156 



CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Leaflets 3 to 5-jugate. 



Leaflets small, 2 to 3.5 em. long, obtuse at both 

 ends. 



Leaflets usually 3 or 4-jugate, obovate or 

 oval-roundish, rounded at the top, glands 

 between the leaves; racemes few-flowered ; 

 pedicels 3 to 6 mm. long; legume coria- 

 ceous, dehiscent along the sutures. 

 Leaflets usually 5-jugate, oval or elliptical, 

 rounded at the top, a gland between the 

 lower leaves; racemes long and many- 

 flowered; pedicels 2 to 3 cm. long. 

 Leaflets large, ovate-oblong or ovate-lanceolate, 

 acuminate, 5 to 8 cm. long; petiole with ob- 

 long glands between the leaflets; legume te- 

 rete. 

 Legume flattened-corn pressed, membranous, bivalved, 

 convex; seeds compressed parallel to the dissepiments; 

 petiole with obtuse glands near the base. (Section 

 Oncolobium Vog.) 

 Leaflets 4 or 5-jugate, ovate or elliptic lanceolate, 2.5 

 to 5 cm. long. 

 Legume compressed-tetragonal, linear; seeds compressed 

 parallel to the valves, their larger diameter likewise 

 parallel to the valves. (Section Prososperma Vog.) 

 Leaflets 2 or 3-jugate, obovate or obovate-oblong, 1.5 

 to 5 cm. long; legume 10 to 20 cm. long, 4 to 6 mm. 

 wide. 

 Legume flat-compressed, bivalved; seeds compressed 

 parallel to the valves, with their longer diameter trans- 

 verse to them. (Section Chamaesenna DC.) 



Legume winged with a broad longitudinal wing on 



each valve; leaves 30 to 60 cm. long; leaflets 9 to 



12-jugate, oblong, truncate at the subsessile base, 



7.5 to 17.5 cm. long; petiole 3-angular, eglandular. 



Legume not winged. 



Leaves very small; leaflets 5 to 15-jugate, obo- 

 vate-oblong, ciliate on the margins, otherwise 

 glabrous; leaves fasciculate at the nodes; le- 

 gumes narrow. 

 Leaves much larger, pilose; leaflets 3 to 5-jugate, 

 rarely 2-jugate, broadly oval-oblong, very ob- 

 tuse, upper surface pubescent, lower surface 

 tomentose, eglandular; legume coriaceous, 

 linear, straight, glabrous, tumid at the mar- 

 gins. 

 Stamens 10 or fewer, all perfect, similar and but slightly une- 

 qual (rarely 2 or 3 abortive); anthers linear; pedicels soli- 

 tary, in pairs or fascicles, axillary or superaxillary ; common 

 peduncle very short; legumes flat, linear, elastic, 2-valved. 

 (Subgenus Lasiorhegma Vog. Section Oiamaecrista 

 DC.) 

 Leaflets 1-jugate, oblique, seminrbicular or semiobovate, 

 flabellate-nerved; petiole glandular; peduncle one- 

 flowered; legume hairy with adpressed down. 



4. C. bicapsularis. 



5. C. stahlii. 



6. C. laevigata. 



7. C. occidentalis. 



8. C. tora. 



9. C. alata. 



10. C. polyphylla. 



11. C. emarginata. 



12. C. dipkylla. 



