BORAGINACEAE. 291 



Leaves narrowly linear. ' ii. M. lateriflora. 



Leaves oblong or oblanceolate. 19. M. amoena. 



Pedicels glabrous or pustulate ; calyx glabrous except the ciliate-margined calyx- 

 lobes. 



Upper surface of the leaves short-pubescent. 20. M. linearis. 

 Upper surface of the leaves not hairy ; merely pustulate. 



21. M. lanceolata. 

 Alpinae. 



Calyx ciliate on the margins ; leaves ovate, lanceolate or oblanceolate. 



Corolla 5-7 mm. long. 22. M. alpina. 



Corolla over i cm. long. 22. M. perplexa. 

 Calyx villous-ciliate all over ; corolla 7-8 mm. long. 



Leaves oblong or oblanceolate, glabrous beneath. 24. M. brevistyla. 



Leaves linear, densely hairy on both sides. 25. M. canescens. 



1. Mertensia brachyloba Greene. On foot-hills of Colorado. — Alt. about 

 SSOO ft.— West of Ft. Collins ; Mt. Harvard. 



2. Mertensia picta Rydb. In the mountains of Colo. — Alt. about 12,000 ft. — 

 Mt. Baldy; Estes Park. 



3. Mertensia ciliata (Torn) Don. (Ptiimonaria ciliata Torr.) Along 

 streams from Wyo. and Ida. to Colo, and Nev. — Alt. 6000-13,000 ft. — Head- 

 waters of Clear Creek; Pike's Peak; South Park; North Cheyenne Cafion; 

 Colorado Springs; Cascade; Green Mountain Falls; Peak Valley; George- 

 town; Gray's Peak; Boreas; Cameron Pass; Michigan Hill; Beaver Creek; 

 Campton's Ranch ; Poudre River ; summit of North Park Range, Larimer Co. 



4. Mertensia punctata Greene. Along streams in the mountains of Colo. — 

 Alt. 9000-10,000 ft.— Near Pagosa Peak; Chambers' Lake. 



5. Mertensia polyphylla Greene. Along streams in the mountains of Wyo. 

 and Colo. — Alt. 8000-12,000 ft. — Near Pagosa Peak; mountains,. Larimer 

 Co. ; Pike's Peak ; near Ironton, San Juan Co. ; headwaters of Pass Creek ; 

 Eldora to Baltimore; Hotchkiss ; Cameron Pass; Marshall Pass; Van Boxle's 

 ranch above Cimarron ; Dark Cation ; Black Canon ; Ward, Boulder Co. ; 

 West Indian Creek. 



6. Mertensia platensis Rydb. (Mertensia polyphylla platensis Rydb.) 

 Along streams in mountains of Colo. — Alt. about 10,000 ft. — Bob Creek, 

 West La Plata Mountains. 



7. Mertensia cynoglossoides Greene. Along streams in Colo. — Alt. about 

 7000 ft. — Black Cafion. 



8. Mertensia muriculata Greene. Along streams in Colo.— Alt. about 7000 

 ft. — Black Caiion. 



9. Mertensia alba Rydb. Along mountain streams in Colo. — Alt. about 

 10,500 ft. — La Plata River. 



10. Mertensia pratensis Heller. In wet meadows and along streams from 

 Colo, to N. M. and Ariz. — Alt. 7000-12,000 ft. — Cucharas River, above La 

 Veta; Dolores; Mt. Hesperus; Bob Creek, West La Plata Mountains; Man- 

 cos; mountains above Ouray. 



11. Mertensia lateriflora Greene. On hillsides in Colo. — Alt. 5000-11,500 

 ft. — Near Empire; Ojo; Veta Mountain; Palsgrove Cafion; headwaters of 

 Sangre de Cristo Creek ; Carson ; Estes Peak, Larimer Co. ; South Park ; 

 Eldora to Baltimore; Estes Park; Cascade; Ruxton. 



12. Mertensia Bakeri Greene. On the higher mountains of Colo. — Alt. 

 11,000-13,000 ft. — Horse-shoe Mountain; Marshall Pass; Hayden Peak; 

 Carson; mountains above Como ; Iron Mountain; Spicer. 



