Order 45.— LEGUMINOS^. 307 " 



2 C. viria L. St. herbaceous, erect, smooth, branching; Ivs. eessile, smooth; 

 lila. 11 to 19, all Bubseasile, oblong, obtuse; umbels long-pedunculate, 10 to 15- 

 flowered ; fls. pale purple. — An elegant European species, 2 to if high, crowned 

 ■\vith many hemispherical umbels 1' diam. Jl. — Sept. \_ 



22. HEDYS'ARUM, L. (Gr. ridv^, sweet, a^ufxa, smell.) Calyx 

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

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

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

 1-secded joints connected by their middle. — ^ Mostly herbaceous. 

 Lvs. unequally pinnate. 



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

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

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

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

 reticulate. — On the precipitous sides of Willoughby ilt,, "Wcstmoro, Vt. 500f 

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

 Lfts. 5 to 8" by 2 to 4", obtuse-mucronulato. Eac. 2 to 4' long, on rigid pedun- 

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



23. DESMO'DIUra, DC. (Iledysarum L.) Bush Trefoil. (Gr. 

 Ssaixbg, a bond ; in reference to the slightly connected joints of the 

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

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

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

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

 mostly aculeate and adhesive. — U Herbaceous or sutFruticous. Lvs. 

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



S Legumes distinctly stiped, the stipes nboiit ns long? ns tli(S joints (a). 



a Stems ]>rnstrftte, creeping. LftH. round or oval Nos. 1, 2 



a Stems erect. Ll^. ovate, broadly or (in No. 6) narrowly, (b). 



b Oaly.x teeth shorter than the tube Noa. § — 5 



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



— upper one entire No. 9 



S Legumes sn1>sessile, the stipe-s, if any, not exceeding the calyx (c). 

 C Uracts 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, subulate Nos. 12, 13 



o Leaflets large (3 to 3' by 1 to 2'), obloi)g-ovate. .No-i. M, 1» 



e Leaflets small, orbicular or oval Nos. 16-— 13 



e Leaflets loug, linear No. 19 



1 D. rotundifolium DC. St. prostrate, hainj ; Ifts. suborhicular, hairy on both 

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

 constricted on both margins nearly alike. — A haiiy, prostrate plant, 2 to 3f ki 

 length, found in rocky woods throughout tho U. S. Lvs. of 3 roundish Ifts., palo 

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

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



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

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

 stricted on the upper margin, of 2 to 4, obtusely 4-angled joints. — Wood-;, Waltham, 

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

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

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



3 D. iiudiflorum DC. Lfts. roundish cvate, llunily acuminate, slightly glaucous 

 beneath ; scape radical, panioled, smooth ; joints of the loment obtusely triangu- 

 lar. — Common in woods, U. 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 temate, long-stalked, smoothish, terminal lvs. Scape 2 

 to Sf long, slender, smooth, leafless, paniclod, with many small, purple flowara. 

 Aug. 



