Canada Lettuce flower and leaf sketch (Lactuca canadensis) growing on a dam embankment at Lake Goede in Iowa.

Details: Canon EOS 10D,  shutter 1/180 second, aperture f22, ISO 1600, Canon EF 100 mm macro lens, Canon MR-14EX flash on

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 300, P 404-405.

USDA-NRCS. "Plant profile for Lactuca 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/plant_profile.cgi?symbol=LACA > (12 Sep. 2004).