POLYGONACEAE. 105 



Springs; Durango; Middle Park; La Veta; Grand Junction; Morrison; Gun- 

 nison; Salida; Sangre de Cristo Creek; Red Rock Canon, near Pike's Peak; 

 Rosita; Buena Vista. 



4. Eriogonum Bakeri Greene. (E. ftavum vegetius T. & G. ; E. Jamesii 

 ftavescens S. Wats. ; E. vegetius (T. & G.) Nels.) On plains and hills from 

 Wyo. and Utah to N. M. and Ariz. Alt. 9000-10,000 ft. Meadow Park; 

 mountains between Sunshine and Ward; Bald Mountain, west of Loveland; 

 Black Canon; Horsetooth Gulch, Fort Collins; Poudre Canon; Moon's ranch. 



5. Eriogonum arcuatum Greene. Mountains in Colo. Alt. about 7000 ft.; 

 known only from the type locality. Pagosa Springs. 



6. Eriogonum flavum Nutt. (E. crassifolium Dougl.) On dry hills and 

 mountains and in canons from Sask. and Alb. to Neb. and Colo. Alt. 4000- 

 12,000 ft. Headwaters of Clear Creek and alpine ridges east of Middle Park; 

 plains and foot-hills near Boulder; Sand Creek Pass; Twin Lakes; Medicine 

 Bow Mountains; Minnehaha; Ruxton; Georgetown; Fossil Creek; Artists' 

 Glen and Cheyenne Canon, near Pike's Peak. 



7. Eriogonum aureum Nutt. (E. chloranthum Greene.) Mountains of 

 Colo. Alt. 11,000-13,000 ft. Mount Ouray; Marshall Pass. 



8. Eriogonum xanthum Small. On exposed mountain tops in Colorado. 

 Alt. 12,000-14,000 ft. Gray's Peak; spur of Mt. Harvard. 



9. Eriogonum umbellatum Torr. On mountains and dry valleys in Wyo., 

 Ida., Colo, and Utah. Alt. 6000-12,000 ft. Headwaters of Clear Creek and 

 alpine ridges east of Middle Park; North Park; Arkansas Junction, near 

 Leadville; plains and foot-hills near Boulder; mountains between Sunshine 

 and Ward ; Gunnison ; Fort Collins ; Clear Creek Canon ; near Denver ; Man- 

 cos; South Table Mountain, Golden; canons and meadows, Ouray; Kelso 

 Mountain; Horsetooth Gulch; Colorado and Wyoming State line; near Nar- 

 rows; hills west of Soldier Canon; camp on Grizzly Creek, foot of Rabbit- 

 Ear Range; Empire. 



10. Eriogonum umbelliferum Small. Mountains from Wyo. and Nev. to 

 Colo, and Utah. Alt. 7000-11,000 ft. Veta Pass; Grayback mining camps; 

 vicinity of Ouray ; Redcliffe, Eagle Co. ; Van Boxle's ranch, above Cimarron ; 

 Black Canon ; headwaters of Sangre de Cristo Creek ; Glenwood Springs ; 

 Leroux Creek, Delta Co.; Lake Creek; Middle Park; Spicer, Larimer Co. 



it. Eriogonum croceum Small. Mountains from Ida. and Wash, to Colo. 

 Alt. up to 9000 ft. Hesperus ; Telluride ; Piedra. 



12. Eriogonum subalpinum Greene. In dry mountain valleys from Alb. and 

 B. C. to Colo, and Nev. Alt. 5000-10,000 ft. Headwaters of Arkansas River; 

 Larimer Co.; near Pinkhampton, North Park; Arkansas Junction, near Lead- 

 ville ; edge of Wyoming, North Park ; Crested Butte ; Dillon ; Idaho Springs ; 

 South Park; Middle Park; foot of Mt. Richtofen, on the Michigan; north 

 bank of Poudre River ; forks of Poudre and Big South ; Rustic ; Empire ; 

 Pinkham Creek. 



13. Eriogonum latum Small. In dry valleys and on plains from Mont, and 

 Wash, to Colo, and Utah. Alt. about 5000 ft. Denver. 



14. Eriogonum lachnogymum Torr. Dry plains and canons from Kans. and 

 Colo, to Tex. and N. M. Alt. about 5000 ft. Brantly Canon, Las Animas 

 Co. 



