| Author | (Rowlee in Small) Rydberg | |
| Distribution | Considered to be extinct. The only records anywhere (in the world) were from the Tryon Peak and/or White Oak Mountain area of Polk County, along the Blue Ridge Escarpment. It was first seen in 1897 and collected again in 1899, and never found again, despite many more recent searches in that area. Though definitely a good species, its placement in the genus Orbexilum (formerly Psoralea) is presumptive based on vegetative and floral characters, as fruits are unknown (according to Isely 1990). | |
| Abundance | Extinct. Obviously, it was extremely rare and very local even when discovered in the latter part of the 19th Century. The species is listed as State Special Concern - Historical. | |
| Habitat | It grew on wooded slopes. As this part of the county has much high pH soil, including most slopes on these mountains, it likely grew in Basic Mesic Forest or Rich Cove Forest, if not the drier Basic Oak-Hickory Forest, natural communities. | |
| Phenology | Bloomed in June. | |
| Identification | This was a fairly robust herb, growing to 2-3 feet tall, with trifoliate leaves. The leaflets were rather large and widely ovate, being about 2.5-3 inches long and 2 inches wide. The flowering stalks must have been quite impressive, as they grew to 5-8 inches tall, with a scattering of purple flowers. | |
| Taxonomic Comments | Formerly named as Psoralea macrophylla.
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| Other Common Name(s) | Largeleaf Leather-root | |
| State Rank | SX | |
| Global Rank | GX | |
| State Status | SC-H | |
| US Status | | |
| USACE-agcp | | |
| USACE-emp | | |
