FABACEAE. 
197 
2. THERMOPSIS R. Br. 
Pods erect or ascending. 
Pods straight. 
Pods strictly erect and appressed, densely pubescent; stipules narrow. 
1. T. montana. 
Pods ascending-erect, sparingly pubescent; stipules broad. 
2. T. pinetorum. 
Pods arcuate, with spreading tips. 3. T. divaricarpa. 
Pods strongly divaricate or reflexed, curved. 
Pods mostly horizontal, arcuate. 4. T. arenosa. 
Pods reflexed, curved in a half-circle or more. 5. T. rhombifolia. 
1. Thermopsis montana Nutt. {T. stricta Greene) In meadows from 
Mont, and Wash, to Colo., Utah and Ore.—Alt. 5000-9000 ft.—Hounold; 
Larimer Co.; Grayback mining camps and Placer Gulch; along Conejos 
River, north of Antonito; Sapinero; Gunnison. 
2. Thermopsis pinetorum Greene. In open woodlands and on hillsides in 
Colo, and N. M.—Alt. 5000-9000 ft.—Chicken Creek, West La Plata Moun¬ 
tains; East Indian Creek; Los Pinos (Bayfield); Grayback mining camps 
and Placer Gulch; Table Rock; foot of Horsetooth Mountain; Rist Canon; 
Boulder; Colorado Springs; Marshall Pass. 
3. Thermopsis divaricarpa A. Nels. In valleys and on foot-hills in Wyo. 
and Colo.—Alt. 5000-11,000 ft.—Denver; Cucharas Valley, near La Veta; 
Veta Mountain; Ute Pass; Sangre de Cristo Creek; mountain near Veta 
Pass; Ft. Collins; Howe’s Gulch; Beaver Creek; Horsetooth Mountain; 
Cache la Poudre; foot-hills near Boulder; Eldora to Baltimore; Rist Canon; 
Anita Peak. 
4. Thermopsis arenosa A. Nels. In sandy soil from Sask. and Mont, to 
Colo.—Alt. 8000-10,000 ft.—Empire; Eldora to Baltimore. 
5. Thermopsis rhombifolia (Nutt.) Richardson. In sandy soil from Sask. 
and Mont, to Colo.—Alt. 4000-8000 ft.—Manitou; butte five miles southwest 
of La Veta; mesas near Colorado Springs; Black’s Lake; west of Soldier 
Canon; north of La Porte; north of Ft. Collins; Trinidad. 
3. LUPINUS L. Lupine. 
A. Perennials; cotyledons petioled after germination. 
I. Stems tall, 3 dm. or more, scarcely cespitose. 
1. Leaves glabrous above, at least in age. 
Stem pubescent with long and spreading hairs or glabrous. 
Banner not with a dark spot; leaflets of the basal leaves oblanceolate, 
acute. 1. L. amplus. 
Banner with a dark spot; leaflets of the basal leaves spatulate, obtuse, 
mucronate. 2. L. ammophilus. 
Stem appressed-pubescent, at least above. 
Flowers large, over 12 mm. long; banner with a dark spot. 
3. L. plattensis. 
Flowers small or middle-sized, 12 mm. or less long; banner not with a 
dark spot. 
Plant green; stem and lower surface of the leaves sparingly appressed- 
pubescent. 
Flowers middle-sized, 8-12 mm. long. 
Plant purplish ; calyx strongly gibbous at the base. 
4. L. rubricaulis. 
Plant green; calyx not strongly gibbous. 5. L. alpestris. 
Flowers very small, 6-8 mm. long. 
