PENNELL—SCROPHULARIACEAE OF THE ROCKY MOUNTAINS. 375 
76. Penstemon caespitosus Nutt. 
Penstemon caespitosus Nutt.; A. Gray, Proc. Amer. Acad. 6: 66. 1862. “Rocky 
Mountains, Nuttall (a diminutive specimen in herb. Acad. Philad.).”” Type, labeled 
“R. Mts., N. Calif.,’? seen in herbarium of the Academy of Natural Sciences of 
Philadelphia. 
Dry, gravelly, sagebrush slopes, at altitudes of 1,800 to 2,100 meters; Submontane 
Zone; flowering from late May to early July. Foothills and lower mountain slopes, 
Wasatch Mountains, southwestern Wyoming, Uinta Mountains of northern Utah, and 
in northern Colorado. 
Wyomina: Carbon: Saratoga, Buffum 713 (F, R). Uinta: Carter (R); Fort Bridger; 
Evanston, Pennell 5895 (F, H, M, U, Y); Leroy (R). 
Cotorapo: Eagle: McCoys, Osterhout 2762 (Y). Grand: Mount Bross, Patterson 
(F, M, Y); Sulphur Springs (Y); Willow Creek (M). Moffat: North of Craig, 
Osterhout 2623 (Y). Routt: Egeria Park, Eastwood (Y). 
Uran: Uinta: Dyer Mine, Goodding 1237 (F, R, U, Y). 
76a. Penstemon caespitosus perbrevis Pennell, subsp. nov. 
Leaves shorter, 0.5 to 1 (sometimes 1.2) cm. long, much more abruptly widening 
upward, spatulate-obovate, nearly all with petiole-like bases; sepals less attenuate, 
acuminate; plants closely prostrate, the ultimate ascending branches very short. 
Otherwise as in the species. 
Type in the herbarium of the New York Botanical Garden, collected on dry sage- 
brush summit of mesa, at Castle Gate, Carbon County, Utah, altitude about 2,200 to 
2,400 meters, in shriveled blossom, July 18, 1915, by F. W. Pennell (no. 6138). 
Sagebrush-covered mesas, at altitudes of (1,600) 2,100 to 2,400 meters; Upper 
Sonoran and Submontane zones; flowering from early June to early July. Wasatch 
region of central Utah. 
Uran: Carbon: Castle Gate, Pennell 6138 (R, U, Y). Garfield: Tropic, Jones 5312ai 
(U). Utah: Soldier Summit, Jones 5599 (M, U, Y); near Thistle (U, Y). 
77. Penstemon teucrioides Greene. 
Penstemon teucrioides Greene, Pl. Baker. 3: 23. 1910. ‘Collected at Sapinero 
[Colorado], 19 June [1901]; said to be commom there on dry ground, [C. F. Baker] 
n. 186.’ Isotype seen in U. S. National Herbarium. 
Dry, stony, sagebrush slopes, at altitudes of 2,100 to 2,800 meters. Submontane 
Zone; flowering from late June to early August. Common to abundant in Gunnison 
Valley, west-central Colorado. 
Cotorapo: Gunnison: Gunnison, Pennell 6283 (Y); Sapinero, Baker 186 (M, R, U, 
Y), Pennell 6263 (B, F, Y), 6268 (D, H, K, M, P, R, U, Y), 6276 (A, S, Y), H. N. 
Wheeler 399 (B, R). Hinsdale: Lake City, Purpus 721, in part (F). Saguache: 
Sargents, Pennell 6302 (D, F, H, M, R, U, Y). 
78. Penstemon glabrescens Pennell, sp. nov. 
Stems tufted, much branched, prostrate and ascending, spreading, 7 to 15 cm. tall, 
from a woody caudex, with long woody prostrate stems, puberulent with reflexed 
cinereous hairs; leaves somewhat thickened, light green above and beneath, not 
veined, sparsely puberulent above proximally or usually glabrate, entire, all cauline, 
the blades sessile, linear, acute, the largest mostly 1 to 1.5 cm. long, 0.7 to 1 mm. wide; 
thyrsus narrow (flowers seemingly axillary), composed of 4 to 8 fascicles, each con- 
sisting of 2 axillary branches, each bearing 1 or 2 flowers; sepals 5 to 8 mm. long, 
lance-ovate to ovate, acuminate to caudate, not ribbed, proximally with margins 
more or less scarious and erose, slightly glandular-puberulent; corolla 16 to 18 mm. 
