Verbatim text: Les, D. H. 1988c. The evolution of achene morphology in Ceratophyllum (Ceratophyllaceae), III. Relationships of the "facially-spined" group. Syst. Bot. 13: 509-518.
Author: Les, D.H.
Year: 1988c
Title: The evolution of achene morphology in Ceratophyllum (Ceratophyllaceae), III. Relationships of the "facially-spined" group
Journal: Syst. Bot
Volume: 13
Pages: 509–518