370 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
upper valley of North Platte River, in Carbon County, Wyoming, and Jackson County, 
Colorado, perhaps crossing from the north into Middle Park. 
Wyromine: Albany: Cooper Hill (A, B, M, P, U, Y¥); Laramie, Pennell 5873 (D, F, 
M, Y); head of Pole Creek (A, M, U, Y); Sand Creek (B, M, U, Y); Sherman 
(M, U). Carbon: Encampment, Tweedy 4305 (U, Y). Laramie: Horse Creek, 
Buffum (F); west of Islay (U). 
Cotoravo: Boulder: Boulder, Pennell 5826 (A, M, U, Y); Eldora Lake (B); Lyons 
(M); Miramonte (B); Nederland (B); St. Vrains Creek (B); Sugarloaf Mountain 
(B); Ward (B, M, Y). Clear Creek: Empire (A, M, U, Y); near Georgetown, 
Patterson 117 (F, M, U, Y); Graymont (U); Grays Peak (F, M, Y); Leavenworth 
Mountain (F). Douglas: Mrs. S. B. Walker (F). El Paso: Cheyenne Mountain 
(Y); Crystal Park (M, U, Y); Eastinville (U); Lake Moraine (F); Manitou, Pen- 
nell 5784 (B, Y); North Cheyenne Canyon, Pennell 5774 (Y), 6339 (D, H, U, Y); 
Palmer Lake, Pennell 5807 (H, U, Y); Pikes Peak (above Halfway House), 
Pennell 6319 (R, Y); South Cheyenne Canyon, Pennell 5792 (F, M, R, Y). Fre- 
mont: Canon City, Brandegee (M). Gilpin: Antelope (B); Eldora to Baltimore 
(Y); Tolland, Pennell 6355 (F, P, Y). Grand (?): ‘Middle Park,’’ Henry (M; 
with specimens of P. watsoni). Huerfano: Turkey Creek and tributaries (Y); 
Wahatoya Canyon, Rydberg & Vreeland 5638 (Y). Jackson: Camp Creek, 
Goodding 1458 (A, B, M, P, U, Y). Jefferson: Golden, Pennell 5816 (M, Y), 
6387 (Y); Morrison, Pennell 5821 (D, H, R, U, Y); Platte Canyon (U). Larimer: 
Dale Creek (Y); Dixon Canyon (F, U); Estes Park (M, R, U); Horsetooth Moun- 
tain, Pennell 5853 (F, K, P, R, Y), 5854 (S, Y), 5861 (D, Y); Howes Gulch (Y); 
North Box Elder (B); Owl Canyon, Pennell 5871 (¥); Pinewood; Rist Canyon 
(M); Ten-mile Creek (B). Las Animas: Brantly Canyon, Osterhout (Y). Park: 
South Park, Wolf 297 (U, Y). Pueblo: Near Beulah, Robbins 4489 (B). 
64. Penstemon brevifolius (A. Gray) A. Nels. 
Penstemon humilis brevifolius A. Gray, Syn. Fl. 2!: 267. 1878. ‘‘P. humilis, var. ? 
Watson 1. c. [in King, Geol. Expl. 40th Par. 5: 220. 1871]. * * * Utah, in the Wah- 
satch Mountains, at 9,000 or 10,000 feet, Watson, Eaton.’? According to Watson (loc. 
cit.), “In the Wahsatch Mountains; 9-10,000 feet altitude; July, August (781).”’ Iso- 
type, Watson 781, collected in Cottonwood Canyon, Utah, altitude 2,700 meters, July, 
1869, seen in herbarium of Columbia University at the New York Botanical Garden. 
enstemon brevifolius A. Nels, in Coulter, New Man. Rocky Mount. 445. 1909. 
Rocky cliffs and summits, at altitudes of 2,400 to 3,200 meters; Montane and Sub- 
alpine zones; flowering from mid-June to late July. Northern Wasatch Mountains, 
Utah, and East Humboldt Mountains, Nevada. 
Uran: Salt Lake: Alta (F, Y); near Clayton Peak (M): Emigration Canyon, P ennell 
5986 (H, M, R, U, Y); Lake Blanche, Pennell 5975 (D, H, M, P, R, U, Y); near 
Silver Lake, Pennell 6086 (F, K, 8, Y), 6092 (A, Y). Toole: Ophir City, B.S. 
Blackwell (P). Utah: American Fork Canyon, Jones 1405 (F, U). 
65. Penstemon obtusifolius Pennell, sp. nov. 
Stems several, more or less decumbent at base, erect, 15 to 20 cm, tall, from much- 
branched rootstocks, slender, below puberulent with reflexed hairs, above glandular- 
pubescent, light greer; leaves thin, pale green, dull, obscurely veined, glabrous, 
those at the base of the stem much tufted, the blades broadly oval, obtuse or nearly 
80, entire, 2 to 3 cm. long, 1.5 to 2.2 cm. wide, abruptly narrowed to a slightly mar- 
gined petiole about equaling the length of blade, the stem leaves oblong-lanceolates 
acutish, clasping, entire or serrulate, the largest 2.3 cm. long, 0.5 to 0.7 cm. wide; 
thyrsus narrow, not secund, one-third to one-half the height of the plant composed 
of about 4 loose fascicles, each consisting of 2 axillary ascending branches, their pedi- 
