136 LEGUMINOS.E. (PCLSE FAMILY.) 



roup:hish with a close fine pubescence; joints of the pod very adhesive. — Moist 

 grounds, W. Vermont to Wisconsin and soiitliward, chiclly westward. — 

 Branches clotiied witii both minute and hoolced, and longer, spreading, rather 

 glutinous hairs. 



8. D. CUSpid^tum, Torr. & Gray. TVr/y swoo/Zi except the panicle; stera 

 straight; lenjiits Itmccolutc-ocale ami tajier-jjointtd, green both sides ; longer than 

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

 common. — The consi)icuous bracts and stipules \' long. 



* * Stems (2°-50 hiijit) erect: sti/mles as well as the bracts niostlj/ deciduous, smull 



and inconspicuous : pods 0/3-5 triamjular or katf-rhombic or very unequal- 

 sided I'ltomlioidal joints, which are longer t/uin broad, ^' or less in length. (Flow- 

 ers miildh-sizid. ) 



9. D. Isevigatum, DC .Swwrt or nearly so throughout: stem straight ; 

 leajlets ovate, bluntish, pale beneath (2' -3' long); piinicles minutely rough- 

 pubescent. — Pine wouds, New Jersey and southward. 



10. D. Viridifl6rum, Beck. Stem vcrij dowiii), rough at the summit; 

 leaflets broadh/ ovate, very obtuse, rough above, whitened with a sojl velvety down 

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



11. D. Dillenii, Darlingt. Stem pubescent ; leajlets oblong or oblong-ovate, 

 commonly blunti>li, pale beneath, softly and Jinely pubescent (mostly thin, 2' -3' 

 long). — Open woodlands: common. 



12. D. paniculatum, 1>C. Nearly smooth throughout; stem slender, 

 tall ; leajlets 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 uj)per part and narrow panicle rough-glandular; leajlets linear, blunt, 

 strongly reticulated, thiclcish, very smooth (I' -2' long, 4' wide) ; joints of the pod 

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

 Jersey, and southward. 



* * * iSli/>ules small and inconspicuous, mosdy deciduous : jiods oj few roundish or 



obliquely oral or sometimes roundish-rhontboidal joints, l|-"-2i" long. 

 •»- Stems erect : bracts before Jiowering conspicuous : racemes densely Jlowered. 



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

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

 than the petiole (l.^'-3' long) ; Jlow/rs showy, larger than in any other species 

 {y~l' long). — Dry, rieh woods: common, especially northward. 



15. D. seSSilifblium, Ton-. & Gray. Stem pubescent (2° -4° high); 

 leaves nearly sissile; leajiels linear or linear-oblong, blunt, thickish, reticulated, 

 rough above, downy bcnentli ; branches of the ])anicle \onff ; fowers small. — 

 Co])ses, Pennsylvania and Michigan to Illinois and southward. 



t--*- Stems ascending {\° -3° hii/h) : brarts small; r-acemes or panicles elongated 

 and loosely Jlomred : Jlowers aniall. 

 10. D. rlgidum, DC. Stem branching, somewhat hoary, like the lower 

 surface of the leaves, with a close roughish jiubcsccnce ; leajlets ooate-oblong, 

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

 the petiole. — Dry hillsides, Mass. to Michigan, Ulinoi.s, and southward. — In- 

 termediate, as it were, between No. 1 7 and No. 1 1 . 



