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(First upload on December 28 2008. Last on November 1 2015) [ 日本語 | English ]

Nuphar japonica DC.






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

⇒ Engler's syllabus (エングラー体系)

Nymphaeaceae Salisb. (スイレン)


≈ 100 species in 8 genera in the world, 5 genera in Japan
Lifeform: Aquatic forbs, producing long leaf stalks, rhizomes in the muddy soil
Flower: trimerous hermaphrodite
Barclaya Wallich (→ Barclayaceae, when separated)
Euryale Salisb. (E. ferox Salisb. オニバス), annual aquatic plants (→ Euryalaceae, when separated)
Nuphar Sibth. et Sm. (コウホネ)
Nymphaea L. (スイレン)
Ondinea Hartog (when separated from Nymphaea)
Victoria Lindley (オオオニバス), annual aquatic plants

Nelumbo Bercht. et J. Presl (ハス) ⇒ separated to Nelumnbonaceae (ハス)

Nuphar Sibth. et Sm. (コウホネ)


Confusing group
N. japonica DC. (コウホネ/コオホネ)
N. oguraensis Miki (オグラコウホネ), south to Honshu

var. akiensis Shimoda (ベニオグラコウホネ)

N. submerusa Shiga et Kadono (シモツケコウホネ)
N. pumila (Timm) DC. (ネムロコウホネ)
N. subintegerrima (Casp.) Makino (ヒメコウホネ), Honshu and Shikoku

Nuphar japonica in Hokkaido


Kouhone (コウホネ, 河骨), cow lily (s.l.)
Lifeform: perennial forb
Distribution: Korea - Japan

Field trip: Nature on lakes, volcanoes, sea and forests (フィールド体験研修 海と湖と火山と森林の自然)

Habitat: halophyte (ponds, lakes, shallow streams, etc.) ⇒ wetland (湿原)
var. saijoensis Shimoda (サイジョウコウホネ)
f. rubrotincta (Casp.) Kitam. (ベニコウホネ)
索引

ST1 ST2
ST3 ST4
[1/2] in Otarumappu Pond near Tomakomai City, Hokkaido, Japan, in the summer of 1987 (or 1986). [3] along a tiny trail for looking around small islands in O-numa Park, southern Hokkaido, on July 7 2013. [4] in a pond on Tsukiura Forest Park faced to Toya Lake on September 15 2015.

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