Verbatim text: Les, D. H. 1986b. The evolution of achene morphology in Ceratophyllum (Ceratophyllaceae), I. Fruit spine variation and relationships of C. demersum, C. submersum, and C. apiculatum. Syst. Bot. 11: 549-558.
Author: Les, D.H.
Year: 1986b
Title: The evolution of achene morphology in Ceratophyllum (Ceratophyllaceae), I. Fruit spine variation and relationships of C. demersum, C. submersum, and C. apiculatum
Journal: Syst. Bot
Volume: 11
Pages: 549–558