SALICACEAE. 95 



16. Salix irrorata Anders. In canons and along streams from Colo, to N. 

 M. Alt. 6000-9000 ft. Dry rocks, Cheyenne Mountain; Manitou; Cucharas 

 Valley, near La Veta; South Cheyenne Canon; foot-hills, Larimer Co.; Los 

 Pinos; Ironton Park, nine miles south of Ouray; Gunnison; Crested Butte, 

 Gunnison watershed ; Grizzly Creek ; Sheep Creek, above Campton's ; Horse- 

 tooth Gulch ; Rist Canon ; Howe's Gulch. 



17. Salix Geyeriana Anders. In mountain valleys along streams from 

 Wyo. to Wash., Colo, and Ore. Alt. 8000-10,000 ft. Mountains of Estes 

 Park; Minturn; Columbine; Sargent's; Pinkham Creek, Larimer Co. 



1 8. Salix macrocarpa Nutt. Along streams in the mountains from Wyo. to 

 Wash, and Colo. Alt. up to 10,000 ft. Seven Lakes; Stove Prairie, Lari- 

 mer Co. 



19. Salix perrostrata Rydb. In valleys and in wet places in the foot-hills 

 from Hudson Bay to Alaska and Colo. Alt. 1500-2700 ft. Foot-hills, Colo- 

 rado Springs; foot-hills west of Fort Collins; Los Pinos; South Cheyenne 

 Canon; Ruxton; Green Mountain Falls; Ojo; Cimarron; Chicken Creek, 

 West La Plata Mountains ; Pike's Peak Trail ; Rist Canon ; mountains north- 

 east of Dolores ; Boulder. 



20. Salix Bebbiana Sarg. (S. rostrata Richardson) In valleys and on 

 hillsides from Anticosti to Alaska, N. J. and Calif. Alt. 5000-10,000 ft 

 Manitou ; Ruxton Dell ; Pike's Peak ; North Park, Larimer Co. ; mountains 

 of Estes Park, Larimer Co.; Horsetooth Gulch; Boulder; Beaver Creek. 



21. Salix Nuttallii Sarg. (S. flavescens Nutt.) Along streams and in wet 

 valleys from Ass. and B. C. to N. M. and Calif. Alt. 7000-11,000 ft Hills 

 about Box Canon, west of Ouray; Wahatoya Canon; Little Kate Basin, La 

 Plata Mountains; mountains, Larimer Co.; Artists' Glen; North Cheyenne 

 Canon; chaparral-covered hills southeast of Ouray; Stove Prairie, Larimer 

 Co.; Mount Baldy; Barnes' Camp on Little South; Redstone; Eldora to 

 Baltimore ; Empire. 



22. Salix pachnophora Rydb. In the mountains along streams, Colo, and 

 N. M. Alt. 7000-8000 ft. Rico, Dolores Co.; along Uncompahgre River; 

 near Ouray ; Chambers' Lake ; Halm's Peak, Routt Co. ; Rabbit-Ears. 



23. Salix brachycarpa Nutt. (Salix desertorum stricta Anderson; S. stricta 

 Rydb.) In springy places in the mountains from Que. to Alb. and Colo. 

 Alt. 7000-11,000 ft Twin Lakes; Pike's Peak; Sheep Creek, above Camp- 

 ton's ; near Higho ; Veta Pass, Sangre de Cristo Range ; Walden, Larimer 

 Co. 



24. Salix pseudolapponum Seem. On mountain tops of Colorado. Alt. 

 9000-13,000 ft. Gray's Peak; Georgetown; Cimarron Pass; Alpine Tunnel; 

 Mt. Abram, Ouray; Sierra Blanca; Little Kate Basin, La Plata Mountains; 

 Mt. Hesperus, above timber line; West Spanish Peak; headwaters of Sangre 

 de Cristo Creek; Twin Lakes; Bottomless Pit; east slope Pike's Peak; Dead 

 Lake ; Tennessee Pass ; bank of Michigan, North Park ; mountains above 

 Graymont; Eldora to Baltimore; Berthoud Pass. 



25. Salix glaucops Anders. In alpine bogs and springy places from Alb. to 

 Yukon Terr., Colo, and Calif. Alt. 7000-13,000 ft. In var. glabrata Anders., 

 the leaves are nearly glabrous above. Mountains between Sunshine and 

 Ward ; Brush Creek, Custer Co. ; mountains south of Ward, Boulder Co. ; 

 Bear Creek Divide, West La Plata Mountains ; Alpine Tunnel ; Mt. Abram, 



