Verbatim text: Nowicke, J. W. and J. J. Skvarla. 1981. Pollen morphology and phylogenetic relationships of the Berberidaceae. Smithsonian Contr. Bot. 50: 1-83.
Author: Nowicke, J.W., Skvarla, J.J.
Year: 1981
Title: Pollen morphology and phylogenetic relationships of the Berberidaceae
Journal: Smithsonian Contr. Bot
Volume: 50
Pages: 1–83