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 Caiion, 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 Caiion 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; Brantly 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 



