140 LEGUMINOS^. (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. 



* * Stevis {2-5° high) erect; stipules and bracts rnostli/ deciduous, small and 



inconspicuous; joints of the pod 3 -.5, triangular or half-rhombic or i-eri/ un- 

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

 viiddle-sized. 



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

 leaflets oi'a/e, 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 verij downg, rough at the summit; 

 leaflets broadlg ovate, very obtuse, rough above, ivhitened 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. Dillenii, Darlingt. Stem pubescent ; leaflets ohlong or oblong-ovate, 

 commonly l)lnntish, pale beneath, softly and flnelg pubescent, mostly thin (2-3' 

 long). — Open woodlands, common. 



13. D. panicul^tum, 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). — Tine 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, 1^-2^" long. 

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



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

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

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

 {^-Y ^^OHg)- — ^^^y rich woods, N. Brunswick to N. C, Minn., and Kan. 



16. D. sessilifolium, 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); Irracts small ; racemes or panicles elongated 

 and loosel y flowered ; flowers small. 



17. D. rigidum, DC. Stem hvaxxcWmg, some wliat hoary, \\\.e the lower 

 surface of the leaves, Avith a close roughisli pul)esceuce; leaflets ovate-oblong, 

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

 the petiole. — Dry liillsides, Ma.ss. to Fla., west to Mich., Mo., and La. 



18. D. Ciliare, DC. Stem slender, harry 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 (^-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 obtuse, thin, the lateral ones about the length of 



