98 IEGUMIXOS4C. (PULSE FAMILY.) 



long and close spikes (4'- 9'); pods ovoid-oblong, coriaceous,, completely 2- 

 celled. 11 River-banks, common from N. New York westward July -Aug. 



4. A. distdl'tus, Torr. & Gray. Low and spreading, branched from the 

 base, smoothish ; leaflets 1 1 - 23, oblong or obovatc ; flowers purplish or violet, 

 10-20 in a short spike, the standard deeply notched at the summit; pods ob- 

 long, turgid, incurved (' long), coriaceous, incompletely 2-cellcd. 1J. Mason 

 Co., Illinois, Dr. Mead. May. (Also in Arkansas and Texas.) 



$ 3. Pod dry and dehiscent, l-celled, or incompletely 2-cel!ed by the projection of the 

 ventral (seed-bearing) suture. (Phaca, L., DC.) 



5. A. Cooperi. Nearly smooth, erect; leaflets 11-21, elliptical or ob- 

 long, somewhat notched at the end, minutely hoary underneath ; peduncles atwit 

 the length of the leaves ; flowers white ; }>ods not stalked in the calyx, globose-ovoid, 

 inflated, thinnish (%' long), pointed , grooved at the two sutures, which are both turned 

 inwards, but especially the inner, ty (Phaca neglecta, Torr. <J* Gray.) Grav- 

 elly banks of rivers, c., W. New York to Wisconsin. June, July. Plant 

 l-2 high, greener and less coarse than A. Canadensis, with pure white flowers 

 in shorter and more open spikes : calyx shorter. (Named for William Cooper, 

 Esq., the discoverer: there being an A. neglectus.) 



6. A. Robbilisii. Nearly smooth and erect (1 high) ; slender; leaflets 

 7-11, elliptical, often notched; peduncles much longer than the leaves; raceme 

 loose, nearly 1-sided in fruit; flowers white (4" long) ; pods hanging, stalkf-d in 

 the calyx, oblong, boat-shaped, obtuse, the seed-bearing suture convex, the other 

 nearly straight. (Phaca Robbinsii, Oakes.) Rocky ledges of the Onion River, 

 near Burlington, Vermont, Dr. Robbins (1829). (Allied to Phaca austrntis, u 

 &c.) June. Pods 6" -7" long, l-celled, papery and veiny, smooth, the 

 outer suture often slightly turned inwards. See addend. 



15. JESCHYNOMENE, L. SENSITIVE JOINT VETCH. 



Calyx 2-lipped ; the upper lip 2-, the lower 3-clcft. Standard roundish : keel 

 - Kit-shaped. Stamens diadclphous in two sets of 5 each. Pod flattened, com- 

 posed of several square easily separable joints. Leaves odd-pinnate, with sev- 

 eral pairs of leaflets, sometimes sensitive, as if shrinking from the touch (whence 

 the name, from alo~xyvoiJ.vri, being aslianud). 



I. JE. Iiispida, Willd. Erect, rough-bristly; leaflets 37-51, linear, 

 *eemes 3 - 5-flowcred ; pod stalked, 6-10-jointed. (i> Along rivers, S. 

 enn., Virginia, and southward. Aug. Flowers yellow, reddish cxtarnally. 



16. IIEDYSARUM, Tourn. HEDYSAKOI. 



lyx 5-cleft, the lobes awl-shaped and nearly equal. Keel nearly straight, 

 . .iiiquely truncate, not appendaged, longer than the wings. Stamens diade.1- 

 phous, 9 & 1. Pod flattened, composed of several equal-sided separable round- 

 ish joints connected in the middle. Leaves odd-pinnate. (Name composed of 

 if&vs, sweet, and pco/ia, snuU. 



1. II. borcale, Nut*. Leaflets 13-21, oblong or lane.-olate, nearly 

 glabrous; stipules scaly, united opposite the petiole, raceme of many drflex- d 



