PENNELL—SCROPHULARIACEAE OF THE ROCKY MOUNTAINS. 379 
mid-May to late July. Western slope of Wasatch Mountains from Weber to Utah 
counties, Utah. 
Uraw: Davis: Farmington Canyon, Pammel & Blackwood 3659 (M). Salt Lake: Big 
Cottonwood Canyon, Pennell 6067 (H, M, R, U, Y), 6068 (U, Y); South Fork of 
Big Cottonwood Creek, Pennell 5980 (A, B, F, M, R, Y); City Creek Canyon (U, 
Y); Emigration Canyon, Pennell 5985a (F, Y); Mill Creek Canyon (U, Y); Parleys 
Canyon. Pennell 5957 (D, H, K, M, P, R, 8, U, Y); Red Butte (F, M). Utah: 
American Fork Canyon, Jones 1888 (F, M, U). Weber Mountains near Ogden, 
Coulter (Y). 
85. Penstemon leonardi Rydb. 
Penstemon leonardi Rydb. Bull. Torrey Club 40: 483. 1913. ‘Utah: Diehl’s 
Grove, Wahsatch Mountains, Aug. 1, 1884, Leonard (type, in herb. N. Y. Bot. Gard.).”’ 
Type seen. 
Rocky hillsides, frequently among shrubs, at altitudes of 1,900 to 3,000 meters; 
Montane, descending to upper Submontane Zone; flowering from late June to early 
August. Franklin Basin of southeastern Idaho, southward through the Wasatch 
region to Washington County, Utah. . 
Ipano: Oneida: Franklin Basin, C. P. Smith 2278 (Y). 
Urtan: Morgan: Peterson Canyon, Pammel & Blackwood 3866 (M). Salt Lake: Bingham 
Canyon (M); divide between Big Cottonwood Canyon and Heber Valley (U, Y); 
Diehls Grove, Leonard 179 (Y); Emigration Canyon, Pennell 5985 (D, F, H, P, U, 
Y); Parleys Canyon, Pennell 5953 (A, H, K, R, Y), 5961 (M, S, U, Y). Kane: 
Siler (A). Summit (?): Deer Creek, Jones (F, Y). Utah: Aspinwall Peak, 
American Fork Canyon, Jones (M, U). Washington: Pine Valley Peak, Purpus 
6193 (U). 
86. Penstemon sepalulus A. Nels. 
Penstemon azureus ambiguus A. Gray, Syn. Fl. 2!: 272. 1878. “Cafions of the Wah- 
satch Mountains, Utah, viz. of the Provo and American Fork, Watson &c.’’ Prob- 
able isotype, Watson 786, collected July, 1869, in Provo Canyon, seen in herbarium 
of the New York Botanical Garden. 
Penstemon sepalulus A. Nels. in Coulter, New. Man. Rocky Mount. 444. 1909. 
“In the mountains of northwestern Colorado, in adjacent Utah and Wyoming.” 
Based primarily upon P. azureus ambiguus A. Gray. 
Rocky canyon sides, at altitudes of 1,500 to 1,800 (2,300) meters; Upper Sonoran 
and Submontane zones; flowering from mid-June to late July. Western slopes of 
Wasatch Mountains, central Utah. 
Uran: Salt Lake: Garrett 907 (Y). Utah: American Fork Canyon, Jones 1883 (F, 
U, Y); Kyune, Jones 5613e (U); Provo, near mouth of Provo Canyon, Pennell 6110 
(A. D, H, K, M, P, R, 8, U, Y), 6113 (Y); Slide Canyon, Pennell 6120 (F, Y). 
The two following species have been detected in material recently 
examined by the writer. 
25a. Penstemon tidestromii Pennell, sp. nov. 
Stems one or several, 30 to 50 cm. tall, from a caudex, puberulent, glabrate above, 
glaucous; leaves pale dull green, somewhat glaucous, obscurely veined, puberulent, 
those at the base of the stem with oblanceolate obtuse (at times retuse) blades altogether 
10 to 12 cm. long, 1 to 1.5 cm. wide, narrowed into petiole-like bases one-third the 
total length, the stem leaves similar, smaller, slightly clasping from a narrowed base 
(bases of opposite leaves not meeting around stem), becoming reduced and bractlike 
through the inflorescence; thyrsus narrow, secund, from one-third to two-thirds the 
