Details:  Canon EOS 10D,  shutter 1/180 second, aperture f16, ISO 400, Canon EF 100 mm macro lens, Canon MR-14EX flash on

Selected References:

Bailey, Tom. "Blue Lettuce." Prime Focus Iowa. <http://www.primefocus-iowa.com/BlueLettuce.html > (12 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. P 405.

USDA-NRCS. "Plant profile for Lactuca tatarica (L.) C.A. Mey. var. pulchella (Pursh) Breitung." 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=LATAP >  (12 Sep. 2004).