12 MERRILL. 



5. Herbs ; joints of the pods not ribbed. 



C. Leaves odd-pinnate; pod exserted -43. Aeschynomene 



G. Leaves even-pinnate; pod folded together within the calyx. 



44. Stnithia 

 4. Stamens united into a closed tu^e; leaves even-pinnate, the rachis ending 



in a'bristle; cultivated herbs with hypogeal fruit 45. Arachis 



3. Leaves digitately 2-foliolate; joints of the pod muricate 46. Zornia 



3. Leaves pinnately 3-foliolate or reduced to a single leaflet ; leaflets mostly 

 stipellate; vexillary filament free or more or less united with the others. 

 4. Ovary with from 2 to many ovules. 



5. Pod equaling or exceeding the caljrx, exserted. 

 G. Articulations of the pod distinct. 



7. Pod flattened 47. Desmodium 



7. Pod cylindric 5L Alysicarpus 



G. Pod obscurely or not articulated, but with transverse lines between 

 the seeds, or with transverse reticulations. 

 7. Pod flat, indehiscent, thin, with transverse lines between the 



seeds 49. Pseudarthria 



7. Pod inflated, dehiscent, with transverse reticvilations. 



50. Pycnospora 

 5. Pod folded together within the calyx. 



6. Calj^-teeth setaceous, not accrescent; leaflets longer tlian broad; 



flowers in very dense, spike-like or capitate racemes 52. TJraria 



G. Calyx-teeth lanceolate, accrescent; leaflets as broad, or broader than 



long; flowers few, in lax racemes 53. Loureo 



4. Ovary 1-ovuled; pods indehiscent, with a single seed. 



5. Scandent; flowers and fruit completely hidden by a large, membra- 

 naceous, accrescent bract 54. Phylacium 



5. Erect or suberect, herbaceous or suff rutescent ; flowers and fruits not 

 inclosed by bracts. 



6. Leaflets 1- or 3-foliolate, ample, stipellate 48. Monarihrocarpui 



G. Leaflets 3-foliolate, small, exst'ipellate 1 55. Lespedeza 



2. Fruit a dehiscent or indehiscent pod, not jointed. 



3. Leaves simple or with three or more digitately arranged leaflets. 

 4. Leaves simple. 



5. Trees 61. Inocarpus 



5. Herbs or imdershrubs. 



6. Stamens monadclphons ; herl)s with inflated, several- to many-seeded 



pods '. 32. Crotalaria 



6. Stamens diadelphous ; seeds few. 

 7. Pods dehiscent. 



8. Shrubby; leaves petioled, ample; flowers and fruits hidden by 



large, thin, persistent bracts 85. Flemingia 



8. Herbs with sessile or subsessile leaves, the flowers not hidden 

 by bracts, 

 n. Erect herbs from tuberous rootstocks; pod oblong, turgid. 



84. Eriosema 

 9. Roots not tuberous; pods globose, 1-seeded, or linear and 



several-seeded 34. Indigofera 



7. Pod indehiscent, 1-seeded; leaves glandular, petioled; racemes 



dense 35. Psoralea 



4. Leaves with 3 or more digitately arranged leaflets. 



5. Stamens monadelphous ; pods inflated 32. Crotalaria 



