PLANT: Erect or vining perennial herbs. LEAVES: opposite. FLOWERS: solitary, axillary, perfect; corolla funnelform; anthers not connivent. FRUIT: terete. SEEDS: naked. NOTES: 5 spp. native to Eur., n Afr., w Asia (abbreviated from Pliny's Vincapervinca). REFERENCES: McLaughlin, Steven, P. 1994. Apocynaceae. J. Ariz. – Nev. Acad. Sci. Volume 27, 164-168.