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20b. Dioscorea esculenta var. spinosa (Roxburgh ex Prain & Burkill) R. Knuth in Engler, Pflanzenr. 87(IV. 43): 189. 1924.
有刺甘薯 you ci gan shu
Dioscorea aculeata Linnaeus var. spinosa Roxburgh ex Prain & Burkill, J. Proc. Asiat. Soc. Bengal 10: 20. 1914.
Plants with thorny roots protecting crown of rootstock.
Cultivated. Hainan, Taiwan [native to India, Malaysia, Papua New Guinea, and Thailand].
Wu Zhengyi (editor’s note) believes that var. spinosa may be the wild form of this long-cultivated species.
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