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(First upload on February 5 2012. Last on October 25 2017) [ 日本語 | English ]

Dioscoreaceae R. Br. (ヤマノイモ科)

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Engler's syllabus (エングラー体系) About 800 species in eight genera are recorded in the world

mostly distributed in tropical regions One genus is recorded from Japan

Dioscorea L. (ヤマノイモ) in Japan

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D. polystachya Turczaninow (ナガイモ) D. tokoro Makino (オニドコロ) D. nipponica Makino (ウチワドコロ) f. jamesii (Prain et Burkill) Kitag. (ケナシウチワドコロ) D. elephantipes (L'Hér.) Engl. (ツルカメソウ) D. alata L. (ダイジョ) D. asclepiadea Prain et Burkill (ツクシタチドコロ) D. benthamii Prain et Burkill (タイセイイモ) D. bulbifera L. (ニガカシュウ, s.l.) f. spontanea (Makino) Makino et Nemoto (ニガカシュウ, s.s.) f. domestica (Makino) Makino et Nemoto (カシュウイモ) D. cayenensis Lam. (キイロギニアヤム)

D. cirrhosa Lour. (ソメモノイモ) D. collettii Hook. f. (フッケンドコロ) D. cumingii Prain et Burkill (ヤツデドコロ) D. doryphora Hance (タカサゴドコロ) D. esculenta (Lour.) Burkill (トゲイモ, s.l.) var. esculenta (タマゴイモ) var. spinosa (Roxb. ex Prain et Burkill) R.Knuth (トゲイモ, s.s.) D. gracillima Miq. (タチドコロ) D. hispida Dennst. (ミツバドコロ) D. izuensis Akahori (イズドコロ) D. japonica Thunb. (ヤマノイモ) D. luzonensis Schauer (ルゾンヤマノイモ) D. pentaphylla L. (アケビドコロ)

D. persimilis Prain et Burkill (ライシャイモ) D. pseudojaponica Hayata (キールンヤマノイモ) D. quinquelobata Thunb. (カエデドコロ) D. rotundata Poir. (シロギニアヤム) D. septemloba Thunb. var. platyphylla M. Mizush. ex T. Shimizu (コシジドコロ) var. septemloba (キクバドコロ) var. sititoana (Honda et Jotani) Ohwi (シマウチワドコロ) D. tabatae Hatus. ex Yamashita et M. N. Tamura (ユワンオニドコロ) D. tenuipes Franch. et Sav. (ヒメドコロ) D.zentaroana Koidz. (アマミタチドコロ)

Dioscorea polystachya in Hokkaido

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Nagaimo (ナガイモ, 長芋), Chinese yam Lifeform: perennial vine Distribution: Native to eastern Asia, not included Japan (introduced to Japan in or before 17th century) Habitat: moist, and disturbed sites

Tuber (and other organs): edible → wild vegetable (山菜) Vine: twining clockwise Synonyms: Dioscorea batatas Decne., often used Dioscorea opposita Thunb., nom. illeg.

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4 5 6
[1] at the backyard of Japanese Archery Training Hall, Hokkaido University, on July 27 2015. [2-6] climing up a hedge at N28/E3, East Ward, Sapporo. [1-4] on August 18 2011. [5] on September 26 2014. Who transplanted this? I did not think this was Chinese yam when I saw this at the first time in fornt of the apartment. [6] on August 15 2017.