374 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
72. Penstemon thompsoniae (A. Gray) Rydb. 
Penstemon pumilus thompsoniae A. Gray, Syn. Fl. 2}: 269. 1878. ‘‘S. Utah, Mrs. 
Thompson.”’ Type, from Kanab, Utah, collected in 1872, seen in Gray Herbarium. 
Penstemon thompsoniae Rydb. Bull. Torrey Club 36: 690. 1909. 
Southern Utah and northern Arizona. 
Uran: Kane: Kanab, Mrs. Thompson (H). Without data, Bishop 250 in 1872 (U). 
73. Penstemon crandallii A. Nels. 
Penstemon crandallu A. Nels. Bull. Torrey Club 26: 354. 1899. ‘“‘I am indebted 
to Prof. C. S. Crandall for specimens of this plant, collected by him near Como, 
Park County, Colorado, July 23, 1897.’’ Type seen in Rocky Mountain Herbarium. 
‘Gravelly places,’’ at altitudes of 2,800 to 3,000 meters; Montane Zone; flowering 
from early July to early August. Park and Chaffee counties, central Colorado. 
Cotorapo: Chaffee: South Cottonwood Gulch, Sheldon 547 (U, Y, Z). Park: Como, 
Cowen (F, M, U, Y), Crandall 4197 (Y), Shear 4582 (Y), 4583 (Y). 
74. Penstemon suffrutescens Rydb. 
?Penstemon caespitosus suffruticosus A. Gray, Syn. Fl.2!: 270, 1878. ‘‘Utah, near 
Beaver, Palmer.” Type, in fruiting stage, seen in Gray Herbarium. Pedicels and 
calyx more glandular than in P. suffrutescens. Probably distinct. 
Penstemon suffrutescens Rydb. Bull. Torrey Club 38: 503. (Sept. 30) 1901. ‘‘Colo- 
rado: Ridgway, 1895, F. Tweedy 170.” Type, collected June 20, seen in herbarium 
of the New York Botanical Garden. 
Penstemon procumbens Greene, Pl. Baker. 8: 23. (Nov. 18) 1901. ‘‘Forming large 
mats on open slopes at Keblar Pass [Colorado], 7 Aug., 1901, [C. F. Baker] n. 733.” 
Isotype seen in U. 8. National Herbarium. With smaller, broader leaves, and more 
procumbent habit than specimens seen of P. suffrutescens; needs further field study. 
‘‘Woods,”’ at altitudes of 2,200 to 3,000 meters; Submontane and Montane zones; 
flowering from late June to early August. Gunnison and Delta to Ouray counties, 
west-central Colorado, and probably to central Utah. 
CoLorapDo: Gunnison: Keblar Pass, Baker 733 (M, U, Y); Elk Mountains, Brandegee 
(M). Ouray: Ridgway, Tweedy 170 (U, Y). 
Uran: Piute: Mountains north of Bullion Creek, near Marysvale, Rydberg & Carlion 
7106 (Y). 
75. Penstemon xylus A. Nels. 
Penstemon zylus A. Nels. Bot. Gaz. 34: 31. 1902.’ “The specimens before me were 
collected by Mr. H. N. Wheeler at Sapinero,Colorado, 1898, no. 446.” Type seen in 
Rocky Mountain Herbarium. Apparently but one specimen collected by me while 
at Sapinero, and this among dense growths of P. teucrioides. Perhaps the “species,”’ 
at least at times, represents an intermediate (hybrid ?) between P. teucrioides and P. 
suffrutescens. Needs further field study. 
Sagebrush hills, at altitudes of 1,700 to 2,800 meters; Upper Sonoran and Sub- 
montane zones; flowering from late May to mid-July. Scattered through western 
Colorado and southeastern Utah. 
Cotorapo: Delta: Paonia, Osterhout 4523 (Y); Mesa Grande (F). Eagle: Wolcott, 
Osterhout 2112. Fremont: Brandegee (M). Gunnison: Sapinero, Pennell 6269 
(Y), H. N. Wheeler 446 (B). Hinsdale: Lake City, Purpus 721 (F). Mineral: 
Wagonwheel Gap, B. H. Smith (A). Montrose: Cimarron, Baker 333 (F, M, R, 
U, Y); Naturita, Payson 361(R). Ouray: Ridgway, Tweedy 171 (U). 
Uran: La Sal Mountains, Purpus 5693 (M). 
