Bloodroot (Sanguinaria canadensis) next to a tree trunk underneath the Cascade Bridge in Burlington, Iowa. The plant flowers in early spring prior to the emergence of tree foliage.

Details:  Canon EOS 10D,  shutter 1/125 second, aperture f6.7, ISO 100, Canon EF 100 mm macro lens, Canon MR-14EX ring flash.

Selected References:

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 60, P 674.

USDA-NRCS. "Plant profile for Sanguinaria canadensis."  The PLANTS Database (http://plants.usda.gov/ ). National Plant Data Center, Baton Rouge, LA 70874-4490 USA. 2004. < http://plants.usda.gov/cgi_bin/topics.cgi?earl=plant_profile.cgi&symbol=SACA13 > (06 Apr. 2005).