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. (E. Havum vegetius T. & G. ; E. Jamesii 

 flavescens 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 Caiion; 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 Cafion, near Pike's Peak. 



7. Eriogonum aureum Nutt. (£. 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; caiions and meadows, Ouray; Kelso 

 Mountain ; Horsetooth Gulch ; Colorado and Wyoming State line ; 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 Canon ; 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 canons from Kans. and 

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

 Co. 



