USGS - science for a changing world

Northern Prairie Wildlife Research Center

  Home About NPWRC Our Science Staff Employment Contacts Common Questions About the Site

Aquatic and Wetland Vascular Plants of the Northern Great Plains

49. Asteraceae, the Aster Family

3. Bidens L. -- Beggarticks

3. Bidens comosa (A. Gray) Wieg.


Simple and erect to branched and spreading annual 1-12 dm tall, glabrous. Leaves simple, oblong-lanceolate to ovate-lanceolate, 3.5-15 cm long, 0.5-5 cm wide, acuminate, shallowly to sharply toothed and scabrous on the margin, sessile or tapered to a winged, subpetiolate base. Heads discoid, broadly campanulate to hemispheric, 1-2.5 cm across, remaining erect after flowering; outer involucral bracts 5-10 or more, often greatly enlarged and much surpassing the disk. Achenes with 3 retrorsely barbed awns, the body reddish-brown to dark brown at maturity, 3.5-7 mm long, retrorsely barbed on the margins. Aug--Oct. Same habitats as B. cernua; frequent; (ME and Que. to MT, s to NC, TN, NM and UT). B. tripartita L., B. acuta (Wieg.) Britt.
GIF- Distribution Map

Map key


Previous Section -- Bidens cernua L. -- Nodding beggarticks
Return to Family -- Asteraceae - The Aster Family
Next Section -- Bidens connata Muhl. ex Willd. -- Stick-tights

Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: http://www.npwrc.usgs.gov/resource/plants/vascplnt/species/bcom.htm
Page Contact Information: Webmaster
Page Last Modified: Saturday, 02-Feb-2013 06:40:17 EST
Sioux Falls, SD [sdww55]