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(First upload on October 30 2013. Last on November 29 2021) [ 日本語 | English ]

Polygonum L. (タデ) O-oinutade (オオイヌタデ, 大犬蓼), curlytop knotweed Lifeform: large annual forb < 2 m in height Distribution: widespread in the northern hemisphere, including Japan Habitat: roadsides, open lands, etc. HUSTEP: Plants and Plant communities in Japan (flora list) Synonyms: Persicaria lapathifolia (L.) Delarbre var. lapathifolia Persicaria lapathifolia (L.) Gray subsp. nodosa (Pers.) A. Love

Persicaria nodosa (Pers.) Opiz Persicaria tenuiflora (Pers.) H. Hara Polygonum komarovii H. Lev. Polygonum lapathifolium L. ssp. nodosum (Pers.) Fr. Polygonum nodosum Pers. Different taxonomy Persicaria lapathifolia (L.) Delarbre var. lapathifolia (オオイヌタデ) var. incana (Roth) H. Hara (サナエタデ) var. lanata (Roxb.) H. Hara (キヌタデ)

Polygonum lapathifolium in Hokkaido

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1 2 3
4 5 6
[1] beside an artificial pond in front of Sarobetsu Wetland Center, northern Hokkaido, on August 29 2021. [2/3] at a roadside, N10/W1, North Ward, Sapporo, on September 4 2013. [4] along an unpaved road near Zenibako Coast, where wind-power farm is established, near Sapporo on September 16 2020. [5/6] in an openland, N13/W4, North Ward, Sapporo, on November 21 2018. Records: on a trail adjacent to Toyonaka Park along Shojin River, Sapporo, on September 18 2021.