BORAGINACEAE. 291 



Leaves narrowly linear. n. 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. lincaris. 



Upper surface of the leaves not hairy ; merely pustulate. 



21. M. lanceolate. 

 ALPINAE. 



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

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



Corolla over i cm. long. 23. 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 

 5500 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. (Pulmonaria 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 Canon; 

 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 Canon; 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 Canon. 



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

 ft. Black Canon. 



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 Canon; 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. 



