP 921 |
| 88 | WLP 963 | MASON NECK-0207 | Clethra alnifolia L. | | NA | | | 2007 | COLLECTED | PRE 10/29/2007 | Virginia, Fairfax County, Mason Neck State Park | 38.62366000, -77.18853000 | | | Wild material | | 1895953 | WLP 963 |
| 89 | NA 76957 | 'Sixteen Candles' | Clethra alnifolia L. | | NA | | Not Available | 2007 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Clethra alnifolia 'Sixteen Candles'. | 2150867 | NA 76957 |
| 90 | NA 77205 | 'Anne Bidwell' | Clethra alnifolia L. | | NA | | Not Available | 2007 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Clethra alnifolia 'Anne Bidwell'. | 2150988 | NA 77205 |
| 91 | NA 76035 | DE.001-2006 | Clethra alnifolia L. | Delaware, United States | NA | | Not Available | 2006 | COLLECTED | 10/18/2006 | Thompson's Island State Park. | 38.70111000, -75.08902000 | 5 | Woodland coastal. Elevation: 17 feet. | Wild material | | 1716201 | NA 76035 |
| 92 | NA 75362 | RL 122 | Clethra acuminata Michx. | North Carolina, United States | NA | | Not Available | 2006 | COLLECTED | 07/01/2004 | North Carolina, Transylvania County, Toxaway Mountain; streamside west of power line and adjacent to Southern Highlands Reserve. | | | | Wild material | | 1777639 | NA 75362 |
| 93 | NA 74913 | RJLGA2003-032 | Clethra alnifolia L. | | NA | | Not Available | 2005 | COLLECTED | PRE 03/07/2005 | Georgia, Worth County, 1.43 miles southwest of Georgia Route 33 on Old Georgia Highway 33 in the Tifton Uplands | 31.42611000, -83.85277000 | | <5% slope, Clay upland soils, Wetland habitat in longleaf pine forest | Wild material | | 1895816 | NA 74913 |
| 94 | NA 74923 | FRS2004-103 | Clethra acuminata Michx. | North Carolina, United States | NA | | Not Available | 2005 | COLLECTED | 10/30/2004 | North Carolina, Graham County, Forest Service Road 423 on Snowbird Mountain above Tatham Gap in the Nantahala National Forest. | 35.25305000, -83.81083000 | | aspect SW | Wild material | | 1777601 | NA 74923 |
| 95 | NA 73588 | NA 73588 | Clethra monostachya Rehder & E. H. Wilson | | NA | | Not Available | 2004 | | | | | | | Cultivated material | Full name as recorded at U.S. National Arboretum: Clethra monostachya. | 2149733 | NA 73588 |
| 96 | NA 71974 | 'Anne Bidwell' | Clethra alnifolia L. | | NA | | Not Available | 2002 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Clethra alnifolia 'Anne Bidwell'. | 2149194 | NA 71974 |
| 97 | Ames 26060 | D1997-0824 | Clethra acuminata Michx. | West Virginia, United States | | | Historic | 2000 | COLLECTED | PRE 10/30/1997 | Along Anglins Creek, Nicholas County. | 38.10555556, -80.85000000 | | Moist wooded areas along creek. | Wild material | | 1599985 | Ames 26060 |
| 98 | NA 71586 | (C. alnifolia 'Hokie Pink' x C. pringlei) | Clethra sp. | | NA | | Not Available | 1999 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Clethra (C. alnifolia 'Hokie Pink' x C. pringlei). | 2156684 | NA 71586 |
| 99 | NA 69490 | TS98-031 | Clethra delavayi Franch. | Jiangxi Sheng, China | | | Historic | 1998 | COLLECTED | 10/10/1998 | Shangras City District, Yanshan County, Wuyi Mt. Preserve. | 27.83805556, 117.75972222 | 1820 | Steep slopes, 70-90 degrees, north north-east aspect, along road to peak, open area. Soil rocky, clay-gravel. Growing with Pyrus, Lindera, bamboo (cf Sinarundinaria), Symplocos, Weigela. | Wild material | Shrub, 2.5 m tall, upright, multistemmed, with branches near top of shrub. Bark tan-red-grey, exfoliating. | 1571472 | NA 69490 |
| 100 | NA 69505 | TS98-063 | Clethra barbinervis Siebold & Zucc. | Guangxi Zhuangzu Zizhiqu, China | NA | | Not Available | 1998 | COLLECTED | 10/19/1998 | Ziyuan County; Maoershan Reserve. | 25.89277778, 110.44472222 | 1950 | Growing alongside mountain road in full sun with Acer, Lithocarpus, Enkianthus. Soil gravelly. 10 degree slope. | Wild material | Shrub, 3.5 m tall, single-stemmed, deciduous. Leaves simple, bright red fall color. Fruit long racemes 15 cm. Herbarium specimen. | 1571516 | NA 69505 |
