Big Devils Beggartick and leaf sketch (Bidens vulgata Green) growing in an open field next to a road at Big Hollow Recreation Area in Des Moines county, Iowa.

Details:  Canon EOS 10D,  shutter 1/1000 second, aperture f8, ISO 400, Canon EF 100 mm macro lens, no flash

Selected References:

Hilty John. "Common Beggar-ticks (Bidens frondosa)." Illinois Wildflowers (http://www.illinoiswildflowers.info/ )<http://www.illinoiswildflowers.info/prairie/plantx/cm_beggarticksx.htm > (28 Sep. 2004).

Thieret John W, Niering William A, and Olmstead Nancy C. National Audubon Society Field Guide to North American Wildflowers, Eastern Region. New York: Alfred A. Knopf, Inc. Plate 282, P 378.

USDA-NRCS. "Plant profile for Bidens aristosa."  The PLANTS Database (http://plants.usda.gov/ ). National Plant Data Center, Baton Rouge, LA 70874-4490 USA. 2004. <http://plants.usda.gov/cgi_bin/plant_profile.cgi?symbol=BIAR > (28 Sep. 2004).