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	ACCESSION	PLANT NAME	TAXONOMY	ORIGIN	GENEBANK	IMAGE	AVAILABILITY	RECEIVED	SOURCE TYPE	SOURCE DATE	COLLECTION SITE	COORDINATES	ELEVATION	HABITAT	IMPROVEMENT LEVEL	NARRATIVE
0	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	The native range of Populus grandidentata is concentrated througout the northeastern United States with disjunct populations in far south as Kentucky and as far west as central Iowa (Little, E. L. Jr. 1971). Bigtooth aspens are known to be fast-growing trees, making for a quick source of shade in the landscape. As a pioneer species in nature, P. grandidentata is adaptable to a wide range of environments but is considered to be slightly less adaptable than quaking aspen. However, bigtooth aspen is more resistant to canker diseases than quaking aspen (Laidly 1990), potentially making it slightly longer-lived. Bark on big-tooth aspens is generally greyish to greyish-yellow or olive-green compared to quaking aspens where bark is typically white to greyish-white. Leaves and leaf serrations are larger, and the degree of suckering is lower in big-tooth aspens. Both species are well known for their leaves to quake or tremble as the lengthy petioles allow leaves to swivel in the slightest amount of wind. Populus use is well-documented throughout the world and encompasses a wide range of products including energy feedstock, wood chips for pulping fibers, veneer logs, agro-forestry, and phyto-remediation as well as several other environmental applications. Interspecific hybrids of P. grandidentata and P. canescens have superior performance in yield; Hypoxylon canker resistance; and rooting ability compared to pure, N. American aspen genetics. This accession represents genetics acquired from the Des Moines River Valley of central Iowa and considered a disjunct population. P. grandidentata is infrequent to somewhat common throughout parts of the Des Moines River Valley, but very localized. The next closest, native population would be found in Hardin County (Iowa) approximately 50 miles to the northeast near Eldora. In central Iowa, this accession has been noted to have excellent, yellow fall color that typically peaks in mid-October (e.g. 21 October 2015). Fruits usually mature in early May (e.g. 3 May 2017) coinciding with flower initiation on local genotypes of Prunus virginiana. Specimens sampled in nature measuring approximately 60' in height and 16-22" dbh. Due to this accession originating from the western and southern edge of the species native range, it is suspected that this accession would have excellent heat and drought tolerance compared to genetics from areas in the northeastern U.S.	1949856	Ames 33965
1	Ames 35995	Kauten Fen	Salix discolor Muhl.	Iowa, United States	NC7			2023	COLLECTED	02/06/2023	Kauten Fen, T92N R8W NE 1/4 of SW 1/4 of NE 1/4 Sec.16.	42.78400000, -91.79050000	345	Closely followed gradient of drainage creek, approximately 10 yards to the west of the small drainage creek. 1 to 4 percent slope. Clyde-Floyd complex (clay loam); poorly drained soils. Water table at approximately 12 inches.	Wild material	The native range of Salix discolor is concentrated in the northeastern United States and also throughout southern Canada (Little, E. L. Jr. 1977). Generally adapted/tolerant to wet soils this species is often found in meadows, fens, swamps, and streambanks. Attractive ornamental characteristics includes early spring, showy flowers and yellow foliage in the fall. Salix discolor provides a critical source of pollen at the beginning of the growing season for a plethora of pollinators and also serves as a larval host to many insect species. Salix discolor are commonly used in the cut flower industry for both their showy catkins and colorful, dormant winter stems. This germplasm was collected as dormant cuttings from a northeastern Iowa site, Kauten Fen, which is a site boasting with Salix diversity. One could likely find just about any hybrid combination possible and observe a wide-diversity of morphology across hybrids and within species. Acquisition specifically targeted characters that were most characterstic of Salix discolor. Field observations of this accession grown in cultivation has shown this accession to be extremely vigorous. Established specimens coppiced at grown level generates very thick shoots reaching 7-8' in height in a single growing season.	2141279	Ames 35995

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