FLOEA OF THE HAWAIIAN ISLANDS. 179 



Leaves of 5 or more plnnately arranged leaflets. 

 Stamens monadelphous or diadelphous. 



Under shrubs or herbs, not twining or climbing. 

 Pod not especially elongated. 



Stamens diadelphous; pod nearly terete, or tetra- 

 gonal, 2. INDIGOFERA. 



Stamens partially monadelphous; pod flattened, . . 3. TEPHROSIA. 



Pod elongated (6' -18' long), 4. SESBANIA. 



Herbs climbing by tendrils at the ends of the leaves, . . . 6. VICIA. 

 Stamens all free (Sophorese), 16. SOPHOEA. 



SUBORDER II. Caesalpiniese. Corolla irregular or nearly regular, imbricate in 

 the bud, the upper petal inside. 



Leaves twice pinnate. Pod prickly or not, 17. CLESALPINIA. 



Leaves once pinnate, 18. CASSIA. 



SUBORDER III. Mimosese. Corolla regular. Petals small, valvate in the bud. 

 Leaves twice pinnate. 



Stamens free and definite. Pod prickly, 19. MIMOSA. 



Stamens free and indefinite. Pod smooth, 20. ACACIA. 



TRIBE I. OENISTB^E. 



Leaves simple, or of 3 (rarely 5) digitate leaflets, all inserted at the end of the petiole. 

 Racemes terminal or leaf-opposed. Stamens all united in a tube. 



1. CROTALARIA Linn. 



Calyx 5-cleft. Standard broad. Wings free, transversely wrinkled 

 above the claw. Keel with a straight or curved point or beak. Sta- 

 mens all united in a sheath, open on the upper side. Anthers alter- 

 nately ovoid and oblong. Style suddenly bent in above the ovary. Pod 

 inflated. Herbs or shrubs. Leaves simple and subsessile, or with 

 3 - 5 digitate leaflets at the end of the petiole. Stipules very small. 

 Pedicels solitary to each bract, with bractlets clcrse under or even 

 upon the calyx. Flowers yellow, or rarely bluish or purplish. 



A large, chiefly tropical genus, with a few extratropical species in North America, 

 South Africa, and Australia. 

 Leaves simple. 



Raceme without large bracts. Leaves evenly tapering at both ends, 1. C. Assamica. 



Raceme with large ovate acuminate bracts. Leaves oblanceolate, 



blunt, mucronulate, ' . . 1. C. sericea. 



Leaves trifoliolatf, 3. C. longirostrata. 



1. C. ASSAMICA Benth. (Enum. No. 95.) An erect shrub, 6 - 10 

 high, with herbaceous branchlets. Leaves elongate-lanceolate, taper- 

 ing at both ends, glabrous above, sericeous below with soft, some- 

 what fulvous hairs, as also the branches and calyxes, 4' - 6' long, 1' or 

 more wide, very short petioled. Kacemes long and terminal, many- 

 flowered. Bracts subulate-lanceolate, 2" long. Bractlets about the 

 middle of the short pedicel. Calyx-lobes 4" - 5" long, but the lower 

 three joined two-thirds of the way up. Flowers |' long, yellow, a 



