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

Triadenum japonicum (Blume) Makino






Mount Usu / Sarobetsu post-mined peatland
From left: Crater basin in 1986 and 2006. Cottongrass / Daylily

索引

Triadenum Raf. (ミズオトギリ)


T. brevifolium (Wall. ex Dyer) Y. Kimura (タイワンミズオトギリ)
T. japonicum (Blume) Makino (ミズオトギリ)
T. virginicum Raf. (アメリカミズオトギリ), marsh St. Johnswort

Triadenum japonicum in Hokkaido


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)

ST1 ST2 ST3
ST4 ST5 ST6
[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] ***.

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