Bidens bipinnata L., Asteraceae

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Present on Pacific Islands?  no

Primarily a threat at high elevations?  no

Common name(s): [more details]

English: bipinnate beggar's tick, cobbler's pegs, Spanish needle

Habit:  herb

Description:  "Annual, 0.3-1.5 m tall; stems ± square; leaves 2-3 times pinnately dissected or compound with numerous segments, the segments deltoid-lanceolate; petioles 20-50 mm long; outer phyllaries 7-10, linear, 3-7 mm long; inner phyllaries 5-9 mm long; achenes linear, quadrangular, usually 10-18 mm long, 0.6-1 mm in diameter; pappus awns 2-4 mm long"  (Diggs et al., 1999; p. 326).

Habitat/ecology:  In Texas (U.S.), "in moist soils" (Diggs et al., 1999; p. 326).

Propagation:  Seed

Native range:  "Worldwide weed, probable origin neotropics & subtropics" (GRIN).

Presence:

Pacific Rim
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
Australia Australia (continental)	Australia (continental)		Holm, Leroy/Pancho, Juan V./Herberger, James P./Plucknett, Donald L. (1979) (p. 45)
Taiwan Taiwan	Taiwan Island		Holm, Leroy/Pancho, Juan V./Herberger, James P./Plucknett, Donald L. (1979) (p. 45)
United States (west coast) United States (west coast states)	USA (California)	native	U.S. Dept. Agr., Nat. Res. Cons. Serv. (2009)

Additional information:
Additional online information about Bidens bipinnata is available from the Hawaiian Ecosystems at Risk project (HEAR).

Information about Bidens bipinnata as a weed (worldwide references) may be available from the Global Compendium of Weeds (GCW).

Taxonomic information about Bidens bipinnata may be available from the Germplasm Resources Information Network (GRIN).

References:

Diggs, George M./Lipscomb, Barney L./O'Kennon, Robert J. 1999. Illustrated flora of north central Texas.

Holm, Leroy/Pancho, Juan V./Herberger, James P./Plucknett, Donald L. 1979. A geographical atlas of world weeds. John Wiley & Sons, New York. 391 pp.

Smith, Nicholas M. 2002. Weeds of the wet/dry tropics of Australia - a field guide. Environment Centre NT, Inc. 112 pp.

U.S. Dept. Agr., Agr. Res. Serv. 2009. National Genetic Resources Program. Germplasm Resources Information Network (GRIN). Online searchable database.

U.S. Dept. Agr., Nat. Res. Cons. Serv. 2009. The PLANTS Database. National Plant Data Center, Baton Rouge, LA 70874-4490 USA.