High-climbing woody vine. Stems usually glabrous. Leaves long-petioled, thin, broadly ovate to almost round in outline, palmately 3-7 lobed, 13-20 cm (5-8 in) long, glabrous above, hairy on veins below, lobes acute or acuminate. Inflorescence loose drooping axillary panicles 13-25 cm (5-10 in) long. Flowers small, numerous, apetalous, greenish, blooming in late Spring. Fruits drupes, black and about 25 mm (1 in) long when mature in late Summer. The single seed shallowly cup-shaped.
Distribution: Native to about the southeastern quarter of the U. S.
Habitat: Usually found in floodplain forests.
NWI status: FACW
Comment: Calycocarpum is derived from the Greek words kalyx (cup) and karpos (fruit); lyoni honors the English explorer John Lyon.
Distribution in Oklahoma: 
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Last update: 9/8/99
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