182 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Flowers in dense heads or umbels or in short, thick, very dense spikes. 



Pods curved or coiled; flowers yellow or bluish purple 6. MEDIC AGO. 



Pods not curved or coiled; flowers variously colored 8. TRIFOLIXJM. 



Leaflets entire or sometimes lobed, never toothed. 

 Plants with woody stems. 

 Plants erect, the stems acutely angled; leaflets rarely over 1 cm. long. 



5. CYTISUS. 

 Plants climbing, the stems obtusely angled; leaflets mostly 10 cm. long or 



larger 24. PUERARIA . 



Plants herbaceous. 

 Pods of 2 or more joints (the joints evident even in the ovary of the flower); 

 stipules sometimes bearing long yellow bristles. 

 Flowers yellow; stipules with long yellow bristles; leaflets small, usually 



less than 8 mm. wide 12. STYLOSANTHES. 



Flowers purple or purplish; stipules never bristly; leaflets usually much 



more than 1 cm. wide 13. MEIBOMIA. 



Pods not jointed; stipules never with yellow bristles. 



Flowers on axillary 1 or 2-flowered peduncles; corolla about 5 cm. long, 



pale blue. Pods flat 17. CLITORIA. 



Flowers variously arranged, the peduncles when axillary bearing more 

 than 2 flowers; corolla less than 2 cm. long, usually much smaller. 

 Stems erect, never twining. 

 Pods 1-seeded; flowera purple or yellowish white; stipules very 



small, brown 14. LESPEDEZA 



Pods with more than one seed; flowers never purple; stipules often 

 large and green. 

 Leaflets densely and finely hairy beneath, the veins coarse and 

 prominent beneath; petals only slightly longer than the calyx, 



yellow; pods flat 21. DOLICHOLUS. 



Leaflets glabrous or nearly so, the veins slender, not prominent: 

 petals much longer than the calyx; pods inflated. 



1. BAPTISIA. 

 Stems climbing, twining. 

 Flowers in heads or umbels; leaflets sometimes lobed. Flowers pink 



or white 2. STROPHOSTYLES. 



Blowers in racemes; leaflets not lobed. 

 Leaflets very obtuse or rounded at the apex. Flowers purple or 

 purplish; calyx with a small bract at the base. .20. GALACTIA. 

 Leaflets very acute. 

 Stems with numerous reflexed brown hairs. Flowers white to 



purple; pods finely hairy 19. FALCATA. 



Stems never with reflexed hairs; flowers purple; pods glabrous. 



22. PHASEOLUS. 



1. BAPTISIA Vent. Wild indigo. 



Flowers blue; stipules longer than the petioles, leaflike, persistent 1. B. australis. 



Flowers yellow; stipules minute, deciduous 2. B. tiuctoria. 



1. Baptisia australis (L.) R. Br. 



Low ground along the upper Potomac, abundant in some localities. May-June. 

 Southern states, north to Pa. 



2. Baptisia tinctoria (L.) K. Br. 



Dry woods; common. June-July. Eastern U. S. 



