This is definitely not Penstemon strictus. It looks more like P. linarioides to me. I am copying Glenn Rink, who is writing a Penstemon treatment for Arizona, to see if he concurs.
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Stephen B. Austin
511
2004-08-27
Barbara Austin; Hank Giesecke; George Howe; John Meyer
United States of America, Arizona, Yavapai, Prescott National Forest: Mingus Mountain, Potato Patch Area: Road to woodshute Trailhead, Arizona
34.691165 -112.13589 +-2314m. WGS84
7.5' Hickey Mountain Quadrangle;
Georeferenced to Mingus Mountain with uncertainty radius extending east to nearby Mingus Hang Glider Launch area, encompassing mountain and surrounding area.
2134 meters
7000 FT
in humic soil in a ponderosa pine-juniper woodland.
For additional information about this specimen, please contact: Jennifer Ackerfield, Head Curator of Biodiversity Collections (jennifer.ackerfield@botanicgardens.org)