| 101 | NA 66911 | ''Hummingbird'' | Clethra alnifolia L. | Texas, United States | | | Historic | 1995 | DONATED | | | | | | Wild material | | 1492873 | NA 66911 |
| 102 | NA 66912 | T-37-03 Yucca Do | Clethra pringlei S. Watson | Texas, United States | | | Historic | 1995 | DONATED | | | | | | Wild material | | 1492876 | NA 66912 |
| 103 | NA 69425 | NA 69425 | Clethra alnifolia L. | | NA | | Not Available | 1994 | | | | | | | Cultivated material | Full name as recorded at U.S. National Arboretum: Clethra alnifolia. Short racemes | 2148389 | NA 69425 |
| 104 | NA 69426 | NA 69426 | Clethra alnifolia L. | | NA | | Not Available | 1994 | | | | | | | Cultivated material | Full name as recorded at U.S. National Arboretum: Clethra alnifolia. | 2148390 | NA 69426 |
| 105 | NA 69431 | 'Hummingbird' | Clethra alnifolia L. | | NA | | Not Available | 1993 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Clethra alnifolia 'Hummingbird'. Form received: rooted cutting. | 2148394 | NA 69431 |
| 106 | NA 69432 | 'Hokie Pink' | Clethra alnifolia L. | | NA | | Not Available | 1993 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Clethra alnifolia 'Hokie Pink'. Form received: rooted cutting. | 2148395 | NA 69432 |
| 107 | NA 69433 | NA 69433 | Clethra tomentosa Lam. | | NA | | Not Available | 1993 | | | | | | | Cultivated material | Full name as recorded at U.S. National Arboretum: Clethra tomentosa. Form received: rooted cutting. | 2148396 | NA 69433 |
| 108 | NA 69434 | 'Tom's Compact' | Clethra alnifolia L. | | NA | | Not Available | 1993 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Clethra alnifolia 'Tom's Compact'. Form received: rooted cutting. | 2148397 | NA 69434 |
| 109 | NA 69435 | 'Anne Bidwell' | Clethra alnifolia L. | | NA | | Not Available | 1993 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Clethra alnifolia 'Anne Bidwell'. Form received: rooted cutting. | 2148398 | NA 69435 |
| 110 | NA 69436 | 'Ruby Spice' | Clethra alnifolia L. | | NA | | Not Available | 1993 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Clethra alnifolia 'Ruby Spice'. Form received: rooted cutting. | 2148399 | NA 69436 |
| 111 | NA 69437 | 'Fern Valley Pink' | Clethra alnifolia L. | | NA | | Not Available | 1993 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Clethra alnifolia 'Fern Valley Pink'. Form received: rooted cutting. | 2148400 | NA 69437 |
| 112 | NA 75120 | NA 75120 | Clethra alnifolia L. | | NA | | Not Available | 1993 | | | | | | | Uncertain improvement status | Full name as recorded at U.S. National Arboretum: Clethra alnifolia. Rec'd by the Herb Garden then [1993], not sure when plant arrived in Fern Valley. Form received: unknown propagule type. | 2150265 | NA 75120 |
| 113 | NA 65295 | 'Tom's Compact' | Clethra alnifolia L. | | NA | | Not Available | 1993 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Clethra alnifolia 'Tom's Compact'. Form received: rooted cutting. | 2147520 | NA 65295 |
| 114 | NA 68697 | SICH 905 | Clethra monostachya Rehder & E. H. Wilson | China | NA | | Not Available | 1993 | COLLECTED | PRE 01/15/1993 | Sichuan Province, Rongjing County, In a narrow valley on a west facing hillside on the road between Rongjing and the pass on Niba Shan. | | | Frequent, in full sun in a narrow valley on a hillside, W, Gritty loam, Dense secondary shrubs | Wild material | | 1895763 | NA 68697 |
| 115 | NA 93015 | NA 93015 | Clethra monostachya Rehder & E. H. Wilson | Sichuan Sheng, China | | | Historic | 1993 | COLLECTED | 1992 | | | 1700 | | Wild material | | 1492840 | NA 93015 |
| 116 | NA 66729 | NA 66729 | Clethra pringlei S. Watson | | NA | | Not Available | 1993 | COLLECTED | | | | | | Wild material | | 1492665 | NA 66729 |
