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 Canon; Rist Canon; 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 suffruticosus 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. Color ado ensis 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 Canon; 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). 



