Orbexilum, commonly called leather-root,[2] is a genus of
flowering plants in the
legume family (
Fabaceae). They are native to North America, where they are found in the United States and Mexico, south to
Chiapas.[3]
This genus can be distinguished from other genera in the Psoraleeae by its "thick glabrous pod walls that are distinctively rugose and by [a] calyx that is scarcely accrescent."[4]
Taxonomy
The genus was described by
Constantine Samuel Rafinesque in 1832, with the type species O. latifolia, moved from Psoralea.[5] (O. latifolia is now considered a
synonym of O. onobrychis.[6]) Rafinesque differentiated Orbexilum from Psoralea largely on the basis of features of the
calyx.[7]
^LeGrand, H; Sorrie, B (2021).
"Account for Bigleaf Scurfpea". Vascular Plants of North Carolina. North Carolina Biodiversity Project and North Carolina State Parks. Retrieved May 26, 2021.