Wild plants in and around Shimane 島根とその周辺の野生植物


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Ambrosia antemisiaefolia / Butakusa ブタクサ

Bloom time: July-October

Asteraceae /


Species in the genus Ambrosia:

Ambrosia antemisiaefolia / Butakusa

Ambrosia antemisiaefolia / Butakusa ブタクサ

Ambrosia antemisiaefolia is an annual herb originating in North America, growing wild in various districts, and reportedly being a cause of pollenosis from summer through autumn. Stems generally have vellus hairs and rise to 0.3-1m in height. Leaves are tender, opposite on lower parts, alternate on upper legs, and bipinnately cut in deeply. Male flower heads, 3-4mm in diameter, set themselves in slender racemes facing downward, and female flower heads gather together at axils at the bases of the inflorescences in a nearly unnoticeable way. Bloom time: July-October.




inserted by FC2 system