Reference:Straw1956a
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Verbatim text: Straw, R. M. 1956. Adaptive morphology of the Penstemon flower. Phytomorphology 6: 112–119.
Author: Straw, R.M.
Year: 1956
Title: Adaptive morphology of the Penstemon flower
Journal: Phytomorphology
Volume: 6
Pages: 112–119