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(Upload on Feb. 20 2010) [ 日本語 | English ]

Xanthium L. (オナモミ) O·onamomi (オオオナモミ, 大葈耳), rough cocklebur Lifeform: annual forb Distribution: originally in the north America (firstly reported in 1929 from Japan) Hokkaido Blue List: A3

Habitat: open fields in urbanized regions Field training on integrated environmental research (統合環境調査法実習) (fauna and flora 種リスト) Seed dispersal: external animal Poisonous plant

Xanthium occidentale in Hokkaido

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[1-3] in a small, abondoned parking lot at N25/W3, North Ward, Sapporo, on August 30 2010.