|
|
Wild Yam, Dioscorea villosa
|
Chinese Yam, Dioscorea polystachya
|
Key to the Dioscorea Species of Northeastern North America
1a. Vine from rhizomes; leaf axils without aerial tubers; mature petioles nearly circular in cross section; leaves ovate-cordate, the sides evenly convex, basal lobes absent; fruits winged..... Dioscorea villosa
1b. Vine from woody tuber; leaf axils often with aerial tubers; mature petioles strongly channeled; leaves hastate, sides with some concavity, basal lobes usually present; fruits unknown in North America..... Dioscorea polystachya
Dioscorea polystachya Turcz. – Chinese Yam, Cinnamon Vine
Introduced; NYS Prohibited; present in NYC. Description. iNaturalist observations from New York City. GloBI interactions.
Indiana non-native plant invasiveness ranking form. Pest Risk Management Document for Dioscorea polystachya (Chinese yam) in Canada
Dioscorea villosa L. – Wild Yam
Indigenous; (CoC 6); present in NYC. Description. iNaturalist observations from New York City. GloBI interactions.