Northern Prairie Wildlife Research Center
Aquatic and Wetland Vascular Plants of the Northern Great Plains
49. Asteraceae, the Aster Family
3. Bidens L. -- Beggarticks
4. Bidens connata Muhl. ex Willd. -- Stick-tights
Erect to spreading, glabrous annual 1-8 dm tall. Leaves simple and toothed
or the lower ones incised to ternate, 4-15 cm long, 0.5-4 cm wide, acuminate,
subsessile or tapering to a winged petiolate base. Heads discoid, campanulate
to hemispheric, 1-2 cm across; outer involucral bracts 4-9, usually not
much exceeding the head. Achenes with 2-4 retrorsely barbed awns, the
body brown at maturity, 3.5-7 mm long, antrorsely barbed on the margins (and
often on the faces), at least toward the base. Aug--Oct. Same habitats as B.
cernua; c and e NE and scattered n to se ND; (N.S. and Que. to MN and se
ND, s to NJ, MO and KS). B. tripartita L.
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