812 MISC. PUBLICATION 4 2 3, U. S. DEPT. OF AGRICULTURE 



12. Penstemon cobaea Nutt., Amer. Phil. Soc. Trans, ser. 2, 5: 182. 



1837. 



Penstemon hansonii A. Nels., Wyo. Univ. Pubs. Bot. 1: 129. 

 1926. 



Flagstaff (Coconino County), apparently escaped from cultivation 

 or introduced (Hanson 709, the type of P. hansonii). Southeastern 

 Nebraska to southern Texas. 



A showy plant, known in Texas as "foxglove," a name properly 

 applied to the Old World Digitalis purpurea. 



13. Penstemon jamesii Benth. in DC, Prodr. 10: 325. 1846. 

 Apache County to Mohave and Yavapai Counties, 4,500 to 7,000 



feet, frequent in sandy soils, in the pinyon-j uniper and yellow -pine 

 associations, May and June. Southwestern Colorado, southern 

 Utah, western New Mexico, and northern Arizona. 



Typical P. jamesii occurs east of the Continental Divide, in New 

 Mexico and western Texas. The staminode in this species is con- 

 spicuously bearded and exserted. The Arizona form is subsp. 

 ophianthus (Pennell) Keck (P. ophianthus Pennell, P. pilosigulatus A. 

 Nels., type of the latter from Flagstaff, Hanson 554). The corolla 

 is lavender, veined with darker purple. Subsp. breviculus Keck, of 

 northwestern New Mexico and adjacent Colorado, may be looked for 

 in the northeastern corner of the State. It lacks glandular pubes- 

 cence within the corolla, which is only 14 to 16 mm. long and scarcely 

 inflated. 



Penstemon pulchellus Lindl. is to be expected in Cochise County, being found in 

 southwestern New Mexico. It has thin, finely serrate, lanceolate, nonperfoliate, 

 essentially glabrous leaves, and abruptly much inflated, showy corollas. 



14. Penstemon palmeri A. Grav, Amer. Acad. Arts and Sci. Proc. 7: 



379. 1868. 



Coconino, Mohave, and Yavapai Counties, 3,500 to 6,500 feet, 

 frequent in washes and at roadsides in the sagebrush and pinyon 

 regions, May and June, type from Skull Valley, Yavapai County 

 (Coues and Palmer 228). Utah and Arizona to California. 



This is one of the handsomest species of Penstemon and is addition- 

 ally notable for its delicate fragrance. The common form is subsp. 

 typicus Keck, with calyces, pedicels, and peduncles glandular-pu- 

 bescent; but in northernmost Mohave and Coconino Counties and 

 adjacent Utah is found the subsp. eglandulosus Keck, in which these 

 parts are glabrous (pi. 28). 



Penstemon petiolatus T. S. Brandeg. is to be looked for in the northwestern 

 corner of the State. It is a rare plant of the Beaver Dam Mountains, Washington 

 County, Utah, and of southern Nevada, of low, shrubby habit (10 to 20 cm. high), 

 and with dentate pruinose-puberulent leaves only 10 to 25 mm. long. 



15. Penstemon clutei A. Nels., Amer. Bot. 33: 109. 1927. 

 Coconino County, about 7,000 feet, very local in the region about 



Sunset Crater, northeast of Flagstaff, in volcanic cinders, June and 

 July, type collected by W. N. Clute in 1923. Known only from 

 Arizona. 



16. Penstemon pseudospectabilis M. E. Jones, Contrib. West. Bot. 



12: 66. 1908. 

 Southern Coconino and Mohave Counties, southward and eastward 

 to Cochise, Pima, and Yuma Counties, 2,000 to 6,500 feet, open land, 



