ORDER 46. LEGUMINOS^E. 30T 



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

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

 flowered ; fls. pale purple. An elegant European species, 2 to 4f high, crowned 

 with many hemispherical umbels 1' diam. Jl. Sept. f 



22. HEDYS'ARUM, L. (Gr. 7)^?, sweet, cSpw/wz, smell.) Calyx 

 deft into 5 linear-subulate, 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 -seed eel joints connected by their middle. 1i Mostly herbaceous. 

 Lvs. unequally pinnate. 



H. borcale Nutt. Sts. erect; Ivs. subsessile, of G to 10 pairs of oblong, smooth- 

 ish lft=. ; stip. united, sheathing, with subulata points ; ra<.-. 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, suborbicular, rugose-" 

 reticulate. On the precipitous sides of "\Villoughby lit., Vestmore, Vt. 500f 

 abovo the Like b3lo\v, N. to Hudson's Bay. St. rigid, 1 to 2f high, very leafy. 

 Lftf. 5 to 8" by 2 to 4", obtuse-rnucronulatc'. Rac. 2 to 4' long, oa rigid pedun- 

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



23. DESMO'DIUM, DC. (Ilcdysarum L.) LUSH TREFOIL. (Gr. 

 Aeafj.bc, a bond; in reference to the slightly connected joints of tho' 

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

 vexillum roundish; keel obtuse ; stamens diadelphous (9 and 1), som<j- 

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

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

 mostly aculeate and adhesive. ~4 Herbaceous or suflfruticous. Lvs., 

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



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



a Steins prostrate, ereepinir. Lt'ts. round or oval Nos. 1, 3 



a Stums cruet. Lns. ovate, broadly or (\n No. 6) narrowly, (b). 



b Calyx teeth .shorter than the tube Nos. 35. 



b Calyx teetli longer than the tube, upper one notched Nos. C 8 



upper one entire No. 9 



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

 C Ilracts lame, covering the flower buds, caducous (d). 

 C IJracts incons]iie!ious, smaller than the flower buds (e). 



d Stipules large (0 to 9" long), ovate-lanceolate Nos. 10, 11 



d Stipules quite small, subulate Nos. 1'.', 18 



C Leaflets lar-re (2 to a' by 1 to 2'), oblong-ovate. .Nos. 14, 15 



O Leaflets small, orbicula'r or oval ~ Nos. 1(>-13 



6 Leaflets long, linear, No. 19 . 



1 D. rotundifolium DC. St. prostrate, hairy ; If is. sulorlicular, hairy on both 

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

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



length, found iu rocky woods throughout the II. S." Lvs. of 3 roundish Ifts., palo 

 beneath, 1 to 2' diam., on hairy stalks. Stip. cordate, reflexed, hair}'. i"l& 

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



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

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

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

 Mass. (13igelo\v), Penn. (Muhl). A species much resembling tho 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. rmdiflorum DC. Lfts. roundish ovate. Ihtntly acuminate, slightly glaucous 

 beneath ; srape radical, panicled, smooth ; joints of tho loment obtusely triangu- 

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

 iug its loaves 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 of IKI-, slender, smooth, leafless, panicled, with many small, purple flowers, 

 Aug. 



