Verbatim text: Wiersema, J. H. 1987. A monograph of Nymphaea subgenus Hydrocallis (Nymphaeaceae). Syst. Bot. Monogr. 16: 1-112.
Author: Wiersema, J.H.
Year: 1987
Title: A monograph of Nymphaea subgenus Hydrocallis (Nymphaeaceae)
Journal: Syst. Bot. Monogr
Volume: 16
Pages: 1–112