| 0 | MIA 36876 | MIA 36876 | Zanthoxylum americanum Mill. | | MIA |  | | 1992 | | | | | | | Wild material | | 1947456 | MIA 36876 |
| 1 | Ames 38800 | Camp Mitigwa | Amelanchier arborea (F. Michx.) Fernald | Iowa, United States | NC7 |  | | 2026 | COLLECTED | 06/01/2026 | Mitigwa Scout Camp located on west side of Des Moines River watershed approximately 7.50 miles south, southwest of Boone, T82N R26W N 1/4 Sec. 5 and T83N R26W S 1/4 Sec. 32. | 41.94894500, -93.90537200 | 310 | High-quality white oak - ironwood, mature woods. | Wild material | The native range of Amelanchier arborea is concentrated in the eastern half of the U.S. (Little, 1977). This accession represents a collection of A. arborea germplasm from the western edge of the species native range, specifically central Iowa. Specimens sampled at the collection site in nature were small to medium understory or woodland edge single and/or multi-trunked trees with a few trees getting close to being deemed as canopy specimens. Bark smooth and light grey in color. Specimens sampled in nature ranging 15-50' in height. Peak flowering occurred on 8 April 2026 with white flowers appearing prior to leaf expansion. Fall colors ranging from orange to orange-red peaking typically at the end of September (central Iowa). Fruits, dark-pink to red, maturing in early June (peak in 2026 occurred on 2 June) averaging 8 mm in diameter, except for mother tree #6 that had rather large fruits at 11 mm in diameter. | 2197049 | Ames 38800 |
| 2 | Ames 36327 | Lick Creek Unit | Amelanchier arborea (F. Michx.) Fernald | Iowa, United States | NC7 |  | | 2025 | COLLECTED | 06/10/2025 | Shimek State Forest Lick Creek Unit just east of Farmington, T67N R7W NE ¼ Sec. 8 and Sec. 7 and also T68N R8W Sec. 25. | 40.62024500, -91.70427700 | 214 | Woodland edges. | Wild material | The native range of Amelanchier arborea is concentrated in the eastern half of the U.S. (Little, 1977). This accession represents a collection of A. arborea germplasm from the western region of the species native range, specifically the extreme southeastern corner of Iowa. Specimens sampled in nature ranging 15-35' in height. Typically smoothish bark, light grey in color. Peak flowering (white flowers) occuring usually in early April with orange, orange-red fall colors peaking typically end of September (southeastern Iowa). | 2191464 | Ames 36327 |
| 3 | Ames 36017 | AS/GD/2023/002/212 | Gymnocladus dioicus (L.) K. Koch | Wisconsin, United States | NC7 |  | | 2023 | | | | | | | Wild material | Kentucky coffeetree in Wisconsin is rather rare. The Wisconsin Natural Heritage Inventory Program currently (2023) lists this taxon in Wisconsin as a species of concern with a state rank of S2 (Imperiled in Wisconsin due to a restricted range, few populations or occurrences, steep declines, severe threats, or other factors.) This accession represents genetics from a localized population with a near equal porportion of male and female specimens. While there are other known locations along the Wisconsin River, this population is producing seeds. The other known locations represent single clones that are distant enough from other existing clones that prevent the transfer of pollen and thus lack the ability to produce seed or will rarely produce. | 2141550 | Ames 36017 |
| 4 | Ames 35746 | Guye Woods | Acer saccharum Marshall subsp. nigrum (F. Michx.) Desmarais | Iowa, United States | NC7 |  | | 2021 | COLLECTED | 09/08/2021 | Guye Woods County Park located 6.0 miles northeast of Winterset, T76N R27W NE1/4 Sec. 4 | 41.41235000, -93.96373000 | 278 | Moist deciduous maple, oak, hickory forest, northwest facing slope above the North River. | Wild material | Multiple specimens in this population were observed to be 24" diameter at breast height (DBH) or larger with the largest specimen encountered at the time of collection measuring 36.5" DBH.