| 117 | NA 66730 | NA 66730 | Clethra pringlei S. Watson | Texas, United States | NA | | Not Available | 1993 | DONATED | 01/15/1993 | | | | | Wild material | | 1492666 | NA 66730 |
| 118 | NA 62643 | YK 339 | Clethra barbinervis Siebold & Zucc. | Honshu, Japan | | | Historic | 1991 | COLLECTED | 10/04/1990 | Gunma, Tanigwawa-dake. | | 900 | | Wild material | | 1499282 | NA 62643 |
| 119 | WLP 1044 | 1989 IS No. 11 | Clethra alnifolia L. | New Jersey, United States | NA | | | 1988 | COLLECTED | PRE 07/01/1988 | New Jersey, Burlington County | 39.50000000, -74.35000000 | | | Wild material | | 1896396 | WLP 1044 |
| 120 | NA 57554 | NA 57554 | Clethra acuminata Michx. | | NA | | Not Available | 1986 | | | | | | | Cultivated material | Full name as recorded at U.S. National Arboretum: Clethra acuminata. | 2146335 | NA 57554 |
| 121 | NA 57555 | NA 57555 | Clethra acuminata Michx. | | NA | | Not Available | 1986 | | | | | | | Cultivated material | Full name as recorded at U.S. National Arboretum: Clethra acuminata. | 2146336 | NA 57555 |
| 122 | NA 56778 | NA 56778 | Clethra acuminata Michx. | Georgia, United States | NA | | Not Available | 1985 | COLLECTED | | Cherokee County; ; | | | | | Original propagations from the wild. | 2108359 | NA 56778 |
| 123 | NA 55790 | NA 55790 | Clethra acuminata Michx. | | NA | | Not Available | 1985 | | | | | | | | | 1951723 | NA 55790 |
| 124 | NA 53763 | NA 53763 | Clethra acuminata Michx. | Virginia, United States | NA | | Not Available | 1984 | COLLECTED | | Smyth County; ; Route 16 across from Hurricane Campground | | | | | | 2108354 | NA 53763 |
| 125 | NA 49095 | SABE 485 | Clethra fargesii Franch. | Hubei Sheng, China | NA | | Not Available | 1980 | COLLECTED | 08/31/1980 | Hubei Province, Shennongjia Forest District, Laojunshan Yaowan canyon on the W side of Jiuchong River ca 1km S of Mucheng; northwestern Hubei Province. | | | NE exposure; steep, disturbed slope. | Wild material | | 1776482 | NA 49095 |
| 126 | NA 49096 | SABE 773 | Clethra fargesii Franch. | Hubei Sheng, China | NA | | Not Available | 1980 | COLLECTED | 09/08/1980 | Hubei Province, Shennongjia Forest District, NE of Guanmenshan along S side of Shicao River; northwestern Hubei Province. | | | On steep slope above the road. | Wild material | | 1776483 | NA 49096 |
| 127 | NA 44221 | NA 44221 | Clethra barbinervis Siebold & Zucc. | | NA | | Not Available | 1979 | | | | | | | Cultivated material | Full name as recorded at U.S. National Arboretum: Clethra barbinervis. According to Mr. Dilatush, this clone is more vigorous than typical Clethra barbinervis. | 2145057 | NA 44221 |
| 128 | NA 44882 | J-107-78 | Clethra barbinervis Siebold & Zucc. | Honshu, Japan | NA | | Not Available | 1978 | COLLECTED | 10/16/1978 | Ishikawa Prefecture: Noto Peninsula: above Suzu City. | | | In a natural Fagus crenata forest. | Wild material | | 1105937 | NA 44882 |
| 129 | NA 33895 | NA 33895 | Clethra alnifolia L. | | NA | | Not Available | 1971 | | | | | | | Cultivated material | Full name as recorded at U.S. National Arboretum: Clethra alnifolia. | 2144412 | NA 33895 |
| 130 | NA 33019 | 'Rosea' | Clethra alnifolia L. | | NA | | Not Available | 1970 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Clethra alnifolia 'Rosea'. Purchased through: The Friends of the National Arboretum, Lee Account. PO number 12260. | 2144350 | NA 33019 |
| 131 | NA 33022 | NA 33022 | Clethra alnifolia L. | | NA | | Not Available | 1970 | | | | | | | Cultivated material | Full name as recorded at U.S. National Arboretum: Clethra alnifolia. | 2144351 | NA 33022 |
| 132 | NA 32429 | NA 32429 | Clethra alnifolia L. | | NA | | Not Available | 1970 | | | | | | | Cultivated material | Full name as recorded at U.S. National Arboretum: Clethra alnifolia. | 2144269 | NA 32429 |
| 133 | NA 26887 | FREEMAN #4001 | Clethra alnifolia L. | Unknown | NA | | Not Available | 1939 | COLLECTED | 01/01/1939 | | | | | Cultivated material | | 1776135 | NA 26887 |