PENNELL——SCROPHULARIACEAE OF THE ROCKY MOUNTAINS. 371 
cels shorter than the peduncle; sepals 5 mm. long, lanceolate, acuminate, finely 
glandular-pubescent; corolla 10 to 12 mm. long, the tube and throat 7.5 to 9 mm, 
long, the throat 2 to 2.5 mm. wide, somewhat inflated, somewhat flattened and 2- 
grooved anteriorly, the 2 posterior lobes 2.5 to 3 mm. long, all the lobes united near 
base, the free lobes spreading; corolla externally glandular-puberulent, within 
slightly lanose-pubescent over the bases of the anterior lobes, blue (not seen fresh); 
anther sacs widely divaricate, 0.5 mm. long, broadly oval, distinct, opening through- 
out, glabrous, grayish; sterile filament nearly or quite equaling the anterior ones, 
scarcely wider distally, bearded distally with short yellow hairs; capsule not seen. 
Type in the U. S. National Herbarium, no. 260682, collected at Springdale, Wash- 
ington County, Utah, altitude 1,200 m: ters, in flower, May 16, 1894, by Marcus E, 
Jones (no. 5249am; distributed as P. humilis brevifolius S. Wats.). 
Upper Sonoran Zone. 
66. Penstemon humilis Nutt. 
Penstemon humilis Nutt.; A. Gray, Proc. Amer. Acad. 6: 69. 1862. “‘P. humilis 
Nutt., in herb. Acad. Philad. * * * Rocky Mountains, Nuttall (a very depau- 
perate doubtless alpine specimen in herb. Acad. Philad.)’’. Aggregate, but name 
to be applied to Nuttall’s plant. Type, doubtless collected by Nuttall on hills in 
southwestern Wyoming or southeastern Idaho, seen in herbarium of Academy of 
Natural Sciences of Philadelphia. 
Penstemon collinus A. Nels. Bull. Torrey Club 25: 279. 1898. ‘Type specimen 
in Herb, University of Wyoming [A. Nelson] no. 2960, Evanston [Wyoming], May 28, 
1897.’’ Isotype seen in herbarium of the New York Botanical Garden. 
Gravelly sagebrush slopes, at altitudes of 1,500 to 2,400 meters; Submontane Zone 
(descending rarely into Upper Sonoran Zone); flowering from mid-May to early July. 
Foothills, from Jacksons Hole southward through the Teton and northern Wasatch 
regions to Juab County, Utah, southern Idaho, and northeastern Nevada. 
Wyomina: Lincoln: Cokeville, Nelson 4549 (F); Jacksons Hole, Hayden (M); La 
Barge (U). Uinta: Evanston, Nelson 2960 (M, Y), 7197 (B, M, U, Y), Pennell 
5894 (B, D, Y), 5901 (K, P, Y), 5922 (A, S, Y); base of Medicine Butte, Pennell 
5914 (Y); Piedmont (R). 
Ipaxo: Bannock: Oxford; Pocatello, Pennell 6063 (A, F, H, M, R, U, Y); Soda 
Springs (M, Y). Bear Lake: Montpelier, Macbride 15 (M, U, Y), 202 (M, U). 
Uran: Cache: Logan, C. P. Smith 1629 (E, R), 2202 (Y). Juab: Eureka, Jones 
(M,U, Y). Morgan: Devils Slide, Pennell 5941 (F, U, Y), 5951 (Y). San Pete: 
Ephraim Canyon, Tidestrom 1171 (U); Indianola (U); San Pitch Mountains (U). 
Sevier: Fishlake Forest, Eggleston 11127 (U). Summit: Echo, Pennell 5930 (Y), 
5936 (H, M, Y). Uinta: Brush Creek Canyon, Goodding 1289 (F, U, Y). Utah: 
Provo, Pennell 6112 (A, D, F, H, K, M, P, R, U, Y). 
67. Penstemon radicosus A. Nels. 
Penstemon. radicosus A. Nels. Bull. Torrey Club 25: 280. 1898. “Type specimens 
in Herb. University of Wyoming, [A. Nelson] no. 2962, Evanston [Wyoming], May 
28, 1897.’’ Isotype seen in herbarium of the New York Botanical Garden. 
Dry, gravelly slopes, sides of mesas, sagebrush draws, at altitudes of 1,600 to 2,300 
meters; Submontane, descending into Upper Sonoran Zone; flowering from late 
May to early July. Mesas and foothills from Medicine Bow River westward across 
southern Wyoming to the valley of Snake River in southern Idaho, southward enter- 
ing North Park, Colorado, Summit County, Utah, and northern Nevada, northward 
through valley of Henry River and entering southwestern Montana and Yellowstone 
National Park. 
129510°—20——_5 
