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(First upload on April 11 2016. Last on January 7 2018) [ 日本語 | English ]

Potamogeton L. (ヒルムシロ) in Japan Itomo (イトモ, 糸藻), small pondweed Lifeform: aquatic perennial forb Distribution: widespread between tropical and cool-temperate regions in the world decreasing the populations, in particular, in the southern parts of Japan Habitat: ponds ⇒ wetland (湿原)

Synonyms: Potamogeton pusillus auct. non L.

Potamogeton berchtoldii in Hokkaido

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4 5
[1-3] in the park of Nakatonbetsu Limestone Caves for Communication with Nature (中頓別鍾乳洞自然ふれあい公園), northern Hokkaido, on August 28 2015. [4/5] in the inner moat of Edo Castle, Tokyo, on October 19 2018.