136 LEGUMINOSJE. (PULSE FAMILY.) f 



roughish with a close fine pubescence ; joints of the pod very adhesive. Moist 

 grounds, W. Vermont to Wisconsin and southward, chiefly westward. 

 Branches clothed with both minute and hooked, and longer, spreading, rather 

 glutinous hairs. 



8. D. cuspidatum, Torr. & Gray. Very smooth except the panicle ; stem 

 straight ; leaflets lanceolate-ovate and taper-pointed, green both sides ; longer than 

 the petiole (3'- 5') ; joints of the pod rhomboid-oblong, smoothish. Thickets : 

 common. The conspicuous bracts and stipules f ' long. 



* * Stems (2 -5 high) erect: stipules as well as the bracts mostly deciduous, small 



and inconspicuous : pods of 3 5 triangular or half-rhombic or very unequal- 

 sided rhomboidal joints, which are longer than broad, % or less in length. (Flow- 

 ers middle-sized. ) 



9. D. l86Vigatuni, DC. Smooth or nearly so throughout : stem straight ; 

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

 pubescent. Pine woods, New Jersey and southward. 



10. D. viridiflbrum, Beck. Stem very downy, rough at the summit; 

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

 underneath (2' -3' long). S. New York and southward. 



11. D. Dill&nii, Darlingt. Stem pubescent ; leaflets oblong or oblong-ovate, 

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

 long). Open woodlands : common. 



12. 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. 



13. 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 (l'-2' long, ' wide) ; joints of the pod 

 1-3, semi-obovate or very gibbous (only 2" long). Pine woods of New 



.Jersey, and southward. 



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



obliquely oval or sometimes roundish-rhomboidal joints, l^"-2^" long. 

 - Stems erect: bracts before flowering conspicuous : racemes densely flowered. 



14. D. Canadense, DC. Stem hairy (3 - 6 high) ; leaflets oblong-lance- 

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

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

 ('-' l n g)- Dry, rich woods: common, especially northward. 



15. 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, Pennsylvania and Michigan to Illinois and southward. 



---t- Stems ascending (l-3 high): bracts small; racemes or panicles elongated 

 and loosely flowered: flowers small. 



16. 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 thd" 

 the petiole. Dry hillsides, Mass, to Michigan, Illinois, and southward. In- 

 termediate, as it were, between No. 17 and No. 11. 



