Polygonaceae

Oriental lady's thumb

Polygonum posumbu Buch.-Ham. ex D.Don

Family: Polygonaceae
Genus: Polygonum

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Oriental lady's thumb: Persicaria posumbu , Aizu area, Fukushima pref., Japan — Photo: Qwert1234, CC BY-SA 4.0, from Wikimedia Commons

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Common names

By language (4)

Chinese: 丛枝蓼, 花蓼, 丛枝寥, 长尾叶蓼
English: Oriental lady's thumb
Japanese: ハナタデ, ヤブタデ
Korean: 장대여뀌

Synonyms

Persicaria posumbu (Buch.-Ham. ex D.Don) H.Gross
Persicaria yokusaiana (Makino) Nakai
Polygonum caespitosum subsp. yokusaianum (Makino) Danser
Polygonum cespitosum Blume
Polygonum procumbens Y.L.Chang & S.X.Li
Polygonum pronum C.F.Fang
Polygonum yokusaianum Makino

Flowers

In flower: June to October (from 3,075 flowering iNaturalist observations worldwide)

Photos

Photo: Qwert1234, CC BY-SA 4.0, from Wikimedia Commons
Photo: Qwert1234, CC BY-SA 4.0, from Wikimedia Commons
Photo: Qwert1234, CC BY-SA 4.0, from Wikimedia Commons
Photo: Qwert1234, CC BY-SA 4.0, from Wikimedia Commons
Photo: Qwert1234, CC BY-SA 4.0, from Wikimedia Commons
Photo: Alex Abair, CC BY 4.0, from Wikimedia Commons
Photo: Alex Abair, CC BY 4.0, from Wikimedia Commons
Photo: Alex Abair, CC BY 4.0, from Wikimedia Commons
Photo: Alex Abair, CC BY 4.0, from Wikimedia Commons
Photo: Alex Abair, CC BY 4.0, from Wikimedia Commons
Photo: Alex Abair, CC BY 4.0, from Wikimedia Commons
Photo: Alex Abair, CC BY 4.0, from Wikimedia Commons

More in Polygonum

Sources: classification, synonyms from World Flora Online Plant List (2026-06, CC0 1.0); common names, popularity from Wikidata (2026-10-26, CC0 1.0). About our plant data.