210 
FABACEAE. 
10,000 ft.—Lake City; Canon City; Como, South Park; Big South; Stove 
Prairie Hill; Gore Pass; Rabbit-Ear Range; North Park; Estes Park; 
forks of Poudre and Big South; mountains of Larimer Co.; Pinkham Creek. 
10. Homalobus decurrens Rydb. On wooded hills in Colo.—Alt. 8000- 
10,000 ft.—Estes Park; Grayback mining camps and Placer Gulch; Como; 
Stove Prairie Hill. 
11. Homalobus hylophilus Rydb. On wooded hillsides from Mont, and 
Ida. to Colo, and Utah.—Alt. about 8000 ft.—Cerro Summit; North Park, 
near Teller; Leadville; Empire. 
12. Homalobus tenuifolius Nutt. From the Canadian Rockies to the 
mountains of Colo.—Lake City. 
13. Homalobus junciformis (A. Nels.) Rydb. ( Astragalus junciformis A. 
Nels.) On dry plains and hills from Mont, to Colo, and Utah.—Alt. about 
7000 ft.—Glenwood Springs; Cedar Edge. 
14. Homalobus Hallii (A. Gray) Rydb. ( Astragalus Hallii A. Gray) In 
the mountains of Colo.—Alt. 7000-10,000 ft.—South Park; Garland; Como, 
South Park; Leadville; Alamosa; Dolores; Horsetooth Gulch; Como, South 
Park; Black Canon. 
15. Homalobus Fendleri (A. Gray) Rydb. (A. Fendleri A. Gray) On 
dry hills of Colo, and N. M. —Alt. 4000-7000 ft.—Mancos; Los Pinos. 
16. Homalobus flexuosus (Dougl.) Rydb. ( Phaca dexuosa Hook; A. flex- 
uosus Dougl.) On dry plains and hills from Minn., Sask. and Alb. to Kans. 
and Colo.—Alt. 4000-9000 ft.—Upper Arkansas; South Park; Los Pinos; 
Salida; Gunnison; New Windsor; Buena Vista; Veta Pass; Idaho Springs; 
Sangre de Cristo Creek; Cucharas River, below La Veta; foot-hills, Larimer 
Co.; Grayback mining camps and Placer Gulch; Ft. Collins; northwest of 
Soldier Canon; Horsetooth Gulch; Almelia; Estes Park; near Boulder; Em¬ 
pire. 
17. Homalobus proximus Rydb. On dry hills of Colo.—Arboles. 
18. Homalobus Salidae Rydb. On hills in Colo.—Salida. 
19. Homalobus macrocarpus (A Gray) Rydb. ( Phaca macrocarpa A. 
Gray; A. lonchocarpus Torr.) In open woods from Colo, and Utah to N. 
M.—Alt. 6000-10,000 ft.—Pagosa Springs; Thompson Park, La Plata Moun¬ 
tains; Turkey Creek and tributaries; Arboles; Durango. 
25. PHACA L. 
Upper suture not acute; pod circular or oval in cross-section. 
Pod short-stipitate. 
Pod not mottled, erect or ascending. 
Pod ashy, with minute white hairs. 11. P. IVetherillii. 
Pod glabrous. 1. P. Eastwoodiae. 
Pod mottled, spreading or reflexed. 
Leaflets linear or none; plant grayish-pubescent. 
Terminal leaflet none, represented by the much produced rachis; lateral 
leaflets also often absent. 2. P. longifolia. 
Leaflets present; rachis not produced. 3. P. picta. 
Leaflets broadly oval or obcordate; plant glabrous. 4. P. artipes. 
Pod sessile. 
