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(First upload on June 9 2018. Last on August 3 2021) [ 日本語 | English ]

Sium L. (ヌマゼリ) Numazeri (ヌマゼリ, 沼芹, s.l.), water parsnip, hemlock waterparsnip Sawazeri (サワゼリ, 沢芹) Lifeform: perennial forb Distribution: Asia, including Japan, and North America Habitat: mesic sites, represented by wetlands Involucral scale: present ⇔ Cicuta virosa: absent Synonyms: Sium suave Walter var. ovatum (Yatabe) H. Hara f. nipponicum (Maxim.) Hiyama Sium nipponicum Maxim.

Sium suave Walter ssp. nipponicum (Maxim.) Sugim. var. nipponicum (Maxim.) H. Hara (ヌマゼリ, s.s.) Distribution: northeastern China - Korea - Japan Leaflet: less than 10 var. ovatum (Yatabe) H. Hara (ヒロハヌマゼリ) Synonyms: var. nipponicum (Maxim.) H. Hara f. ovatum (Yatabe) Kitag. var. suave (トウヌマゼリ), Hokkaido and Honshu Habitat: mesic grasslands and wetlands Leaflet: 7-17 Synonyms: var. tenuissimum Kitag. f. angustissimum (Kom.) Kitag.

Sium suave in Hokkaido

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1 2 3
[1] along Katsura Course in Nopporo Forest Park on July 17 2021. [2/3] in the Sarakito-omanai forest preserve for inspection of a planned wind power in Kamiyuchi, northern Hokkaido, on November 1 2017.