POLYGONACEAE. 105 



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

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

 Rosita; Buena Vista. 



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

 Aavescens 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 Caiion ; 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. (B. 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. 1 2,000-1 4,ooo_ 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 Caiion; near Denver; Man- 

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

 Mountain; .Horsetooth Gulch; Colorado and Wyoming State hne; near Nar- 

 rows; hills west of Soldier Caiion; 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 Caiion ; headwaters of Sangre de Cristo Creek ; Glenwood Springs ; 

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



11. 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 caiions from Kans. and 

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

 Co. 