Morphological traits of leaves suggests sampled specimens are true to type of Acer saccharum subsp. nigrum including leaves with three distinct points, leathery/thick, and drooping in appearance. On September 25, 2020 (Schmitz, A., personal communication, 31 January 2022), peak fall color on Acer saccharum subsp. nigrum at Guye Woods was observed with specimens having a clean yellow fall color, also indicative of Acer saccharum subsp. nigrum.
| 2122010 | Ames 35746 |
| 5 | Ames 35649 | Backbone | Pinus strobus L. | Iowa, United States | NC7 |  | | 2021 | COLLECTED | 03/04/2021 | Backbone State Park located approximately 5.15 miles south, southwest of Strawberry Point, T90N R6W NW1/4 Sec. 16 | 42.61131500, -91.56098900 | 316 | Cliff edges and steep slopes above the Maquoketa River, including the ridge known as the "Backbone". | Wild material | The native range of Pinus strobus is concentrated in the northeastern United States extending south into the northern edge of Georgia and west to central Minnesota. In Iowa, there are scattered populations in a few northeastern counties and also a very small disjunct population in central Iowa (Hardin County, Ames 32758) and also one in southeastern Iowa (Muscatine County, Ames 35635). This accession represents genetics from "legacy" specimens from northeastern Iowa in Backbone State Park (Delaware County). Although a significant number of P. strobus were planted at this park in the 1920's a significant number of native specimens still exist throughout the park typically found on extreme topographical features such as steep slopes and rock outcroppings. Genetics from this site likely represents the extreme southwestern edge of the species native range. Genetics may likely be adapted/tolerant to drought and also late winter/early spring extreme temperature fluctuations. Accession was collected as scions in winter to capture genetics that are of known origin. | 2113351 | Ames 35649 |
| 6 | Ames 35650 | Bixby | Pinus strobus L. | Iowa, United States | NC7 |  | | 2021 | COLLECTED | 03/04/2021 | Bixby State Preserve on slopes above Bear Creek, located approximately 6.25 miles east of Strawberry Point, T91N R5W SE1/4 Sec. 22 | 42.67534800, -91.41301000 | 324 | Cliff edges and steep slopes. | Wild material | The native range of Pinus strobus is concentrated in the northeastern United States extending south into the northern edge of Georgia and west to central Minnesota. In Iowa, there are scattered populations in a few northeastern counties and also a very small disjunct population in central Iowa (Hardin County, Ames 32758) and also one in southeastern Iowa (Muscatine County, Ames 35635). This accession represents genetics from "legacy" specimens from northeastern Iowa in Bixby State Preserve (Clayton County). Genetics from this site likely represents the extreme southwestern edge of the species native range. Genetics may likely be adapted/tolerant to drought and also late winter/early spring extreme temperature fluctuations. Accession was collected as scions in winter to capture genetics that are of known origin. | 2113352 | Ames 35650 |
| 7 | Ames 35615 | Ames 35615 | Aronia arbutifolia (L.) Pers. | Michigan, United States | NC7 |  | | 2020 | COLLECTED | 11/03/2020 | Warren Townsend Park located just northeast of Cannonsburg southwest of Ramsdell Dr. and Six Mile Rd. intersection, T8N R10W NE ¼ NW ¼ Sec. 26, Cannon Twp., Kent County | 43.05606700, -85.46435100 | 239 | Shrubby edge of old stream (Bear Creek) oxbow, adjacent to wet meadow with groundwater upwelling. Muck soils. | Wild material | Plants in nature measuring approximately six meters in height; elongate shrubs mostly unbranched; bright-red fruits measuring between 4-7 mm in diameter; tomentose leaves underneath; scarlet fall color. This collection was discovered in 2011 and represents the first report of the species for the state of Michigan (Ryskamp and Warners 2012) and thus represents a widely disjunct population where the next nearest documented population is in southern Ohio (Clermont County). | 2110277 | Ames 35615 |
