07 June 2002
Vol 296, Issue 5574

About The Cover

Cover image expansion

COVER A time series of leaf development for two members of the Apiaceae family-anise (left) and carrot (right). Differences in blade growth (magenta) and marginal growth (cyan) result in final leaf forms that are simple in anise but dissected in carrot. Recent evolution of leaf form included such changes in secondary morphogenesis. 1858 [Image: T. E. Goliber, S. Kessler, N. R. Sinha]