Chinese yam (Dioscorea polystachya)

Chinese yam, a reference photo — Photo: Public domain

Dioscorea polystachya or Chinese yam (shānyào, simplified Chinese: 山药; traditional Chinese: 山藥), also called cinnamon-vine, is a species of flowering plant in the yam family. It is sometimes called Chinese potato or by its Korean name ma. It is also called huaishan in Mandarin and wàaih sāan in Cantonese.

From Wikipedia, under CC BY-SA 4.0.

Is it poisonous?

We have no record of Chinese yam being toxic, poisonous or venomous. That is not proof that it is safe. Never eat, touch or handle a wild plant, mushroom or animal on the strength of an identification; ask someone qualified.

Easily confused with

Dioscorea tokoro
Dioscorea floridana
Dioscorea collettii
Dioscorea japonica
Dioscorea edulis

Classification

Kingdom: Plantae
Phylum: Tracheophyta
Class: Liliopsida
Order: Dioscoreales
Family: Dioscoreaceae
Genus: Dioscorea
Species: Dioscorea polystachya

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