Reference:Van1953a
Verbatim text: van Royen, P. 1953. The Podostemaceae of the New World. Part II. Acta Bot. Neerl. 2: 1–20.
Author: Royen, P.
Year: 1953
Title: The Podostemaceae of the New World. Part II
Journal: Acta Bot. Neerl
Volume: 2
Pages: 1–20