Verbatim text: Les, D. H. 1988b. The evolution of achene morphology in Ceratophyllum (Ceratophyllaceae), II. Fruit variation and systematics of the "spiny-margined" group. Syst. Bot. 13: 73-86.
Author: Les, D.H.
Year: 1988b
Title: The evolution of achene morphology in Ceratophyllum (Ceratophyllaceae), II. Fruit variation and systematics of the "spiny-margined" group
Journal: Syst. Bot
Volume: 13
Pages: 73–86