FABACEAE. 205 



1. Tium Drummondii (Dougl.) Rydb. (Astragalus Drummondii Dougl.) 

 On hills, plains and valleys from Sask. and Alb. to Neb. and Colo. Alt. 

 4000-8000 ft. Southeast of La Veta; Cimarron; La Veta; Cheyenne Canon; 

 Ft. Collins ; Colorado Springs ; Horsetooth Gulch ; east of Soldier Canon ; 

 Boulder. 



2. Tium racemosum (Pursh) Rydb. (Astragalus racemosus Pursh.) On 

 plains and hills, N. D. to Kans. and N. M. Oak Creek; Apishipa Creek, 

 Otero Co. ; east of Soldier Canon. 



3. Tium scopulorum (Porter) Rydb. (Astragalus scopulorum Porter; A. 

 rasus Sheldon) On hills and open woods in the mountains of Colo. Alt. 

 5000-9000 ft. Grand Junction ; Mancos ; Grayback mining camps and Placer 

 Gulch; Los Pinos; Cerro Summit; Cimarron; Dolores. 



4. Tium alpinum (L.) Rydb. (Astragalus alpinus L.) In the moun- 

 tains and in open woodlands from Lab. and Alaska to Vt. and Colo. Alt. 

 6000-11,000 ft. Lake City; Boulder Canon; near Empire; Carson; Twin 

 Lakes ; Veta Pass ; North Park ; Twin Lake Creek ; near La Plata Post 

 Office ; Mt. Harvard ; headwaters of Sangre de Cristo Creek ; Como, South 

 Park; Piedra; North Park, near Teller; Leroux Park; Michigan River; 

 Chambers' Lake ; Graymont. 



5. Tium sparsiflorum (A. Gray) Rydb. (Astragalus sparsifiorus A. 

 Gray) In the mountains of Colo. Alt. about 8000 ft. Cascade Canon. 



6. Tium huministratum (A. Gray) Rydb. (Astragalus huministratus A. 

 Gray) In the mountains from Colo, and Utah to N. M. and Ariz. Alt. 

 about 7000 ft. Los Pinos. 



7. Tium desperatum (Jones) Rydb. (Astragalus dcsperatus Jones) In 

 the mountains of Colo, and Utah. Grand Canon. 



15. ATELOPHRAGMA Rydb. 



Pods stipitate, flat. 



Pod long-stipitate, glabrous, at least in age. i. A. aboriginum. 



Pod short-stipitate, hairy. 2. A. Macounii. 



Pod sessile, more turgid. 



Racemes many-flowered ; leaflets oblong ; septum narrow. 



Racemes elongated ; pod short obovate. 3. A. elegans. 



Racemes short ; pod oblong. 4. A. Shearis. 



Racemes few-flowered ; leaflets linear ; septum broad. 5. A. Brandegei. 



1. Atelophragma aboriginum (Richardson) Rydb. (Phaca aboriginorum 

 Richardson) On mountain sides and in open woods from Alb. and Yukon 

 to Colo, and Nev. Alt. up to 10,000 ft. Mountain near Veta Pass. 



2. Atelophragma Macounii Rydb. (Astragalus Macouni Rydb.) In the 

 mountains from Alb. and B. C. to Colo. Exact locality not given. 



3. Atelophragma elegans (Hook.) Rydb. (Phaca elegans Hook.; Astra- 

 galus oroboides americanus A. Gray) In the mountains from Que., Sask. 

 and Idaho to Colo. Alt. 7000-13,000 ft. Georgetown; Mt. Lincoln; Lake 

 City; headwaters of Clear Creek; near Empire; South Park; Mancos; 

 North Park; Empire. 



4. Atelophragma Shearis Rydb. In the mountains of Colo. Twin Lakes. 



5. Atelophragma Brandegei (Porter) Rydb. (Astragalus Brandegei Por- 

 ter) In the mountains from Colo, and Utah to Ariz. Alt. about 6500 ft. 

 Arkansas River bluffs ; Pleasant Valley. 



