Okdee 46.— LBGUMINOS^. 307 



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

 Ifts. 11 to 19, all subsessilo, 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 1' diam. Jl. — Sept. f 



22. HEDYS'ARUM, L. (Gr. riSvg, sweet, apwfia, smell.) Calyx 

 cleft 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-scedod joints connected by their middle. — "H Mostly herbaceous. 

 Lvs. unequally pinnate. 



H. boreale Nutt. Sts. erect ; lvs. subsessile, of 6 to 10 pairs of oblong, smoolh- 

 ish 1ft?. ; stip. united, sheathing, with subulate points ; rae. spioate, 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 WiUoughby Mt., "Westmore, Tt. 500f 

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

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

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



23. DESMO'DIUM, DC. (Hodysarum L.) Bush Trefoil. (Gr. 

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

 loment.) Calyx 5-cleft, bilabiate, sometimes bibraoteolate 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 suflfruticous. Lvs. 

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



§ Legumes distinctly stiped, the stipes about as lon^ ns the joints (a). 



a Steins prostrate, cret^ping. Lfts. round or oval Nos. 1, 2 



a Steins erect. Lfts. ovate, broadly or (in No. 6) narrowly, (b). 



b Calyx teeth shorter than the tube Nos. S — 5 



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



— upper one entire No. 9 



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

 c Bracts lari^e, covering the flower buds, caducous (d). 

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



d Stipules lar^e (6 to 9'' long), ovate-lanceolate Nos. 10, 11 



d Stipules quite small, subulate Nos. 12, 13 



6 Leiiflets Large (2 to 8' by 1 to 2'), oblong-ovate. .Nos. 14, 15 



e Leaflets small, orbicular or oval Nos. 16 — 18 



6 Leaflets long, linear No. 19 



1 D. rotundifolium DC. St. prostrate, hairy ; lfts. suborbicular, hairy on both 

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

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

 length, found in rocky woods throughout the TJ. S. Lvs. of 3 roundish lfts., 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. humifiisuin Beck. St. procumbent, striate, nearly smooth ; Ifis. oval, sub- 

 pubesoent ; stip. lance-ovate ; rae. axillary and terminal ; loment slightly con- 

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

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

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

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



3 D. nudiflorum DC. Lfts. rovmdish ovate, bluntly acuminate, slightly glaucous 

 beneath ; scape radical, panicled, 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' higli, with several temate, long-stalked, smoothish, terminal lvs. Scape 2 

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

 Aug. 



