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(Upload on October 30 2023) [ 日本語 | English ]

Dioscorea L. (ヤマノイモ) Onidokoro (オニドコロ, 鬼野老), Tokoro mountain yam Lifeform: dioecious, perennial vine Distribution: eastern Asia (China - Korea- Japan, including Hokkaido) Habitat: thickets in lowland and foothills

Shoot and rhizome: bitter ≠ wild vegetable (山菜), containing dioscorine, dioscin, diosoreasapotoxin, etc. Use: dried rhizomes used as medicine Chromosome number 2n = 20 (♀: 2n = 18 + XX. ♂: 2n = 18 + XY Synonyms: Dioscorea yokusai Prain et Burkill

Dioscorea tokoro in Japan

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[1-3] in front of Omiya Shrine in Izu-Oshima Island (伊豆大島), on June 7 2023.