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. 



XIII. Bridgesiani. 

 One species. 37. P. Bridgesii. 



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

 Alt. 6000-gooo 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 strictifonnis Rydb. On hills and plains of Colo. — Alt. 

 7500-9000 ft— Mesa Verde; hills about Box Caiion, 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 Cafion ; 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 nnilateralis Rydb. (P. secundiAorus 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 Cation ; 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. 



