E-Flora BC: Electronic Atlas of the Flora of British Columbia

Bidens frondosa L.
common beggarticks (devil's beggartick)
Asteraceae (Aster family)

Introduction to Vascular Plants

© Jamie Fenneman  Email the photographer   (Photo ID #14548)

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Distribution of Bidens frondosa
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Species Information

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General:
Annual herb from a fibrous root; stems erect, branched, sparsely spreading-hairy to glabrous, 0.2-1.2 m tall.
Leaves:
Basal leaves lacking; stem leaves pinnately compound with 3-5 lanceolate, stalked, opposite, saw-toothed leaflets up to 2-10 cm long and 0.5-3 cm wide, sometimes sparsely short-hairy below.
Flowers:
Heads with ray and disk flowers, sometimes discoid, bell-shaped to hemishperic, few to many in an open inflorescence; involucres 8-12 mm wide; involucral bracts in 2 dissimilar series, the outer ones 5-8, green, leafy, unequal, erect to ascending, linear-lanceolate, longer than the disk, 0.5-2 (rarely 6) cm long, the inner ones erect, oblong, mostly 5-9 mm long; ray flowers 1-5 or sometimes lacking, yellow, 8-12 mm long, shorter than the involucral bracts; disk flowers orange, about 2 mm long.
Fruits:
Achenes 5-10 mm long, dark brown or blackish, narrowly wedge-shaped, compressed, strongly nerved on each face; pappus of 2 retrorsely or antrorsely barbed awns, 3-4.5 mm long.

Source: The Illustrated Flora of British Columbia

USDA Species Characteristics

Flower Colour:
Yellow
Blooming Period:
Late Summer
Fruit/Seed characteristics:
Colour: Brown
Present from Summer to Fall
Source:  The USDA

Habitat / Range

Mesic to wet ditches, streambanks, meadows and disturbed areas in the lowland, steppe and montane zones; infrequent throughout BC; introduced from E North America.

Source: The Illustrated Flora of British Columbia

Climate

The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Synonyms and Alternate Names

Bidens frondosa var. anomala Porter ex Fernald
Bidens frondosa var. caudata Sherff
Bidens frondosa var. pallida Wiegand
Bidens frondosa var. stenodonta Fernald & H. St. John

Taxonomic and Nomenclatural Links

Additional Photo Sources

Related Databases

General References