Northeastern Asian Flora - Bidens frondosa

Northeastern Asian Flora

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Bidens frondosa L. (redirected from: Bidens melanocarpa Wiegand)
Family: Asteraceae [Bidens frondosa var. caudata Sherff, more] Images not available	Japan Flora Resources Japan Flora: Stems 1-1.5 m. long, nearly glabrous; leaves and leaflets petiolate, the leaflets 3-5, lanceolate to lanceolate-ovate, 3-13 cm. long, coarsely toothed; heads ligulate; involucral bracts foliaceous, the inner bracts and chaff 5-9 mm. long; ligulate corollas short, yellow; tubular corollas 4-toothed; achenes cuneate, the outer ones 5-7 mm. long, the inner ones 7-10 mm. long, the awns 2.5-5 mm. long. Sept.-Oct. North American weed widely naturalized in lowlands in our area.
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Development supported by College of Agriculture and Life Sciences of Seoul
National University and Korea National Arboretum of Korea Forest Service.

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