Order 46.— LEGUMINOSJE. 80V 



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

 lfts. 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. \ 



22. HEDYS'ARUM, L. (Gr. fjddg, sweet, dpwfia, 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-seeded joints connected by their middle. — 11 Mostly herbaceous. 

 Lvs. unequally pinnate. 



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

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

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

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

 reticulate. — On the precipitous sides of "Willoughby Mt, Westmorc, Yt. 500f 

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

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

 cles 3 to r o . Els. largo and handsome, violet-purple. Jn. — Jl. 



23. DESMfJDIUM, DC. (Hedysarum L.) Bush Trefoil. (Gr. 

 deafibc, 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 l), some- 

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

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

 mostly aculeate and adhesive. — 11 Herbaceous or stiff ruticous. Lvs. 

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



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



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



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



b Calyx teeth shorter than the tube Nos. 3 — 5 



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



— upper one entire No. 9 



§ Legumes snbsessile, the 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 (G to 9" Ion?), ovate-lanceolate Nos. 10, 11 



d Stipules quite small, subulate Nos. 12, 13 



6 Leaflets large (2 to 3' by 1 t« 2'), oblong-ovate. .Nos. 14, IB 



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



e Leaflets long, linear No. 19 



1 D. rotiiiidifdlinm. DC. St. prostrate, hairy ; lfts. 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 ki 

 length, found in rocky woods throughout the U. S. Lvs. of 3 roundish lfts., palo 

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

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



2 D. huHiifusum Beck. St. procumbent, striate, nearly smooth ; lfts. oval, sub- 

 piubescent ; stip. lance-ovate ; rac. axillary and terminal ; loment slightly cot> 

 stricieel 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, 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' hig'i, with several ternate, long-stalked, smoothish, terminal lvs. Scape 2 

 to 3f long, Blender, smooth, leafless, paniclod, with many small, purplo flowers. 

 Aug. 



