Verbatim text: Rosendahl, C. O., F. K. Butters, and O. Lakela. 1936. A monograph on the genus Heuchera. Minnesota Stud. Pl. Sci. 2: 1–180.
Author: Rosendahl, C.O., Butters, F.K., Lakela, O.
Year: 1936
Title: A monograph on the genus Heuchera
Journal: Minnesota Stud. Pl. Sci
Volume: 2
Pages: 1–180