112 



PAPILIONACEAE 



Flowers spicate or racemose. 

 Pods coiled. 

 Pods straight. 

 Flowers capitate. 

 Leaflets entire. 



Peduncles 1-flowered. 

 Flowers in spikes, racemes or clusters. 

 Herbage glandular-dotted. 

 Herbage not glandular-dotted. 

 Stipules not adnate to petiole. 

 Pods of several joints. 

 Pods one-jointed. 

 Stipules adnate to petiole. 

 Leaves pinnately many-foliolate. 

 Flowers not papilionaceous. 

 Corolla of but one petal. 

 Corolla of five petals. 

 Stamens 9 or 10. 

 Stamens 5. 



Flowers papilionaceous. 

 Trees. 

 Herbs. 



Pods not prickly. 

 Pods prickly. 

 Herbaceous vines. 

 Leaves pinnate. 

 Tendril-bearing. 

 Not tendril-bearing. 

 Leaves 3-foliolate. 



Keel of corolla not incurved. 

 Keel of corolla incurved. 



3. MEDICAGO. 



4. MELILOTUS. 



5. TRIFOLIUM. 



6. LOTUS. 



7. PSORALEA. 



14. MEIBOMIA. 



15. LESPEDEZA. 

 5. TRIFOLIUM. 



8. AMORPHA. 



9. PAROSELA. 



10. PETALOSTEMON. 



11. ROBINIA. 



12. ASTRAGALUS. 



13. GLYCYRRHIZA. 



16. VICIA. 



18. APIOS. 



17. FALCATA. 



19. STROPHOSTYLES. 



1. BAPTISIA Vent. WILD INDIGO. 



Much branching herbs with 3-foliolate leaves and racemose flowers. 

 Pod stalked in the persistent calyx, inflated. 



Plants glabrous. 



Flowers blue. 1. B. australis. 



Flowers white. 2. B. leucantha. 



Plants densely pubescent. 3. B. bracteata. 



1. B. australis (L.) R. Br. 2-3 high : leaflets oblanceolate : racemes 

 erect, loosely many-flowered : pods oblong. Sparingly adventized along 

 the railroad from Sheffield to Courtney. May. 



2. B. leucantha T. & G. 3-5 high : leaflets obovate : racemes erect, 

 very long, many-flowered : pods elliptical, on stalks twice the length of 

 the calyx. Prairies and glades throughout. Frequent. June-July. 



3. B. bracteata Ell. l-2 high : leaflets oblanceolate : stipules and 

 bracts conspicuous : racemes densely flowered, often drooping : flowers 

 yellow : pods ovoid, pointed. Common on prairies throughout the south- 

 western part. April-May. 



2. GROT AL ARIA L. 



Anthers of two forms. Pods inflated, many-seeded, the seeds loose and 

 rattling at maturity. 



