| 0 | PI 689462 | J. cinerea Bixby State Preserve | Juglans cinerea L. | Iowa, United States | COR |  | Not Available | 2015 | COLLECTED | 09/14/2015 | Bixby State Preserve, T91N R5W SE 1/4 SW 1/4 Sec. 23 Clayton County. | 42.67523100, -91.40046100 | 310 | Dry rocky soils. Near base of south, southwest-facing slope near Bear Creek. Deciduous woods. Growing in association with Quercus rubra, Tilia americana, Quercus muehlenbergii, and Fraxinus nigra. | Wild material | Accession sampled off a single mother tree measuring 44.45 cm in d.b.h. Specimen was showing a few signs of dieback/decline. Foliage moderate-very pubescent. Only one fruiting specimen noted throughout area explored. Noted additional juvenile specimens nearby (approximately 6 specimens). Little to no "buttery" smell to nuts. Nuts measured 28.28 mm (0.85 st.dev.) in width and 47.59 mm (1.75 st. dev.) in length (random sample of 10 nuts). | 1927432 | PI 689462 |
| 1 | Ames 32961 | JDC/FN/2015/047/704 | Fraxinus nigra Marshall | Iowa, United States | NC7 | | Not Available | 2015 | COLLECTED | 09/14/2015 | Bixby State Preserve, T91N R5W SW 1/4 SW 1/4 Sec. 23 Clayton County. | 42.67512900, -91.40312600 | 308 | Floodplain of Bear Creek | Wild material | | 1927431 | Ames 32961 |
| 2 | Ames 32963 | JDC/BA/2015/049/706 | Betula alleghaniensis Britton | Iowa, United States | NC7 | | | 2015 | COLLECTED | 09/14/2015 | Bixby State Preserve, T91N R5W extreme southern edge of Sec. 23 basically restricted to W 1/2 of Sec. 23. | 42.67470300, -91.39917300 | 308 | North-facing algific talus slope (45-60 degrees) adjacent to Bear Creek. Moist deciduous woods. Growing in association with Diervilla lonicera, Hamamelis virginiana, Corylus sp., Viburnum opulus var. americanum, Cornus rugosa (few), Cornus alternifolia, Fraxinus nigra, Quercus rubra, Viburnum lentago, Ribes sp., Rubus idaeus subsp. strigosus, Rhamnus alnifolia (few), Rosa sp., Taxus canadensis, Prunus virginiana, Impatiens sp., Dirca palustris, and Pinus strobus (few). | Wild material | | 1927433 | Ames 32963 |
| 3 | Ames 32964 | JDC/HV/2015/050/707 | Hamamelis virginiana L. | Iowa, United States | NC7 | | Not Available | 2015 | COLLECTED | 09/14/2015 | Mossy Glen State Preserve, T91N R5W NW 1/4 SW 1/4 SW 1/4 Sec. 10 Clayton County. | 42.70626200, -91.42632400 | 320 | North and northwest-facing slopes (45 degrees) rocky, loose soils. Deep valley of moist deciduous woods. Growing in association with Tilia americana, Quercus alba, Ostrya virginiana, Acer saccharum, Carpinus caroliniana, and Staphylea trifolia. | Wild material | Specimens initiating flower at time of collection. Numerous specimens reaching close to 25' in height. Genetics would represent the extreme northwestern edge of this species native range. | 1927434 | Ames 32964 |
| 4 | Ames 32825 | JDC/DL/2014/145/648 | Diervilla lonicera Mill. | Iowa, United States | NC7 |  | | 2014 | COLLECTED | 10/29/2014 | Bixby State Park located approximately 2.25 miles north of Edgewood, T91N R5W SE 1/4 SE 1/4 SW 1/4 Sec. 23 | 42.67442600, -91.39783400 | 323 | Moist woods, north-facing (45 degres) slope. | Wild material | | 1921785 | Ames 32825 |
| 5 | Ames 27316 | Bixby SP | Viburnum opulus L. var. americanum Aiton | Iowa, United States | NC7 |  | Not Available | 2004 | COLLECTED | 09/15/2003 | Bixby State Park near Edgewood, T91N R5W W edge of SE 1/4 of SW 1/4 Sec. 23. | 42.67527770, -91.40222200 | 302 | Mucky limestone seep, lower part of algific talus slope. Over 1/2 shaded. 60% slope w/ N aspect. Organic soil w/ high stoniness, saturated, poor drainage. | Wild material | Formerly known as Viburnum trilobum, American highbush cranberry (V. opulus var. americanum) is a North American native shrub that is utilized as an important ornamental and conservation plant that is also harvested as a minor fruit crop (jams/jellies). In nature, this variety is generally found in moist habitats typically along stream banks and swamps where ample moisture is readily available. The native range of V. opulus var. americanum is concentrated in the northeastern United States and into Canada (Little, E. L. Jr. 1977). Attractive ornamental characteristics includes showy lacecap flowers in spring and bright red fruits and foliage in the fall. Fruits are tart with a hint of sweetness. The European highbush cranberry (V. opulus var. opulus) is nearly identical to American highbush cranberry other than small glands (<1 mm) on the petiole making the exact determination very challenging resulting in common misidentifications. A major difference between the American and European highbush cranberries is that the European variety produces unpalatable fruit. Recent research has shown that American and European highbush cranberries are genetically distinct and that plants of hybrid origin are uncommon (Tork et al. 2025). Based on taste of fruits and morphological characters, this accession from northeastern Iowa is being identified as V. opulus var. americanum. | 1897406 | Ames 27316 |