212 
FABACEAE. 
2. Orophaca aretioides (Jones) Rydb. ( Astragalus sericoleucus aretioides 
Jones) On dry hills and plains of Wyo. and Colo.—Alt. about 5000 ft.—Ft. 
Collins; vicinity of Horsetooth; plains near Denver. 
3. Orophaca sericea (Nutt.) Britton. ( Phaca sericeus Nutt.; A. sericoleu¬ 
cus A. Gray) On plains and hills from Neb. to Wyo. and Colo.—Julesburg. 
27. ARAGALLUS Necker. Oxytrope, Loco-weed. 
Stipules adnate to the petioles only slightly at the base; pods pendant, i-celled, 
many times exceeding the calyx. 1. A. deflexus. 
Stipules decidedly adnate to the petioles ; pods not pendant. 
Leaves strictly pinnate; leaflets opposite. 
Fruiting calyx inflated, enclosing the fruit; plants densely cespitose, less than 
1.5 dm. high. 2. A. multiceps. 
Fruiting calyx not inflated, much exceeded by the pod. 
Inflorescence 1-3-flowered; plants dwarf, pulvinate. 
Pods inflated, 1-celled, ovoid. 3. A. Hallii. 
Pods not inflated, oblong, almost 2-celled. 4. A. Parryi. 
Inflorescence many-flowered; plants mostly over 1.5 dm. high and pod 
oblong, not inflated. 
Corolla purple, rarely white. 
Leaflets linear or linear-lanceolate, not silvery-canescent. 
5. A. Lambertii. 
Leaflets oblong-lanceolate to oval, silvery-canescent. 6. A. sericeus. 
Corolla yellow or white with a purple spot on the keel. 
Flowers 12-15 mm. long; pods semi-membranaceous. 
7. A. monticola. 
Flowers 18-25 mm. long; pods coriaceous. 8. A. albidorus. 
Leaflets verticillate. 9. A. Richardsonii. 
1. Aragallus deflexus (Pall.) Heller. ( Oxytropis deflexa (Pall.) DC.) In 
the mountains from Sask. and Alaska to N. M.—Alt. 6000-11,000 ft.—Near 
Empire; Lake City; Como, South Park; North Park, near Teller; George¬ 
town; Sangre de Cristo Creek; Sargent; Twin Lakes; Alamosa; Kremm- 
ling; Carson; North Park; Arboles; Dolores; along the Conejos River, 
north of Antonito; Buena Vista; Empire; Hahn’s Peak. 
2. Aragallus multiceps (Nutt.) Heller. ( Oxytropis multiceps Nutt.) On 
dry hills and mountains from western Neb. to Wyo. and Colo.—Alt. 4000- 
10,000 ft.—Table Rock; Calhan; Manitou golf links; Colorado Springs. 
Aragallus multiceps minor (A. Gray) Rydb. ( Oxytropis multiceps minor 
A. Gray) In the mountains of Colo.—Alt. 8000-10,000 ft.—Mountains be¬ 
tween Sunshine and Ward; Empire; mountains of Estes Park; headwaters 
of Clear Creek; Caribou. 
3. Aragallus Hallii (Bunge) Rydb. ( Oxytropis Hallii Bunge) On high 
mountains of Colo.—Alt. 10,000-11,000 ft.—Little Veta Mountain. 
4. Aragallus Parryi (A. Gray) Greene. ( Oxytropis Parryi A. Gray) In 
high mountain valleys of Colo.—Georgetown. 
5. Aragallus Lambertii (Pursh) Greene. (O. Lambertii Pursh) On 
plains, prairies, hills and table-lands from Minn, and Mont, to Mo. and 
Colo.—Alt. 4000-9000 ft.—Boulder; Colorado Springs; Cheyenne Canon; 
headwaters of Pass Creek; Cucharas River, below La Veta; mesas near 
Colorado Springs; between Colorado Springs and Cripple Creek; Horsetooth 
Gulch; Palmer Lake; Howe’s Gulch; Poudre Flats; mountains between 
Sunshine and Ward; near Boulder; Eldora to Baltimore; Hardin’s ranch; 
Table Rock. 
