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 Cafion ; 

 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 sparsiAorus 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 desperatus 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. 



I. 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. 



is. 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. 



