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(First upload on August 27 2012. Last on March 3 2017) [ 日本語 | English ]

Triadenum Raf. (ミズオトギリ) MIzu-otogiri (ミズオトギリ, 水弟切) Lifeform: rhizomatous, perennial forb < 70 cm high Distribution: China - Far East - Japan Habitat: wetland (湿原), represented by fen and swamp Stamen: 9 (3 × 3) Flower: red - purple Leaf: developing pale glands only (lacking dark glands) Chromosome number: 2n = 36

var. humile Y. Kimura (ヌマオトギリ) Varieties (discarded)

Triadenum japonicum in Hokkaido

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1 2 3
4 5 6
[1/2] in Abira wetland, central Hokkaido, on July 16 2012. [3] near Akanuma (Red Pond) in Kushiro Wetland, eastern Hokkaido, on August 30 2014. [4-6] along the shore of Echigo Pond in Ebetsu City on October 8 2017.