140 LEGUMINOSuE. (PULSE FAMILY.) 



ulated, the lower leaflets nearly equalling the petiole ; pods scarcely over 1 ' long, 

 sinuate on both margins (deeper below). Dry ground, 111. to Iowa and Kan. 



* * Stems (2-5 high) erect; stipules and bracts mostly deciduous, small and 



inconspicuous ; joints of the pod 3 5, triangular or half-rhombic or very un- 

 equal-sided rhomboidal, longer than broad, 3" or less in length ; flowers 

 middle-sized. 



10. D. laevigatum, DC. Smooth or nearly so throughout ; stem straight ; 

 leaflets ovate, bluntish, pale beneath (2-3' long); panicles minutely rough- 

 pubescent. Pine woods, N. J. to Fla., west to Mo. and Tex. 



11. D. viridiflorum, Beck. Stem very downy,TOUgh at the summit; 

 leaflets broadly ovate, very obtuse, rough above, whitened with a soft velvety 

 down underneath (2-3' long). Southern N. Y. to N. J. and Fla., west to 

 Mich., Mo., and Tex. 



12. D. Dill6nii, Darlingt. Stem pubescent ; leaflets oblong or oblong-ovate, 

 commonly bluntish, pale beneath, softly and flnely pubescent, mostly thin (2 -3' 

 long). Open woodlands, common. 



13. D. paniculatum, DC. Nearly smooth throughout; stem slender, 

 tall ; leaflets oblong -lanceolate, or narrowly lanceolate, tapering to a blunt point, 

 thin (3-5' long) ; racemes much panicled. Copses, common. 



14. D. Strictum, DC. Stem very straight and slender, simple (2-3 

 high), the upper part and narrow panicle rough-glandular ; leaflets linear, blunt, 

 strongly reticulated, thickish, very smooth (1 -2' long, ' wide) ; joints of the pod 

 1-3, semi-obovate or very gibbous (only 2" long). Pine woods, N. J. to 

 Fla. and La. 



# # * Stipules small and inconspicuous, mostly deciduous ; pods of few roundish 



or obliquely oval or sometimes roundish-rhomboidal joints, 1J-2J" long. 

 *- Stems erect; bracts before flowering conspicuous; racemes densely flowered. 



15. D. Canadnse, DC. Stem hairy (3-6 high) ; leaflets oblong -lanceo- 

 late or ovate-lanceolate, obtuse, with numerous straightish veins, much longer 

 than the petiole (1^-3' long) ; flowers showy, larger than in any other species 

 (i~i' long). Dry rich woods, N. Brunswick to N. C., Minn., and Kan. 



16. D. sessilifdlium, Torr. & Gray. Stem pubescent (2-4 high); 

 leaves nearly sessile ; leaflets linear or linear-oblong, blunt, thickish, reticulated, 

 rough above, downy beneath ; branches of the panicle long ; flowers small. 

 Copses, Penn. and Ky., west to Mich., Iowa, Mo., and Tex. 



*- - Stems ascending (1 -3 high); bracts small ; racemes or panicles elongated 

 and loosely flowered ; flowers small. 



17. D. rigidum, DC. Stem branching, somewhat hoary, like the lower 

 surface of the leaves, with a close roughish pubescence ; leaflets ovate-oblong, 

 blunt, thickish, reticulated-veiny, rather rough above, the lateral ones longer than 

 the petiole. Dry hillsides, Mass, to Fla., west to Mich., Mo., and La. 



18. D. ciliare, DC. Stem slender, hairy or rough-pubescent; leaves 

 crowded, on very short hairy petioles ; leaflets round-ovate or oval, thickish, more 

 or less hairy on the margins and underneath (i-1' long). Dry hills and 

 sandy fields, N. Eng. to Fla., west to Mich., Mo., and Tex. 



19. D. Marilandicum, F. Boott. Nearly smooth throughout, slender , 

 leaflets ovate or roundish, very obtuie, thin, the lateral ones about the length of 



