10 February 2006
Vol 311, Issue 5762

About The Cover

Cover image expansion

COVER Clarkia breweri, a California annual, is a small plant that is pollinated by hawkmoths. Its intensely scented flowers synthesize more than 10 different volatile compounds. As discussed in the special section in this issue, this plant is one of several used for the study of the volatile chemicals produced by plants for communication and defense. See page 803. Image: David Bay and Eran Pichersky