Polygonum posumbu Buch.-Ham. ex D. Don
[Polygonaceae]
Hanatade (ハナタデ, 花蓼)
Lifeform: annual forb
Distribution: temperate and tropical Asia, including Hokkaido
Habitat: on lightly-shady, moist soils
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 subsp. yokusaianum (Makino) Danser
Polygonum caespitosum Blume var. laxiflorum Meisn.
Polygonum posumbu Buch.-Ham. ex D. Don
Polygonum posumbu Buch.-Ham. ex D. Don var. laxiflorum (Meisn.) Ohwi
Polygonum yokusaianum Makino
Polygonum posumbu in Hokkaido
[Left] a colony. [Right] close-up of leaves and inflorescences. At the edge of Keiteki-no-mori forest in Hokkaido University campus on August 31 2009.
Near a junglezym in Tomakomai Experimental forest on September 10 2009.