| 8 | Ames 35242 | APS/EA/2019/046/375 | Euonymus atropurpureus Jacq. | Missouri, United States | NC7 |  | | 2019 | COLLECTED | 11/02/2019 | Mule Shoe Conservation Area along CR 66 approximately 7.5 miles east of Cross Timbers. | 38.01203000, -93.09312000 | 265 | Roadside, deciduous forest. | Wild material | | 2097787 | Ames 35242 |
| 9 | Ames 35234 | JDC/AS/2019/041/920 | Agastache scrophulariifolia (Willd.) Kuntze | Minnesota, United States | NC7 |  | | 2019 | COLLECTED | 10/24/2019 | Private property approximately 4.94 miles south, southwest of Cannon Falls, T111N R18W NW1/4 Sec. 13, Goodhue County | 44.42498900, -92.93729200 | 346 | Woodland edges, slightly disturbed. | Wild material | Plants measuring approximately 5-6' in height with 4-5" spikes pale pink in color. Stems and petioles tomentose. Peak flowering occurred circa 1 September 2019 and fruiting circa 1 October 2019 in nature. | 2097770 | Ames 35234 |
| 10 | Ames 34052 | PB1701 | Betula papyrifera Marshall | Minnesota, United States | NC7 |  | | 2017 | COLLECTED | 09/16/2017 | Detroit Mountain area just east of Detroit Lakes approximately 2.9 miles, T139N R40W SW 1/4 NE 1/4 and NE 1/4 NE 1/4 NW 1/4 Sec. 21, Becker County | 46.81210900, -95.78208300 | 457 | Mixed deciduous woods. | Wild material | | 1954341 | Ames 34052 |
| 11 | Ames 34023 | Ames 34023 | Viburnum prunifolium L. | Iowa, United States | NC7 |  | | 2017 | COLLECTED | 09/27/2017 | Shimek State Forest, Donnellson Unit, approximately 6.0 miles west of Donnellson. | 40.64796000, -91.67764000 | 219 | Oak-hickory upland forest. | Wild material | Plants at collection site ranging between 10-15' tall. Fruits dark purple, leaves on some stems were turning red fall color at time of collection (09/27/2017). | 1953995 | Ames 34023 |
| 12 | Ames 33918 | APS/GD/2017/008/267 | Gymnocladus dioicus (L.) K. Koch | Minnesota, United States | NC7 |  | | 2017 | COLLECTED | 03/16/2017 | Minnesota River watershed covering approximately 9.0 river miles between Redwood Falls and Vicksburg Park, Renville County | 44.61447700, -95.14878600 | 254 | Mixed habitats, both upland dry sites, wet sites, and rocky sites. | Wild material | | 1946985 | Ames 33918 |
| 13 | Ames 33921 | APS/GD/2016/001/236 | Gymnocladus dioicus (L.) K. Koch | Minnesota, United States | NC7 |  | | 2017 | COLLECTED | 03/17/2017 | Blue Earth River watershed covering approximately 9.0 river miles from Vernon Center south to the county line, Blue Earth and Faribault Counties | 43.87215300, -94.17375800 | 316 | Mixed habitats, both upland dry and wet sites. | Wild material | | 1946988 | Ames 33921 |
| 14 | Ames 33752 | Ames 33752 | Maclura pomifera (Raf.) C. K. Schneid. | Iowa, United States | NC7 |  | | 2016 | COLLECTED | 10/05/2016 | Deer Creek watershed, T80N R23W E1/2 Sec. 18. | 41.73813000, -93.56296400 | 295 | Mixed deciduous woods, distrubed areas and also managed areas. Gentle slopes and wetlands | Uncertain improvement status | The native range for Osage-orange is reported from eastern Texas, southeastern Oklahoma, southwestern Arkansas, and the northwestern corner of Louisiana (Little, 1971). Historically and presently known for its extreme value as bow-wood and fence posts, Osage-orange represents one of the most widely planted tree species in the lower 48 US states as a living fence starting in the mid-1800's, in the late 1900's as a landscape tree for difficult sites, and most recently its chemical properties. Detailed history of Osage-orange and it's economic uses are well documented (Smith and Perino, 1981 and J. T. Winberry 1979). Osage wood is highly-prized for its use as fence posts (both living and non-living) and durable wood for wood working. Osage is an extremely drought and heat tolerant tree and is recommended for use in USDA cold-hardiness zones 5b or warmer. Although the species is commonly known