FABACEAE. 
215 
7. Parosela spinosa (A. Gray) Vail. ( Dalea spinosa A. Gray) In arid 
places from Colo, to Calif, and Ariz.; also Mex.—“ Colorado ”; exact locality 
not given. 
8. Parosela Dalea (L.) Britton. ( Dalea alopecuroides Willd.) Prairies 
from Ill. and Minn, to Tex. and Mex.—Denver {Eastwood). 
32. PETALOSTEMON Lam. Prairie Clover. 
Calyx glabrous; corolla white. 
Calyx pubescent. 
Corolla white or yellow; spike long and compact. 
Corolla rose or purple, very rarely white. 
Leaflets usually 5. 
Stem and leaves glabrous or sparingly hairy. 
Stem rather densely short-hairy. 
Leaflets 7-17, oblong. 
1. P. oligophyllas. 
2. P. compactus. 
3. P. purpureus. 
4. P. pubescens. 
5. P. villosus. 
1. Petalostemon oligophyllus (Torr.) Rydb. ( P. graciles oligophyllus 
Torr.) On plains from Ass. to Iowa, Colo, and Ariz.—Alt. 4000-7000 ft.— 
Ft. Collins; east of Colorado Springs; Canon City; New Windsor, Weld Co.; 
Cucharas Valley, near La Veta; Pueblo; Poudre River; Arkansas River; 
Fossil Creek; Dixon Canon; Boulder. 
2. Petalostemon compactus (Spreng.) Sweezy. {Dalea comp acta Spreng.; 
P. macrostachyus Torr.) On dry plains from Neb. to Wyo. and Colo.— 
Alt. 4000-5000 ft.—Denver; New Windsor, Weld Co.; near Timnath; Ft. 
Collins. 
3. Petalostemon purpureus (Vent.) Rydb. {P. violaccus Michx.) On plains 
and prairies from Ind., Sask. and Alb. to Mo. and N. M.—Alt. 4000-7000 
ft.—Colorado Springs; Boulder; La Porte, Larimer Co.; Sterling, Logan 
Co.; Cucharas Valley, near La Veta; Denver; Ft. Collins; Spring Canon; 
Horsetooth Gulch; Boulder. 
4. Petalostemon pubescens A. Nelson. Plains of Colo.—Berwind. 
5. Petalostemon villosum Nutt. In sandy soil from Sask. and Mont, to 
Mo. and Colo.—Alt. 4000-5000 ft.—Sterling, Logan Co. 
33. HEDYSARUM L. 
Calyx-teeth shorter than the tube; reticulations of the pod polygonal. 
1. H. marginatum. 
Calyx-teeth longer than the tube ; reticulations of the pods transversely elongated, 
usually reaching from the middle to the margins, without cross-veins. 
Leaflets elliptic-oblong, not fleshy; flowers 12-15 mm. long, purple; bracts lan¬ 
ceolate-subulate, 3-5 mm. long; internodes of the fruit 3-5. 
2. H. pabulare. 
Leaflets linear-oblong, somewhat fleshy; flowers about 10 mm. long, rose-purple; 
bracts lanceolate, 1.5-2 mm. long; internodes of the fruit 1-3. 
3. H. carnosuhim. 
1. Hedysarum marginatum Greene. {H. uintahcnse A. Nels.) On wooded 
hillsides of Wyo. and Colo.—Alt. up to 9000 ft.—Near La Plata Post Office; 
Pagosa Springs; Hesperus. 
2. Hedysarum pabulare A. Nelson. {H. Bakeri Greene) On hills of 
Colo, and N. M.—Alt. 6000-7000 ft.—Mancos; Cimarron; Canon City, Fre¬ 
mont Co.; Dolores; Palisades. 
