ORDER 46. LEGUMINOS^E. 30 Y 



2 C. varia L. St. herbaceous, erect, smooth, branching; Ivs. sessile, smooth; 

 Ifts. 11 to 19, all subsessilc, oblong, obtuse; umbels long-pedunculate, 10 to 15- 

 fiowered; fls. pale purple. An elegant European species, 2 to 41' high, crowned 

 with many hemispherical umbels V diam. Jl. Sept. f 



22. HEDYS'ARUM, L. (Gr. r/c%, sweet, fyupa, smell.) Calyx 

 cleft into 5 linear-subulate, subequal segments ; keel obliquely truncate, 

 longer than the- wings; stamens diadelphous (9 and 1), and with tho 

 style abruptly bent near the summit; legume (loment) of several 

 1 -seeded joints connected by their middle. 14 Mostly herbaceous. 

 Lvs. unequally pinnate. 



H. bore ale Nutt. Sts. erect; Ivs. subsessile, of 6 to 10 pairs of oblong, smooth- 

 ish Ifts. ; stip. united, sheathing, with subulate points ; rac. spicate, on long ped- 

 uncles ; fls. numerous, deflexed ; cal. teeth short, tho lower longest ; keel longer 

 than the banner or wings ; joints of the legume 1 to 4, flat, suborbicular, rugose- 

 reticulate. On the precipitous sides of "VVilloughby Mt, Westmoro, Vt. 500f 

 above the lake balow, N. to Hudson's Bay. St. rigid, 1 to 2f high, very leafy. 

 Lfts. 5 to 8" by 2 to 4", obtuse-mucronulata. Rac. 2 to 4' long, ou rigid pedun- 

 cles 3 to 5'. Fls. large and handsome, violet-purple. Jn. Jl. 



23. DESMCTDIUM, DC. (Hedysarum L.) BUSH TREFOIL. (Gr. 

 6eojj,6(;, a bond ; in reference to the slightly connected joints of the 

 loment.) Calyx 5 -cleft, bilabiate, sometimes bibracteolate at base ; 

 vcxillum roundish ; keel obtuse ; stamens diadelphous (9 and 1), some- 

 times monadclphous ; legume (loment) compressed, jointed, constricted 

 most on the lower (dorsal) suture, the joints 1-seeded, separable, 

 mostly aculeate and adhesive. ^ Herbaceous or suffruticous. Lvs. 

 pinnately trifoliate. Fls. in racemes or panicles, purplish. 



Legumes distinctly stiped, the stipes about as long as the joints (a). 



a Stems prostrate, creeping. Lfts. round or oval Nos. 1, 2 



a Stems erect. Lfts. ovate, broadly or (in No. C) narrowly, (b). 



b Calyx teeth shorter than the tube Nos. 85 



b Calyx teeth longer than the tube, upper one notched Nos. 6 8 



upper one entire No. 9 



Legumes subsessile, tha stipes, if any, not exceeding the calyx (c). 

 C Bracts large, covering the flower buds, caducous (d). 

 C Bracts inconspicuous, smaller than the flower buds (e). 



d Stipules large (6 to 9" long), ovate-lanceolate Nos. 10, 11 



d Stipules quite small, subufate Nos. 12, 13 



e Leaflets large (2 to 3' by 1 to 2'), oblong-ovate. .Nos. 14, 15 



e Leaflets small, orbicular or oval Nos. 1613 



e Leaflets long, linear No. 19 



1 D. rottmdifolium DC. St. prostrate, hairy ; Ifts. suborbicular, hairy on both 

 sides ; bracts and stipules broadly ovate, acuminate ; rac. few-flowered ; loment 

 constricted on both margins nearly alike. A hairy, prostrate plant, 2 to 3f in 

 length, found in rocky woods throughout the U. S. Lvs. of 3 roundish Ifts., pale 

 beneath, 1 to 2' diam., on hairy stalks. Stip. cordate, reflexed, hairy. Pis. 

 purple, in axillary and terminal racemes. Pods about 6-jointed. Aug. 



2 D. humifusum Beck. St. procumbent, striate, nearly smooth ; Ifts. oval, sub- 

 pubescent ; stip. lance-ovate ; rac. axillary and terminal ; loment slightly con- 

 stricted on the upper margin, of 2 to 4, obtusely 4-angled joints. "Woods, "Waltham, 

 Mass. (Bigelow), Penn. (Muhl). A species much resembling the last, but tho 

 whole plant is much smoother, with smaller and narrower bracts. St. 2 to 3f 

 long. Lfts. oval or ovate, subacute. Aug. 



3 D. midiflorum DC. Lfts. roundish ovate, lluntly acuminate, slightly glaucous 

 beneath ; scape radical, panicled, smooth ; joints of the lomcnt obtusely triangu- 

 lar. Common in woods, TJ. S. and Can. It is remarkably distinguished by hav- 

 ing its leaves and fls. on separate stalks often distant from each other. St. 8 to 

 10' high, with several ternate, long-stalked, smoothish, terminal Ivs. Scape 2 

 to 3f long, slender, smooth, leafless, panicled, with many small, purple flowers. 

 Aug. 