for its stout thorns and large, globular fruits, the species is dioecious and the degree of thorns on individual genotypes can be extremely variable. This accession represents germplasm from a naturalizing, reproductive population collected in central Iowa (Polk County). Majority of specimens averaged approximately 40-50’ in height with multiple (e.g. 4-5) trunks. Specimens 03-1 and 03-2 were upright in form with tighter branch angles, while 03-10 was the widest spreading of all trees. Some yellow fall color (yellow) was apparent at time of fruit collection (10/05/2016). Size of fruits ranged from 9.00 to 10.75 inches circumference except for tree 03-5 with fruits averaging 7.33 inches circumference. | 1942949 | Ames 33752 |
| 15 | Ames 33289 | APS/GD/2016/010/245 | Gymnocladus dioicus (L.) K. Koch | Michigan, United States | NC7 |  | | 2016 | COLLECTED | 04/05/2016 | Ionia County: T5N R5W SW 1/4 SW 1/4 SE 1/4 Sec. 21; T5N R5W NE 1/4 NW 1/4 NW 1/4 Sec. 20; and T5N R5W SW 1/4 SW 1/4 SE 1/4 Sec. 20 along Grand River approximately 4.80 miles south and slightly west of Portland. | 42.80296200, -84.91275400 | 231 | Floodplain. | Wild material | | 1940346 | Ames 33289 |
| 16 | Ames 33291 | APS/GD/2016/015/250 | Gymnocladus dioicus (L.) K. Koch | Michigan, United States | NC7 |  | | 2016 | COLLECTED | 04/07/2016 | Shiawassee County: T6N R4E SE 1/4 SE 1/4 SW 1/4 Sec. 30; T5N R4E SE 1/4 NW 1/4 Sec. 7; and T6N R3E SE 1/4 SE 1/4 NE 1/4 Sec. 25 along Shiawassee River both northeast (approximately 1.35 miles) and southeast (approximately 2.63 miles) of Bancroft. | 42.87985700, -84.03461800 | 244 | Floodplain. | Wild material | | 1940348 | Ames 33291 |
| 17 | Ames 32965 | JDC/BA/2015/051/708 | Betula alleghaniensis Britton | Iowa, United States | NC7 | | | 2015 | COLLECTED | 09/15/2015 | Yellow River State Forest, T97N R4W northern edge of SW 1/4 NW 1/4 Sec. 36 | 43.17782100, -91.26584600 | 227 | North-facing algific talus slope (45-60 degrees) adjacent to Paint Creek. Moist deciduous woods. Growing in association with Fraxinus nigra, Staphylea trifolia, Carpinus caroliniana, Quercus rubra, Acer saccharum, Cornus alternifolia, Amelanchier arborea, Ostrya virginiana, Viburnum opulus var. americanum, Cornus rugosa, Cornus alternifolia, Zanthoxylum americanum, Viburnum rafinesqueanum, Cypripedium pubescens, Ribes sp.,Corylus sp., Juniperus virginiana, Dirca palustris, Ulmus thomasii, Prunella vulgaris, Diervilla lonicera, Quercus macrocarpa, Carya cordiformis, Taxus canadensis, Tilia americana, Adiantum pedatum, and Aconitum noveboracense. | Wild material | | 1927435 | Ames 32965 |
| 18 | Ames 32966 | JDC/VA/2015/052/709 | Viburnum opulus L. var. americanum Aiton | Iowa, United States | NC7 |  | | 2015 | COLLECTED | 09/15/2015 | Yellow River State Forest, T97N R4W northern edge of SW ¼ NW ¼ Sec. 36. | 43.17778200, -91.26642800 | 239 | North-facing algific talus slope (45-60 degrees) adjacent to Paint Creek. Moist deciduous woods. | 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. americana 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). Vigorous early spring growth and good tolerance to late spring frosts. Genetic analysis from Tork et al. 2025 confirmed that genetics of this accession represents American highbush Cranberry (Viburnum opulus var. americanum). This accession represents genetics from northeast Iowa and thus the extreme western edge of the species native range. | 1927436 | Ames 32966 |
| 19 | Ames 32827 | JDC/SA/2014/147/650 | Spiraea alba Du Roi | Iowa, United States | NC7 |  | | 2014 | COLLECTED | 11/04/2014 | Marietta Sand Prairie State Preserve located approximately 7.5 miles northwest of Marshalltown, T84N R19W NW 1/4 SE 1/4 NW 1/4 SW 1/4 Sec. 11. | 42.09710000, -93.03720000 | 308 | Virgin, remnant diverse prairie. Both extremely sandy and wet habitats. Colo-Ely complex (0-5 percent slopes) depth to water table: 0-12 inches, 0-11 inches: silty clay loam, poorly drained; and Sparta loamy fine sand (5-9 percent slopes) depth to water table: more than 80 inches, 0-8 inches: loamy fine sand, excessively drained | Wild material | | 1921787 | Ames 32827 |
