310 RHINANTHACEAE, 



of Clear Creek; Crystal Park; Cheyenne Mountain; North Cheyenne Canon; 

 Turkey Creek and tributaries; Wahatoya Canon; near Georgetown; foot- 

 hills west of Ft. Collins ; foot-hills below Colorado Springs ; Dale Creek, 

 Larimer Co.; Dixon Caiion; Rist Cation; gulch west of Pennock's; gulch 

 south of Boreas; Horsetooth Gulch; gulch south of Boulder; Platte Canon; 

 Empire; Eldora to Baltimore; Camp Creek. 



24. Pentstemon Rydbergii A. Nels. (P. erosus Rydb.) In the moun- 

 tains from Wyo. and Wash, to Colo. — Alt. 7000-10,000 ft. — Steamboat 

 Springs ; Rabbit-Ears, Larimer Co. ; South Park ; Sargent's ; Gunnison ; 

 Marshall Pass ; Chicken Creek, West La Plata Mountains ; Pitkin ; Colum- 

 bine; Parlin, Gunnison Co.; Robinson; Sheephorn Divide, Middle Park; 

 Rabbit- Ears Pass; Salida; Walton Creek; Como; Mt. Richtofen on the 

 Michigan; Big South; Eldora to Baltimore. 



25. Pentstemon procerus Dougl. On hills and mountains from Sask. and 

 B. C. to Colo, and Calif.— Alt. 8000-11,000 ft. — Headwaters of Clear Creek; 

 Bard Creek Valley, near Empire; Chambers' Lake; North Park; Mt. Har- 

 vard; Twin Lakes; Como; between Como and Boreas; Walden. 



26. Pentstemon radicosus A. Nels. On plains from Ida. and Mont, to Colo. 

 — Pinkham Creek. 



27. Pentstemon laricifolius H. & A. On dry hills from Wyo.' and Ore. to 

 Colo. — Medicine Bow Mountains, Larimer Co. 



28. Pentstemon ambiguus Torr. On plains from Colo, and Utah to Tex. 

 and Ariz. ; also in Mex. — Rocky Ford ; Sterling. 



29. Pentstemon suffrutescens Rydb. (P. caespitosus suifruticoius A. Gray; 

 P. procumbens Greene) On dry hills and mountains of Colo, and Utah. — 

 Alt. up to 10,000 ft.— Keblar Pass; Ridgway. 



30. Pentstemon caespitosus Nutt. On dry hills from Wyo., Utah and Colo. 

 — McCoy's, Eagle Co. ; north of Craig. 



31. Pentstemon xylus A. Nelson. In the mountains of Colo. — Alt. 6500- 

 10,000 ft. — Cimarron ; South Cottonwood Gulch, Chaffee Co. ; Como ; Man- 

 cos; Gunnison. 



32. Pentstemon teucrioides Greene. On dry hills in Colo. — Alt. about 7250 

 ft. — Sapinero. 



33. Pentstemon linarioides A. Gray. (P. Coloradoensis A. Nels.) On dry 

 hills and plains from Colo, and Utah to N. M. and Ariz. ; also in Mex. — 

 Alt. 6500-7500 ft.- — Dolores; Mancos Canon; Durango. 



34. Pentstemon barbatus Nutt. In the mountains from Colo, to Ariz. ; also 

 in Mex. — " Mountains of Colorado." 



35. Pentstemon Torreyi Benth. (P. barbatus Torreyi A. Gray) On hill- 

 sides in the mountains from Colo, to N. M. and Ariz. ; also in Mex. — Alt. 

 7000-10,000 ft. — Lake City; Artist's Glen; Placer; mesas near Buena Vista; 

 Sangre de Cristo Creek; Salida; North Cheyenne Caiion; Black Canon; 

 Dillon Canon. 



36. Pentstemon trichander (A. Gray) Rydb. (P. barbatus trichander A. 

 Gray) In the mountains of Colo. — Alt. 7000-10,000 ft. — Mesa Verde ; Piedra ; 

 Buena Vista; Durango. 



37. Pentstemon Bridgesii A. Gray. Rocky banks from Colo, to Ariz, and 

 Calif. — Alt. 6000-8000 ft. — El Late {Brandegee). 



