MERRILL. 
5. Herbs; joints of the pods not ribbed. 
6. Leaves odd-pinnate; pod exserted ..v 43. Aeschynomene 
6. Leaves even-pinnate; pod folded together within the calyx. 
44. Smithia 
4. Stamens united into a closed tube; 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 murieate 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 calyx, exserted. 
6. Articulations of the pod distinct. 
'7. Pod flattened . : 47. Desmodium 
7. Pod cylindric 51. Alysicarpus 
6. 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 reticulations. 
50. Pycnospora 
5. Pod folded together within the calyx. 
6. Calyx- teeth setaceous, not accrescent; leaflets longer than broad; 
flowers in very dense, spike-like or capitate racemes 52. Uraria 
6. Calyx-teeth lanceolate, accrescent; leaflets as broad, or broader than 
long; flowers few, in lax racemes...- hhi* 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 suffrutescent; flowers and fruits not 
inclosed by bracts. 
6. Leaflets 1- or 3-foliolate, ample, stipellate 48. Monarthrocarpus 
6. Leaflets 3-foliolate, small, exstipellate 55. Lespedesa 
. 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 undershrubs. 
6. Stamens monadelphous ; herbs with inflated, several- to many-seeded 
pods 32. Grotalaria 
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. 
9. 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. Grotalaria 