| 20 | Ames 32820 | APS/EA/2013/041/126 | Euonymus atropurpureus Jacq. | Iowa, United States | NC7 |  | | 2014 | COLLECTED | 10/10/2014 | Midland Trail Road near North Racoon River watershed. Dallas County T80N R27W SW 1/4 NW 1/4 Sec. 30 | 41.71142000, -94.04538000 | 299 | Wooded roadside. | Wild material | | 1921780 | Ames 32820 |
| 21 | Ames 32805 | JDC/SO/2014/122/624 | Symphoricarpos orbiculatus Moench | Iowa, United States | NC7 | | | 2014 | COLLECTED | 10/07/2014 | Slab Castle Wildlife Management Area, NW 1/4 of NE 1/4 of Section 15, T71N, R21W, Lucas County. | 40.95155200, -93.26103800 | 283 | Bottomland/floodplain of Chariton River watershed. | Wild material | | 1921816 | Ames 32805 |
| 22 | 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 |
| 23 | Ames 32387 | JDC/BN/2014/014/516 | Betula nigra L. | Iowa, United States | NC7 |  | | 2014 | COLLECTED | 06/05/2014 | Chia Fen, T81N R5W NW 1/4 of NW 1/4 Sec. 13. | 41.82947400, -91.38152400 | 226 | Sand prairie with likely high water table. | Wild material | | 1919308 | Ames 32387 |
| 24 | Ames 31987 | APS/GD/2013/011/096 | Gymnocladus dioicus (L.) K. Koch | Kansas, United States | NC7 |  | | 2013 | COLLECTED | 02/20/2013 | Camp Wood, near Cottonwood River, south of Elmdale, NW 1/4 of Section 3, T20S R7E, Chase County. | 38.34698100, -96.65080500 | 377 | Samples obtained from both upland, rocky and floodplain habitat. | Wild material | | 1907540 | Ames 31987 |
| 25 | Ames 31676 | GA12010001 | Fraxinus pennsylvanica Marshall | Minnesota, United States | NC7 |  | | 2012 | COLLECTED | NEAR 09/24/2012 | Near Mashaug Creek just north of Twin Valley, Norman County. | 47.28851660, -96.26865000 | 327 | Upland forest, dominated by Populus deltoides. | Wild material | | 1906587 | Ames 31676 |
| 26 | Ames 31678 | GA12003001 | Fraxinus pennsylvanica Marshall | Minnesota, United States | NC7 |  | | 2012 | COLLECTED | NEAR 09/26/2012 | Buffalo River State Park along the Buffalo River, east of Glyndon, Clay County. | 46.86481660, -96.46406660 | 302 | Floodplain. Transistion zone between prairie and forest | Wild material | | 1906589 | Ames 31678 |
| 27 | Ames 31524 | JDC/FQ/2012/033/426 | Fraxinus quadrangulata Michx. | Indiana, United States | NC7 |  | | 2012 | COLLECTED | 07/22/2012 | Near Devil's Backbone, along Fort Ritner Road, S 1/2 of Section 17, and Section 18, T4N, R2E, Tunnelton Quad, just north and northeast of Tunnelton, Lawrence County. | 38.77591000, -86.32114800 | 202 | Dry, rocky, steep, north and south-facing slopes. | Wild material | | 1903751 | Ames 31524 |
| 28 | Ames 30680 | JDC/FP/2010/065/335 | Fraxinus pennsylvanica Marshall | Wisconsin, United States | NC7 |  | | 2010 | COLLECTED | 09/28/2010 | Boat ramp on south side of Little Falls Lake, Willow River State Park, NW 1/4 of SW 1/4 of Section 9, T29N R19W, Somerset South Quad, St. Croix County. | 45.02739000, -92.72092000 | 299 | Scattered throughout lakeshore forest | Uncertain improvement status | | 1853838 | Ames 30680 |
| 29 | Ames 30481 | APS/GD/2010/001/036 | Gymnocladus dioicus (L.) K. Koch | Missouri, United States | NC7 |  | | 2010 | COLLECTED | 02/17/2010 | Mark Twain Lake Project (Army Corp of Engineers), Mark Twain Lake, T54N R8W SE 1/4 of NW 1/4 of Section 2 and west 1/2 of Sec. 11, Florida Quad, Monroe County. | 39.49270000, -91.76510000 | 199 | Northwest-facing bluff; woods. | Wild material | #106 measured 14.5" d.b.h and 70-80'; #107 measured 9.5" and 70-80'; #108 measured 11" d.b.h. and 60-70'; #109 measured 9.5" d.b.h. and 40-50'; #110 measured 11" d.b.h. at 30-40'; and #111 measured 6" d.b.h. and 30'. | 1831340 | Ames 30481 |
