184 ROSACEAE. 



Potentilla dissecta glaucophylla (Lehm.) S. Wats. A taller and more glab- 

 rous variety. Boreas ; Beaver Creek Canon ; above Beaver Creek ; Beaver 

 Creek; camp on Little Beaver; Graymont; Cameron Pass; Lake City; Cari- 

 bou ; Red Mountain ; Alpine Tunnel ; Silver Plume ; Camp Creek. 



10. Potentilla juncunda A. Nels. In the mountains of Wyo. and Colo. 

 Alt. up to 10,000 ft. Chambers' Lake ; Beaver Creek ; Cameron Pass ; Little 

 Kate Mine. 



11. Potentilla Nuttallii Lehm. (P. gracilis rigida S. Wats.) In mountain 

 valleys from Sask. and B. C. to Colo, and Calif. Sheephorn Divide, Middle 

 Park ; Grizzly Creek ; northwest of North Park. 



12. Potentilla brunnescens Rydb. In dry mountain meadows from Mont, 

 to Colo. Alt. about 8000 ft. Columbine; Grizzly Creek; Steamboat Springs; 

 Walden. 



13. Potentilla Bakeri Rydb. In the mountains of Colo. Alt. 8000-9000 

 ft. Grizzly Creek; southwest North Park; Doyle's; Gunnison watershed. 



14. Potentilla filipes Rydb. In the mountains of Colo. Alt. 5000-10,000 

 ft. Forks of Poudre and Big South; above Ouray; along Bear River; Como; 

 Chambers' Lake; Dolores. 



15. Potentilla pulcherrima Lehm. In mountain meadows from Sask. and 

 Alb. to N. M. and Nev. Alt. 8000-10,000 ft. Lake City ; mountains above 

 Denver; Larimer Co.; near Empire; Como; Silverton; Beaver Creek; along 

 the Conejos River, north of Antonito; Rico; Stove Prairie Hill, Larimer 

 Co. ; Campion's ranch ; Dolores ; headwaters of Clear Creek. 



1 6. Potentilla subjuga Rydb. Mountains of Colo. Alt. 8000-9000 ft. 

 Near Empire. 



17. Potentilla nivea L. In alpine-arctic situations from Lab. and Alaska 

 to Colo.; also in Europe and Asia. Alt 10,000-13,000 ft. Devil's Causeway; 

 Empire; Ouray; West Spanish Peak; Cumberland Mine, La Plata Mountain; 

 mountains of Estes Park. 



18. Potentilla unifiora Ledeb. In alpine-arctic situations from Greenl. and 

 Alaska to Colo, and Ore. Alt. 10,000-13,000 ft. High mountains about Em- 

 pire; Hinsdale Co.; Cameron Pass; Estes Park; Boreas. 



19. Potentilla atrovirens Rydb. On plains and hills from Minn, and Wyo. 

 to Colo. Williams' Canon, Pike's Peak. 



20. Potentilla pennsylvanica strigosa Pursh. On plains from Hudson Bay 

 and Alb. to Kans. and N. M. (the true P. Pensylvanica L. is not found in 

 Colo.). Alt. up to 8000 ft. Antonito; West Mancos Canon; Central City; 

 Empire. 



Potentilla pennsylvanica arachnoidea Lehm. On high plains from Mont, 

 and Utah to N. M. and Ariz. Alt. 5000-8000 ft. Lake City; Sangre de 

 Cristo Creek; Chicken Creek; Ouray; near Boulder; mountains of Estes 

 Park. 



21. Potentilla bipinnatifida Dougl. On plains from Sask. and Alb. to Neb. 

 and Colo. Alt. 4000-10,000 ft. Larimer Co. ; Como ; Antonito ; Higho ; Ute 

 Pass ; Indian Creek Pass ; Gunnison. 



22. Potentilla platyloba Rydb. (P. bipinnatifida platyloba Rydb.) On 

 plains from Hudson Bay and Alb. to Neb. and Colo. Mountain View ; Gun- 

 nison ; Pitkin ; Empire. 



