| 0 | Ames 36332 | JDC/QP/2024/014/1136 | Quercus prinoides Willd. | Iowa, United States | NC7 |  | Not Available | 2024 | COLLECTED | 09/10/2024 | Located 5.95 miles south of Guthrie Center along west side of state highway 25, T78N R32W SE ¼ NE ¼ Sec. 2. | 41.59097000, -94.49079000 | 372 | Upland, deciduous woods edge, mixed with prairie forbs/grasses. | Wild material | At the collection site in nature, majority of speciems noted were suckering bushes measuring 3-5’ in height with the largest clonal patch measuring approximately 3’ x 4’ (area) and only 3’ in height. Minimal acorn production estimated at 10-15 acorns per genet. Recent research (Hipp et al., 2019), noted that using the unweighted pair group method with arithmeic mean and non-metric multidemensional scaling ordination did not separate individuals of Q. muehlenbergii and Q. prinoides as distinct species. However, W. M. Keith Jr. (1957) states that "Q. muehlenbergii never spreads vegetatively and acorns are rarely borne until it has attained small tree size whereas Q. prinoides bears at extremely small sizes, usually a foot or so high and spreads vegetatively via rhizomes". This collection represents genetics harvested from specimens with rhizomatous growth habits. | 2191817 | Ames 36332 |
| 1 | Ames 35936 | JDC/QP/2022/037/1017 | Quercus prinoides Willd. | Iowa, United States | NC7 |  | Not Available | 2022 | COLLECTED | 09/13/2022 | Fry Hill Cemetery located 1.25 miles northeast of Lucas, T72N R23W NE ¼ NE ¼ NE ¼ Sec. 13. | 41.04226000, -93.44382500 | 304 | Mixed upland, deciduous woods and open, remnant prairie. | Wild material | At the collection site in nature, there are a number of multi-stemmed bushes measuring 2-3 m in height, but a few specimens are clonally suckering with the largest clonal patch measuring approximately 6 m x 6m in area and only 1 m in height. One specimen noted was tree form measuring approximately 3 m in height. Extremely limited acorn production estimated at 1-10 acorns per genet. Genetics acquired as acorns (2022) from both rhizomatous and small, multi-stemmed bush types. Genetics acquired as root suckers (2023) were sampled only from rhizomatous specimens. Recent research (Hipp et al., 2019), noted that using the unweighted pair group method with arithmetic mean and non-metric multidimensional scaling ordination on genetic data did not separate individuals of Q. muehlenbergii and Q. prinoides as distinct species. However, W. M. Keith Jr. (1957) states that "Q. muehlenbergii never spreads vegetatively and acorns are rarely borne until it has attained small tree size whereas Q. prinoides bears at extremely small sizes, usually a foot or so high and spreads vegetatively via rhizomes". We suspect that multi-stemmed bushes or small trees likely represent genetics that are of hybrid origin between Q. muehlenbergii x Q. prinoides, including introgression by either parent. Those that are represented as clonally suckering specimens represent true to type Q. prinoides. This accession is being maintained as a small planting of distinct, rhizomatous clones that all share the same low growing (e.g. less than 2 meters tall), growth habit that spread via rhizomes. | 2139720 | Ames 35936 |
| 2 | Ames 23752 | NSA 960194 | Quercus hybr. | Nebraska, United States | NC7 |  | | 1997 | COLLECTED | PRE 1997 | Southwest of Salem approximately 2.6 miles, T1N R15E NW 1/4 NW 1/4 Sec. 21, Richardson County. | 40.04268000, -95.74558000 | 330 | Prairie knoll/ridge, very dry and rocky substrate. Growing in association with Rhus sp., Liatris aspera (white and purple), Juniperus virginiana, Quercus rubra, Quercus macrocarpa, and Schizachyrium scoparium. | Wild material | Specimens at the collection site in nature are represented as very large/old plants, approximately 5.0 meters in height with trunk diameters to 25.0 cm. After 15 years of growth in cultivation in central Iowa, specimens average approximately 3.5 x 3.5 meters. This species is reported to sucker, but all specimens of this accession have shown no signs of suckering while grown in cultivation. Peak fall color tends to occur during the second week in October in central Iowa ranging from reddish-orange; brownish-red, brownish-orange, etc. Acorn production tends to be consistently heavy every year and can initiate production after three years in age. Peak fruiting tends to occur between 10-20 of September in central Iowa, which is approximately 1-2 weeks prior to Q. muehlenbergii. Acorns are extremely favored by deer, rabbits, raccoons, turkeys and bluejays. Quercus prinoides in Nebraska is extremely rare. To date (2022), only two counties totalling four localities have recorded this taxa including Richardson County: two areas near Salem; one in Indian Caves State Park and one in Nemaha County described as near Nemaha. Species tends to be restricted to dry rocky upland hills and bluffs. Recent research (Hipp et al., 2019), noted that using the unweighted pair group method with arithmetic mean and non-metric multidimensional scaling ordination did not separate individuals of Q. muehlenbergii and Q. prinoides as distinct species. However, W. M. Keith Jr. (1957) states that "Q. muehlenbergii never spreads vegetatively and acorns are rarely borne until it has attained small tree size whereas Q. prinoides bears at extremely small sizes, usually a foot or so high and spreads vegetatively via rhizomes". Therefore, genetics of this accession most likely represents the hybrid of Q. prinoides x Q. muehlenbergii under the assumption that the true Q. prinoides is represented only by those that clonally spread via rhizomes. Further research is needed to clarify the identity of Q. prinoides. This accession is therefore being listed as Q. hybr. Specimens are clearly "dwarf" or shrubby in growth habit and produce acorns at extremely early ages, but do not spread via rhizomes. | 1543547 | Ames 23752 |