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(First upload on September 13 2009. Last on February 2 2017) [ 日本語 | English ]

Polygonum L. (タデ) Hanatade (ハナタデ, 花蓼), Oriental lady's thumb Yabutade (ヤブタデ, 藪蓼) Lifeform: annual forb Distribution: temperate and tropical Asia, including Hokkaido Habitat: on lightly-shady, moist soils HUSTEP: Plants and Plant communities in Japan (flora list) Flowering: August - October Synonyms: Persicaria posumbu (Buch.-Ham. ex D. Don) H. Gross (s.l.), standard

Persicaria posumbu (Buch.-Ham. ex D. Don) H. Gross var. laxiflora (Meisn.) H. Hara (s.s.) Persicaria yokusaiana (Makino) Nakai Persicaria yokusaiana (Makino) Nakai f. laxiflora (Meisn.) Hiyama Polygonum caespitosum Blume Polygonum caespitosum Blume ssp. yokusaianum (Makino) Danser Polygonum caespitosum Blume var. laxiflorum Meisn. Polygonum posumbu Buch.-Ham. ex D. Don var. laxiflorum (Meisn.) Ohwi Polygonum yokusaianum Makino

Polygonum posumbu in Japan

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[1] near a junglezym in Tomakomai Experimental Forest (TOEF) on September 10 2009.[2/3] at the backyard of Toya Lake Experimental Station on September 13 2016. [4] at a ditch near a tennis court in Hokkaido University Campus on September 2 2013. [5/6] in Hama-rikyu Gardens, Tokyo, on November 13 2015. Discard: at the edge of Keiteki-no-mori Forest on August 31 2009. a grassland dominated by P. posumbu at a garden in front of TOEF Office Building on August 23 2012. At the edge of Keiteki-no-mori Forest (恵迪の森) in Hokkaido University campus on September 11 2015.