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(First upload on August 1 2010. Last on August 12 2023) [ 日本語 | English ]

Engler's syllabus (エングラー体系)

Saururaceae Martynov

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Nomenclature: Ohwi and Kitagawa (1983) Two genera in Saururaceae are recorded from Japan Saururus L. (ハンゲショウ) S. cernuus L. (アメリカハンゲショウ) S. chinensis (Lour.) Ball. (ハンゲショウ) Houttuynia Thunb. (ドクダミ) H. cordata Thunb. (Dokudami, ドクダミ, 毒溜), lizard tail, or Korean houttuynia Lifeform: deciduous perennial forb Distribution: east Asia, incluidng Japan

Habitat: semi-mesic sites Medical use: aboveground used for diuretic, laxative and detoxification Crude drug name: Houttuyniae herba Ingredient: decanoylacetaldehyde, etc. f. plena (Makino) Okuyama (ヤエドクダミ) f. variegata (Makino) Sugim., n. n. (フイリドクダミ) f. viridis J. Ohara (ミドリドクダミ)

Houttuynia cordata in Japan

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5 6 7
[1] in Oi Pier Seaside Park, Tokyo, on June 3 2016. [2/3] clonal growth observed at Toya Lake Experimental Station, Hokkaido University, on July 22 2010. [4] at Yushima Temple (seido), Tokyo, on May 30 2014. [5] at a bank along Sophia Street, Chiyoda Ward, Tokyo, on May 26 2017. [6] along a paved road in N26E2, East Ward, Sapporo, on June 12 2021. [7] at Kanda Bridge Park, Tokyo, on June 6 2023.

f. plena (ヤエドクダミ)

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[1-3] in the experimental station of medicinal plant studies, Hokkaido University, on July 18 2019.