FABACEAE. 213 



6. Aragallus sericeus (Nutt.) Greene. (Oxytropis sericea Nutt.) On 

 hills and table-lands from N. D. and Wyo. to N. M. and Ariz. Alt. 4000- 

 9000 ft Estes Park; Sargents; La Veta; Cimarron; Grayback mining 

 camps and Placer Gulch; Platte Canon; Horsetooth Gulch; Campton's 

 ranch; west of Rist Canon; Wray; Pinkham Creek. 



7. Aragallus monticola (A. Gray) Greene. (O. monticola A. Gray) On 

 mountain ridges from Sask. and Wash, to Colo. " Colorado " ; exact locality 

 not given. 



8. Aragallus albiflorus A. Nels. In mountain valleys of Wyo. and Colo. 

 Alt. 5000-11,000 ft. Cucharas Valley, near La Veta; butte five miles 

 southwest of La Veta; Iron Mountain; Placer; Ft Collins; Buena Vista; 

 Chambers' Lake; west of Rist Canon; Palmer Lake; Pennock's mountain 

 ranch; Campton's ranch, North Poudre. 



9. Aragallus Richardsonii (Hook.) Greene. (Oxytropis splendens 

 Richardsonii Hook.) In mountain valleys from Sask. and Yukon to Colo. 

 Alt. 8000-10,000 ft. North Park; Georgetown; Middle Park; Como, 

 South Park; mountain near Veta Pass; Twin Lakes; Indian Creek Pass; 

 Arkansas Junction, near Leadville; Eldora to Baltimore; Empire. 



28. GLYCYRRHIZA L. WILD LIQUORICE. 



i. Glycyrrhiza lepidota Nutt. Among bushes and in rich meadows from 

 Qnt. and Wash, to N. Y. and Ariz. ; also in Mex. Alt. 4OOO-Sooo ft. Colorado 

 Springs; Parlin, Gunnison Co.; Alamosa; Grand Junction; Huerfano Val- 

 ley, near Gardner; Arboles; Ft. Collins; Walcott; Pueblo; Denver; Poudre 

 Canon; Rist Canon; near Boulder. 



29. AMORPHA L. FALSE INDIGO, LEAD-PLANT. 



Tall shrub; leaflets 2-5 cm. long; pods usually 2-seeded. i. A. angustifolia. 



Low shrubs; leaflets 5-1.5 cm. long; pods i-seeded. 



Glabrous or nearly so ; spike usually solitary at the ends of the branches. 



2. A. nana. 



Densely canescent ; spikes usually clustered. 3. A. canescens. 



1. Amorpha angustifolia (Pursh) Boynton. (A. fruticosa angustifolia 

 Pursh; A. fruticosa James; not L.) Along streams from S. D. and Mont to 

 Fla. and Colo. Alt. 4000-5000 ft. Sterling, Logan Co. ; river flats and plains 

 east of Ft. Collins. 



2. Amorpha nana Nutt. (A. microphylla Pursh) On dry prairies from 

 Man. to Iowa and Colo. Palmer Lake. 



3. Amorpha canescens Pursh. Sand-hills and prairies from Ind. and Man. 

 to La., Tex. and Colo. Along Platte River. 



30. PSORALEA L. POME BLANCHE, INDIAN BREAD-ROOT. 



Flowers small, less than 8 mm. long, in racemes or interrupted spikes ; root not 



tuberous. 

 Flowers in racemes ; leaves not silvery. 



Racemes short and dense, elliptic or oblong; fruit globose, i. P. lanceolata. 

 Racemes lax, more elongated ; fruit ovoid. 2. P. tenuiflora. 



Flowers in interrupted spikes ; leaves silvery. 3. P. argophylla. 



Flowers large, over i cm. long, in dense head-like spikes ; plant with a deep-seated 

 tuberous, farinaceous root. 



