Photo by: Andrea D. Wolfeİ
Location: Grand County, Colorado
Penstemon cyathophorus is a member of Penstemon subg. Penstemon sect. Anularius (Bennett et al. 1987). It is found in Colorado and Wyoming. This specimen was growing in sandy soil at an elevation of 8500 feet. The close-up photo was taken with a ring flash attached to my 50 mm macro lens.
Bibliography and suggested readings
Bennett, R. W., K. Lodewick, and R. Lodewick. 1987. Penstemon nomenclature. Eugene, OR: American Penstemon Society.
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Last updated August 3, 2000.