| 30 | Ames 30146 | JDC/FP/2009/033/183 | Fraxinus pennsylvanica Marshall | Wisconsin, United States | NC7 |  | | 2009 | COLLECTED | 09/22/2009 | Blackhawk Unit, Lower Wisconsin State Riverway, NW 1/4 of SE 1/4 of Section 23, T9N, R6E, Black Earth Quad, Dane County. | 43.24361111, -89.73972222 | 226 | Wisconsin River watershed/floodplain | Wild material | | 1819727 | Ames 30146 |
| 31 | Ames 30174 | JDC/SA/2009/034/184 | Spiraea alba Du Roi | Wisconsin, United States | NC7 |  | | 2009 | COLLECTED | 09/22/2009 | Blackhawk Unit, Lower Wisconsin State Riverway, T9N R6E SE 1/4 of NE 1/4 of Sec. 23, Black Earth Quad, Dane County | 43.24361111, -89.73972222 | 226 | Wisconsin River watershed/floodplain | Wild material | | 1819755 | Ames 30174 |
| 32 | Ames 29848 | JDC/GD/2009/001/151 | Gymnocladus dioicus (L.) K. Koch | Minnesota, United States | NC7 |  | | 2009 | COLLECTED | 02/02/2009 | Minnesota River Watershed approximately 2-3 miles north-northeast of Le Sueur, NW 1/4 of NW 1/4 of Section 19, T112N, R25W, Tyrone Township, Le Sueur Quad, Le Sueur County. | 44.49833333, -93.88666667 | 238 | Floodplain/mesic woods adjacent to river. Majority found on lower slopes (20%, west facing) & where ravines met bottomland. Few found at higher elevation; dry ridge on slope (30%, south facing). | Wild material | Plant size ranged from approximately 40 to 90 feet in height and 36 to 60 d.b.h. | 1794565 | Ames 29848 |
| 33 | Ames 29376 | APS/GD/2009/009/018 | Gymnocladus dioicus (L.) K. Koch | Iowa, United States | NC7 |  | | 2008 | COLLECTED | 02/03/2008 | Skunk River Watershed. T85N R23W W 1/2 of Sec. 19 Story City Quad; T84N R24W NW 1/4 of Sec. 7 and T84N R23W SE 1/4 of Sec. 12 Ames East Quad, Story County | 42.10222222, -93.57944444 | 280 | Floodplain/bottomland forest. | Wild material | In 2012, a total of 59 mature specimens (d.b.h. of approximately 12" or greater) of Gymnocladus dioicus were noted growing along a 5 mile linear stretch along the Skunk River with 37 specimens recorded as females and 22 recorded as non-fruiting. Considering that seed production was very poor in 2012, some specimens recorded as non-fruiting (potentially males) may actually be females. The SE 1/4 of Sec. 12 seemed to have a fair amount of G. dioicus regeneration with very small (6-24" tall) seedlings present along with an abundant number of Celtis occidentalis in the area of various sizes. Two very large (20-24" d.b.h. specimens of G. dioicus recently dropped to the ground, most likely the result of strong winds. This area also seems to represent two, distinctly different "clones" of males based on morphological branching structure. The SW 1/4 of Sec. 19 has an abundant population of Tilia americana that were significant in size (20-24" d.b.h. and approximately 70' in height). The largest specimen of G. dioicus found in this area is approximately 90' in height and 40' in width and 35.5" in diameter. | 1749824 | Ames 29376 |
| 34 | Ames 27962 | Quercus Wilderness Area | Amelanchier arborea (F. Michx.) Fernald | Iowa, United States | NC7 |  | | 2003 | COLLECTED | 05/26/2003 | Quercus Wilderness Area located 6.75 miles south, southwest of Oskaloosa, T74N R16W SE ¼ NE ¼ of Sec. 23. | 41.19888889, -92.66111111 | 244 | Mature woods on very sandy soils. Typically restricted to east, west or south facing slopes at either summits or mid-slopes. | Wild material | The native range of Amelanchier arborea is concentrated in the eastern half of the U.S. (Little, 1977). This accession represents a collection of A. arborea germplasm from the western edge of the species native range, specifically the southern portion of Iowa. As of 2025, the top ten largest specimens in the state of Iowa are located at Quercus Wilderness where this accession was collected. Iowa’s largest specimen of A. arborea specimen at Quercus Wilderness was measured at 14.17" DBH, 51.83’ in height, and 27.00’ average crown spread for a total of 102.955 points (Rouw, M., personal communication, 12 December 2023). Fall color (orange-red) tends to peak in the middle of September (Iowa) with peak fruiting occurring in early May. Bark smooth, grey. | 1700483 | Ames 27962 |