Penstemon pseudospectabilis var. pseudospectabilis
A common and beautiful species, separable into western and eastern subspecies on the presence or absence of glands on the calyces and pedicels. In Mohave, Yuma, and western Pinal and Pima counties and in California is found subsp. typicus Keck, with the glands and with usually glaucous herbage. To the eastward grows the much more abundant, greener, and eglandular subsp. connatifolius (A. Nels.) Keck, type from the Apache trail, Gila or Maricopa County. A beautiful form, apparently a first-generation hybrid between subsp. connatifolius and P. Eatoni subsp. exsertus, collected near Superior was described as P. Crideri A. Nels. The staminode, although normally glabrous in this species, is sparsely bearded toward the apex in a specimen of subsp. typicus from the Kofa Mountains, Yuma County, and in one from Montezuma Well, Yavapai County.
2n = 16
Abrams LR. 1874-1956. An Illustrated flora of the Pacific States: Washington, Oregon, and California. Stanford University: Stanford University Press.