A new hexastylis (Aristolochiaceae) from Transylvania county,north Carolina

Hexastylis rhombiformis, a new species from the North Fork of the French Broad River in Transylvania County, North Carolina, is described and illustrated. It can be separated from other species ofHexastylis by the distinctive shape of its flower (rhombic-ovate) and by the ridged reticulation of unusually high relief (1–2 mm) on the lower inside wall of the flower. Its distribution, relationship to other species ofHexastylis, and origin are discussed.