Clematis viorna Linnaeus. Subgenus: Viorna. Northern Leatherflower, Vase-vine. Phen: May-Sep. Hab: Mesic forests, woodlands, thickets, especially over calcareous or mafic rocks. Dist: PA, IL, and MO south to GA and AR.
Origin/Endemic status: Native
Syn: = Viorna viorna (L.) Small – S; < Clematis viorna L. – Ar, C, F, FNA3, G, Il, K1, K3, K4, Pa, RAB, Tn, Va, W