98 LEGUMIXOS^E. (PULSE FAMILY.) 



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

 celled. 1|. River-banks, common from N. New York westward July -Aug. 



4. A. list6rtais, Torr. & Gray. Low and spreading, branched from the 

 base, smoothish ; leaflets 11 -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-celled. JJ. Mason 

 Co.. Illinois, /'/. M<d. 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-bcariny) suture. (Phaca, L., DC.) 



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

 long, somewhat notched at the end, minutely hoary underneath ; jxduncles about 

 the lem/th of the leaces ; flowers ichite ; pods not stalked in the cali/x, globose-ovoid, 

 in/liitid, thinnish (\* long), pointed, grooved at the tivo sutures, which are both turned 

 inwards, but especially the inner. 1J. (Phaca neglecta, Torr. <f Gray.) Grav- 

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

 l-2 high, greener and less coarse than A. Canadcnsis, 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. Rol>"a>lisii. Nearly sjnooth and erect (1 high) ; slender; leaflets 

 7-11, elliptical, often notched; peduncles much longer than the leans; racems 

 loose, nearly 1-sided in fruit; flowers white (4" long) ; pods hunt/in;/, xt<dked in 

 the. calyx, obloii'j, boat-shaped, obtuse, the seed-bearing suture convex, the other 

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

 near Burlington, Vermont, Dr. Rolibins (1829). (Allied to Phaca austral 

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

 outer suture often slightly turned inwards. See addend. 



15. jESCHYJVOUIENE, L. SENSITIVE JOINT VETCH. 



Calyx 2-lippcd ; the upper lip 2-, the lower 3-cleft. Standard roundish : keel 

 boat-shaped. Stamens diadelphous in two sets of 5 each. Pod flattened, com- 

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

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

 the name, from alo~xyvop.V7), being ashamed). 



1. IE. llispida, Willd. Erect, rough-bristly; leaflets 37-51, linear; 

 racemes 3-5-flowored ; pod stalked, G-10-jointed. (i) Along rivers, S. 

 Pcnn., Virginia, and southward. Aug. Flowers yellow, reddish extvrnally. 



16. IIEDYSARUJJI, Tourn. HEDYSARUM. 



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

 obliquely truncate, not appcndagcd, longer than the wings. Stamens diadcl- 

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

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

 fjtovs, street, and apco/za, s/mll.) 



1. II. borcfilC, Nutt. Leaflets 13-21, oblong or lanc.-olate, nearly 

 glabrous ; stipules scaly, united opposite the petiole, raceme of many ddlcxcd 



