Verbatim text: Dietz, R. A. 1952. Variation in the perfoliate uvularias. Ann. Missouri Bot. Gard. 39: 219–247.
Author: Dietz, R.A.
Year: 1952
Title: Variation in the perfoliate uvularias
Journal: Ann. Missouri Bot. Gard
Volume: 39
Pages: 219–247