308 RHINANTHACEAE. 



XII. BARBATI. 



Lower lip bearded within. 34. P. barbatus. 



Lower lip glabrous within. 



Anthers glabrous ; leaves usually glabrous. 35. P. Torreyi. 



Anthers long-bearded ; leaves puberulent. 36. P. trichander. 



i 



XIII. BRIDGESIANI. 



One species. 37. P. Bridgesii. 



1. Pentstemon strictus Benth. On hills from Wyo. to Colo, and Utah. 

 Alt. 6000-9000 ft. Cimarron; Chicken Creek, West La Plata Mountains; Elk 

 River, Routt Co. ; Cerro Summit ; La Plata River ; Pearl ; Hotchkiss ; between 

 Porter and Durango; North Park; Walton; Steamboat Springs; Walden. 



2. Pentstemon strictiformis Rydb. On hills and plains of Colo. Alt. 

 7500-9000 ft. Mesa Verde; hills about Box Canon, west of Ouray; Arboles; 

 Grayback mining camps and Placer Gulch; Mancos; Sangre de Christo 

 Creek; Antonito; Redcliffe. 



3. Pentstemon comarrhenus A. Gray. On dry hills in Colo, and Utah. 

 Alt. 5000-7000 ft. Mancos; Cedar Edge; Piedra. 



4. Pentstemon Fremontii T. & G. On dry hills from Wyo. to Colo, and 

 Utah. Meeker, Rio Blanco County. 



5. Pentstemon utahensis (S. Wats.) A. Nels. (P. glaber Utahensis S. 

 Wats.) In the mountains from Wyo. and Ida. to Colo, and Utah. Alt. up 

 to 10,000 ft. Hahn's Peak; Marshall Pass; Hotchkiss; Horsetooth Gulch; 

 Leroux Creek; Anita Peak. 



6. Pentstemon oreophilus Rydb. In the mountains of Colo. Alt. 8000- 

 10,000 ft. Mountain sides near Empire; Bald Mountain; Halfway House; 

 Larimer Co. ; Manitou ; South Cheyenne Canon ; Eldora to Baltimore ; Bos- 

 worth's ranch ; Horsetooth Mountain ; Stove Prairie. 



7. Pentstemon alpinus Torn (P. glaber alpinus A. Gray; P. riparius A. 

 Nels.) In the mountains of Colo, and Wyo., especially along streams. Alt. 

 6000-10,000 ft. Flagstaff Hill; mountain sides near Empire; Bosworth's 

 ranch; Stove Prairie; Horsetooth Mountain; Ward; Empire. 



8. Pentstemon Brandegei Porter. In the mountains from Mont, to Colo. 

 Alt. 6000-9000 ft. Dry rocks, Cheyenne Mountain; Colorado Springs; 

 Pueblo; Pike's Peak. 



9. Pentstemon unilateralis Rydb. (P. secundiftorus A. Gray; not Benth.) 

 In the mountains from Wyo. to N. M. Alt. 5500-10,000 ft. Near Empire; 

 Georgetown ; Douglass Co. ; Sangre de Cristo Creek ; Gunnison ; Central 

 City; Manitou; Ft. Collins; Golden; Idaho Springs; Como, South Park; 

 Mt. Harvard; Colorado Springs; Leroux Creek; gulch west of Pennock's; 

 Hayden's ranch; Clear Creek; Spring Canon; Poudre River; La Porte; 

 Empire; Eldora to Baltimore; Boulder. 



10. Pentstemon grandiflorus Nutt. On prairies and plains from Ills., Wise, 

 and Ore. to Ind. Terr, and Utah. Gray's Peak. 



11. Pentstemon Hallii A. Gray. On the higher mountains of Colo. Alt. 

 10,000-14,000 ft. Pike's Peak; Seven Lakes; Dead Lake; Mount Garfield; 

 mountains above Como; Argentine Pass; Gray's Peak; above Boreas. 



12. Pentstemon cyathophorus Rydb. In the mountains of Colo. Alt. 

 about 8500 ft. Pearl; Grizzly Creek; North Park. 



