Read a taxonomic advisory regarding Sandvine and Swallow-wort from Alan Weakley and the Southern Appalachian Botanical Society.
Stalked clusters of small flowers in axils. Petals erect, spreading slightly, per Wildflowers of the Southern Mountains.
Leaves long-stalked, triangular, with a wide rounded basal sinus, per Wildflowers of the Southern Mountains.
Follicles smooth, lance-ovoid, 11-16cm long, per Vascular Flora of the Carolinas.