Robinia hartwigii Koehne. Granite Dome Locust, Highlands Locust, Hartwig's Locust. Phen: Jun-Jul; Aug-Sep. Hab: Forests and outcrop edges on high elevation granitic domes, also clearings; disjunct in longleaf pine sandhills. Dist: Apparently endemic to a small area around Highlands, NC; and disjunct in the Sandhills of SC (Aiken County; Patrick McMillan, pers. comm., 2015).
Origin/Endemic status: Endemic
Syn: = RAB, S; = Robinia viscosa var. hardwegii – Ashe (1922), orthographic variant; = Robinia viscosa var. hartwegii – K1, orthographic variant; = Robinia viscosa var. hartwigii – K3, K4, SE3, Isely & Peabody (1984), Peabody (1984); < Robinia viscosa – W