Verbatim text: van Royen, P. 1954. The Podostemaceae of the New World. Part III. Acta Bot. Neerl. 3: 215–263.
Author: Royen, P.
Year: 1954
Title: The Podostemaceae of the New World. Part III
Journal: Acta Bot. Neerl
Volume: 3
Pages: 215-263