Reference:Crosswhite1966a
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Verbatim text: Crosswhite, F. S. 1966. Revision of Penstemon section Chamaeleon (Scrophulariaceae). Sida 2: 339–346.
Author: Crosswhite, F.S.
Year: 1966
Title: Revision of Penstemon section Chamaeleon (Scrophulariaceae)
Journal: Sida
Volume: 2
Pages: 339–346