LEGUMINOSyE. (PULSK FAMILY.) 139 



2. D. acuminatum, DC. leaves ail crowded at ihe summit of tite stem 

 from wliitli arist s lln i hfin/nled naked raceme or /mnic/e ; leallcUs roun<l-<>v:itc, 

 taper-pointed, pjrecii both sides, the end one round (4-5' lon^). — Kith woods, 

 from Canada to the Gulf. 



3. D. pauciflbrum, DC. Leaves scattered alon^ the low (.S-15' high) 

 asoeiidin;; steins; leallets rhombic-ovate, blunti.sh, pale beneath; raceme ftu>- 

 foirered, terminal. — Woods, Ont. to I'enn., Mich., Kan., and southward. 



§ 2. Pod raised on a stalk {stipe) little if at all surpassing the deeply cleft calyx ; 



stems long and prostrate or decumbent ; racemes axillary and terminal. 

 « Stijiules conspicuous, orate, attenuate, striatey persistent ; racemes mostly simple. 



4. D. rotundifolium, DC. Soft-hairy all over, truly prostrate; leajlets 

 orbicular, or the odd one slightly rhomboid ; flowers purple ; pods almost equally 

 sinuate on both edges, 3 - .5-jointed ; the joints rhomboid-oval. — Dry rocky 

 wot)ds, N. Kng. to P'la., west to Minn., Mo., and La. 



Var. glabratum, Gray, is almost glabrous, otherwise nearly as the ordi- 

 nary form. — Mass. and N. Y. 



5. D. OChroletlCUm, INT. A. Curtis. Stems sparsely hairy, decumbent; 

 leaflets nearly glabrous, ovate, acute or obtuse, transversely reticulated be- 

 neath, the lateral ones smaller or sometimes wanting ; racemes much elongated ; 

 corolla whitish ; pods twisted, 2 -4-jointed, the large rhomboid joints smooth and 

 reticulated but the margins downy. — Woodlands, Md. and Va. 



* * Stipules smaller, lanceolate and aid-shaped, less persistent; racemes panicled. 



6. D. humifusum, Beck. Glabrous or nearly so, procumbent ; leajlets 

 ovate or ovate-oblong, rather obtuse, much smaller than in the two preceding 

 (lJ-2' long) ; corolla purple ; pods 2 -4-jointed, flat, the oval-rhomboid joints 

 minutely scabrous throughout. — Dry sandy soil, S. Penn. to Md. 



§ 3. Pod slightly if at all stalked in the calyx; racemes panicled. 



* Stems tall (3-5°) and erect ; the persistent stipules and deciduous bracts large 

 and conspicuous, ovate or ovate-lanceolate, taper-pointed ; floivers rather large. 



•*- Pods of i- 7 unequal-sided rhombic joints, ivhich are considerably longer than 

 broad {about 6" long). 



7. D. can6scens, DC. Stem loosely branched, hairy ; leajlets ovate, 

 bluntish, about the length of the petioles, tchitish and reticulated beneath, both 

 sides roughish with a close fine pubescence ; joints of the pod very atlhesive. — 

 Moist grounds, Mass. and Vt. to Minn, and southward, chiefly westward. 

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

 glutinous hairs. — Var. viLLosfssiMCM, Torr. & Gray, ha.s the panicle and upper 

 part of the stem very villous, and leaflets oblong-ovate. — Mo. 



8. D. CUSpid^tum, Torr. & Gray. Very smooth except the panicle ; .stem 

 straight ; leajlets 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 J' long. 



-t- H- Pods of 3-5 ov(d joints (not over 3" long). 



9. D. lUinoense, Gray. Erect (3-5'' I'ig'O ; stem and leaves with short 

 rough pubescence ; k'aflets ovate-oblong or ovate-lanceolate (2-4' long), ubtu.><e, 

 subcoriaceous, cinereous beneath, veins and veinlcts prominent, strongly retic- 



