PAPIUONACEAE 



181 



Pods curved or coiled. 

 Pods straight. 



Pods leathery. 



Pods membranous. 



A single genus in our range. 



Tribe III. TRIFOUEAE. 



Tribe IV. LOTEAE. 



6. Medicago. 



7. Melilotus. 



8. Trifolium. 



9. I<OTUS. 



Tribe V. GALEGEAE. 

 Standard with a blade as broad as long or broader, commonly spreading. 

 Leaf-blades unequally pinnate. 



Herbs. 10. Cracca. 



Shrubs or trees. 11. Robinia. 



I,eaf -blades equally pinnate. 12. Sesban. 



Standard with a relatively narrow, usually erect blade. 13. Astragalus. 



Tribe VI. 

 Single genus in our range. 



PSORALEAE. 



Tribe VII. HEDYSAREAE. 

 I,eaf-blades pinnately several-foHolate. 

 Flowers umbellate : corolla purplish. 

 Flowers not titnbellate : corolla yellow. 

 Leai-bladeS 3-foliolate. 

 Corolla yellow. 



Corolla white, blue, purple or violet. 

 Leaflets stipellate ; loments of several joints. 



14. Amorpha. 



15. coronilla. 



16. Aeschvnomene. 



17. Stylosanthes. 



18. Meibomia. 



Leaflets not .stipellate : lomentsofi or rarely 2 joints, ig. Lespedeza. 



Tribe VIII, PHASEOLEAE. 

 Keel neither curved nor coiled. 

 Style glabrous or sparingly pubescent below. 

 Standard not spurred at the base. 

 Calyx subtended by two bractlets. 

 Calyx without bractlets. 

 Standard spurred at the base. 

 Style bearded along the inner side. 

 Keel coiled or curved. 

 Keel spirally twisted. 

 Leaves without stipels : leaflets 5 or more. 

 Leaves with stipels : leaflets 3. 

 Keel incurved. 



Tribe IX. VICIEAE. 

 Style terete, with a tuft of hairs at the apex. 

 ' Style flattened, pubescent along the inner side. 



1. BAPTISIA Vent. 



Corolla blue : pods over 15 mm. long. i. B. australis. 



Corolla yellow : pods less than 15 mm. long. 2. B. tinctoria. 



1. Baptisia australis (L.) R.Br. Bi,uE Wii,D OR Bi,ua Fai,se Indigo. 

 (Man. p. 535 ; I. F. f. 2049.) In rich soil, western Pa. to Mo., south to 

 Ga. and Ark. — Pennsylvania : Ci<arion ; Ai,i,EGHEny ; Faybtte. 



20. Galactia. 



21. Falcata. 



22. BRADBURYA. 



23. Clitoria. 



24. Apios. . 



25. Phaseolus. 



26. Strophostyles. 



27. ViCIA. 



28. Lathyrus. 



