Penstemon secundiflorus is a member of Penstemon subg. Penstemon sect. Anularius (Bennett et al. 1987). It is found in Colorado, New Mexico and Wyoming. This specimen was growing in sandy soil at an elevation of 7800 feet. The close-up photo was taken with a ring flash attached to my 50 mm macro lens.|
Bennett, R. W., K. Lodewick, and R. Lodewick. 1987. Penstemon nomenclature. Eugene, OR: American Penstemon Society.
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