|Photo by Bob Upcavage, Atlas of Florida Vascular Plants|
|Division:||Magnoliophyta - Flowering plants|
|Class:||Magnoliopsida – Dicotyledons|
|Family:||Fabaceae ⁄ Leguminosae|
| Orbexilum lupinellus|
|Natural range of Orbexilum lupinellus from USDA NRCS Plants Database.|
Common names: Piedmont leather-root; Lupine scurfpea
Synonyms: Orbexilum lupinellum (Michx.) Isley; Psoralea lupinellus Michx.; Rhytidomene lupinellus (Michaux) Rydberg
Habitats of O. lupinellus are sandhills, sandy pine-oak woods, scrub oak ridges, longleaf pine forests, slopes and upland oak-pine woods.  Has been observed to grow on loamy sand soils.  In a study comparing N2 fixation potential in nine legume species occurring in longleaf pine-wiregrass ecosystems, O. lupinellus had the lowest potential for N2 fixation. Associated species include Pinus palustris, Quercus laevis, Q. incana, Q. stellata, and Aristida stricta.  Is also seen in human disturbed areas such as clearing of pinewoods and disked areas. 
This species is thought to be dispersed by gravity.
Has been observed to grow in recently burned longleaf pine forest. 
Conservation and management
Cultivation and restoration
References and notes
- Florida State University Robert K. Godfrey Herbarium database. URL: http://herbarium.bio.fsu.edu. Last accessed: March 2016. Collectors: Collectors: William B. Fox, Robert K. Godfrey, H. E. Ahles, J. Haesloop, R. Kral, Wayne R. Faircloth, Steve L. Orzell, E. L. Bridges, Loran C. Anderson, Sidney McDaniel, D. J. Ockendon, O. Lakela, A.H. Curtiss, and Mr. and Mrs. R.H.A. Davis, R.A. Norris. States and Counties: Florida: Clay, Duval, Hamilton, Hillsborough, Leon, Madison, Suwannee, Taylor, Walton. Alabama: Autauga. Georgia: Baker, Lowndes, Thomas. North Carolina: Moore, Scotland.
- Cathey, S. E., L. R. Boring, et al. (2010). "Assessment of N2 fixation capability of native legumes from the longleaf pine-wiregrass ecosystem." Environmental and Experimental Botany 67: 444-450.
- Kirkman, L. Katherine. Unpublished database of seed dispersal mode of plants found in Coastal Plain longleaf pine-grasslands of the Jones Ecological Research Center, Georgia.