Verbatim text: Fernald, M. L. and B. H. Long. 1914. The American variations of Potentilla palustris. Rhodora 16: 5–11.
Author: Fernald, M.L., Long, B.H.
Year: 1914
Title: The American variations of Potentilla palustris
Journal: Rhodora
Volume: 16
Pages: 5–11