RHINANTHACEAE. 
309 
13. Pentstemon Watsonii A. Gray. In the mountains from Colo, to Nev. 
and Ariz.—Glenwood Springs. 
14. Pentstemon secundiflorus Benth. (P. acuminatus A. Gray, mainly; not 
Dougl.) On dry plains and hills from Wyo. to N. Mex.—Alt. 5000-9000 ft. 
—Near Empire; Manitou; Colorado Springs; Ft. Collins; foothills, Larimer 
Co.; Denver; South Park; Crystal Park; North Park, near Teller; north 
of La Porte; Horsetooth Gulch; Wray; Platte Canon; Dixon Canon; Trail 
Creek; Camp Creek. 
15. Pentstemon Fendleri A. Gray. On high plains of Colo, and to N. M. 
and Calif.—Arboles ; Salida. 
16. Pentstemon angustifolius Pursh. (P. coeruleus Nutt.) On plains 
from S. D. and Mont, to Colo.—Alt. 4000-6000 ft.—Ft. Collins; New Wind¬ 
sor; Redcliffe; Colorado Springs. 
Pentstemon angustifolius caudatus (Heller) Rydb. ( P. caudatus Heller) 
A taller variety with broader leaves from Colo, and N. Mex.—Livermore; 
Cucharas River, below La Veta; Ojo; butte, 5 miles southwest of La Veta; 
Walsenburg; river-bluffs north of La Veta; mesas near Pueblo; Colorado 
College. 
17. Pentstemon glaucus Graham. In the mountains from Wyo. and Utah 
to Colo, and Ariz.—Alt. 8000-12,000 ft.—Headwaters of Clear Creek; Half¬ 
moon Creek; Dark Canon, Pike’s Peak; Chambers’ Lake; mountains south 
of Ward, Boulder Co.; Berthoud Pass, near Georgetown; Pike’s Peak; Sil¬ 
ver Plume; Cameron Pass; near Graymont; near Pagosa Peak; Salida; 
Gore Pass; Anita Peak; Hahn’s Peak; Red Mountain road, south of Ouray; 
near La Plata; Palsgrove Canon; Marshall Pass; Argentine Pass; near 
Seven Lakes, Pike’s Peak; Villa Grove; Silverton; Robinson; Alpine Tun¬ 
nel ; Gray’s Peak; Little Kate Mine, La Plata Mountains; Steamboat Springs. 
Pentstemon glaucus stenosepalus A. Gray. A variety with long-attenuate 
calyx-lobes.—Graymont; Ragged Mountain; Michigan Hill; Boreas ; Beaver 
Creek; Gore Pass; Four-mile Hill, Routt Co.; Seven Lakes, Pike’s Peak; 
Eldora to Baltimore; Chambers’ Lake; Spicer. 
18. Pentstemon Moffattii Eastw. On dry table-lands of western Colo.— 
Mancos. 
19. Pentstemon Jamesii Torr. On plains and dry valleys in Colo, and S. D. 
—Alt. 5000-9000 ft.—Cucharas Valley, near La Veta; Swallows, between 
Pueblo and Canon City; mesas near Pueblo; near Badito; Sangre de Cristo 
Creek; Walsenburg; Rocky Ford. 
20. Pentstemon albidus Nutt. On prairies and plains from Ass. and Ida. 
to Kans. and Colo.—Near Denver; Eads; Sterling; Grand Junction. 
21. Pentstemon Harbourii A. Gray. On the higher peaks of Colo.—Alt. 
9000-13,000 ft.—Rock-slide at the foot of Mt. McClellan; Kelso Valley; Little 
Kate Basin, La Plata Mountains; West Spanish Peak; mountains above 
Ouray; Mt. Richtofen. 
22. Pentstemon gracilis Nutt. On plains and prairies from Man. and Sask. 
to Tex. and Colo.—Alt. 4000-8000 ft.—Divide west of salt-works, South 
Park; north of Cheyenne Canon; Wahatoya Creek; Brandy Canon; Table 
Rock; Dillon Canon, Trinidad; Palmer Lake. 
23. Pentstemon humilis Nutt. On plains and hills from Mont, and Alb. to 
Colo, and Nev.—Alt. 5000-10,000 ft.—South Park; near Denver; headwaters 
