You are not currently logged in.
Access your personal account or get JSTOR access through your library or other institution:
Evidence on Rates of Evolution from the Distribution of Existing and Fossil Plant Species
G. Ledyard Stebbins, Jr.
Vol. 17, No. 2 (Apr., 1947), pp. 149-158
Published by: Wiley
Stable URL: http://www.jstor.org/stable/1943261
Page Count: 10