Reference:Pippen1968a
Verbatim text: Pippen, R. W. 1968. Mexican “cacalioid” genera allied to Senecio (Composite). Contr. U.S. Natl. Herb. 34: 365–447.
Author: Pippen, R.W.
Year: 1968
Title: Mexican “cacalioid” genera allied to Senecio (Composite)
Journal: Contr. U.S. Natl. Herb
Volume: 34
Pages: 365–447