232 XLVII. LEGUMINOS^. DESMODIUM. 



cies than either of the preceding, found in woods, U. S. and Can. Stem branch- 

 ing, erect, 4 5f high. Leaflets 3' long, widest at base, smooth, entire, pointed. 

 Stipules of the leaves ovate, long-acuminate, of the leaflets awl-shaped. Flow- 

 ers large, purple, with conspicuous bracts. Pods in about six joints, long, pen- 

 dulous, rough. Aug. 



8. D. MARILANDICUM. Boott. (D.obtusum. DC. H. Marilandicum. Linn.') 

 Plant erect, branching, hairy ; Ifts. ovate, obtuse, subcordate at base ; 



stip. subulate ; panicle terminal ; joints of the loment roundish, reticulate, hispid. 

 Woods, N. States to Flor. Stem 2 3f high. Leaflets 1'long, f as wide. 

 Flowers violet-purple, small. Loment 1 3-jointed. Aug. 



9. D. CILIARE. DC. (H. ciliare. Willd.) Fringed Desmodium. 



Plant erect, slender, subpubescent ; Ivs. crowded, on short, hairy petioles ; 

 Ifts. small, ovate, short-stalked, pubescent beneath, ciliate on the margin ; slip. 

 filiform, caducous ; -panicle terminal, the lower branches much longer ; joints 

 of the loment 2 or 3, half-orbicular, hispid, reticulate. Woods, N. Eng. to La. 

 Height 2f. Flowers purple. Aug. 



10. D. RIGIDUM. DC. (H. rigidum. Ell.} 



Erect, branching, rough-pubescent ; Ifts. ovate-oblong, obtuse, terminal 

 one the longest; petiole short, hairy; stip. acuminate, ciliate, caducous; roc. 

 paniculate, very long; leg. with 2 3 semi-oval or semi-obovate joints. Hills 

 and woods, Mass, to La. Stem 2 3f high, often with numerous, long, erect, 

 rigid branches. Leaflets 1 3' long, as wide, rather coriaceous, reticulately 

 veined. Flowers violet-purple. Aug. 



11. D. PANICULATUM. DC. (H. paniculatum. Linn.) 



Plant erect, smooth; Ifts. thin, oblong-lanceolate; stip. subulate; panicle 

 terminal, with long and slender pedicels ; bracts lanceolate ; joints of the loment 

 rhomboidal. A handsome species, near 3f in height, found in woods, U. S. and 

 Can. Stem slender, striate. Leaves of 3, smooth, narrow leaflets, broadest at 

 the base, tapering to an obtuse point, about 3' in length, with subulate, decidu- 

 ous bracts. Pods 4 5 jointed, large. Flowers purple, numerous. Jl. Aug. 



12. D. ROTUNDIFOLIUM. DC. (H. rotundifolium. Linn.) 



St. prostrate, hairy; Ifts. suborbicular, hairy on both sides; bracts broadly 

 ovate, acuminate ; rac. few-flowered ; joints of the loment subrhomboidal. A 

 hairy, prostrate plant, 2 3f in length, found in rocky woods throughout the 

 U. S. Leaves of 3 roundish leaflets, pale beneath, 1 2' diam., on hairy stalks. 

 Stipules cordate, reflexed, hairy. Flowers purple, in axillary and terminal 

 racemes. Pods about 6-jointed. Aug. 



13. D. HUMIFUSUM. Beck. (H. humifusum. MM.} Prostrate Desmodium. 

 St. procumbent, striate, nearly smooth ; Ifts. oval, sub-pubescent ; stip. 



persistent; rac. axillary and terminal; leg. of 24 obtusely 4-angled joints. 

 Woods, Waltham, Mass. Bigclow, Penn. Muhl. A species much resembling 

 the last, but the whole plant is much smoother, with smaller and narrower 

 bracts. Stem 2 3f long. Leaflets oval or ovate, subacute. Aug. 



14. D. VIRIDIFLORUM. Beck. (Hedys. virid. Linn.} 



St. erect, densely pubescent and scabrous above ; Ifts. ovate, mostly ob- 

 tuse, scabrous above, softly villous beneath ; stip. ovate-lanceolate, acuminate, 

 caducous ; panicle very long, leafless ; cal. very hairy, upper lip bifid ; leg. of 3 4 

 triangular joints. Alluvial soils, N. Y. to Flor. and La. Stem 3 -4f high, 

 rigid, branched. Leaflets 2 3' long. Corolla violet, turning green in withering. 

 Legume 1 2' long. 



15. D. L^VIGATUM 1 DC. (H. laevigatum. Nutt.) 



Glabrous ; st. simple, erect ; Ivs. on long petioles ; Ifts. ovate or oblong- 

 ovate, rather obtuse; stip. subulate, minute and deciduous; panicle terminal, 

 nearly simple \ fls. in pairs, on elongated pefficels ; bracts ovate, very small ; 



long, f If wide. Pedicels 5 S" long. Flowers purple. Sept. My speci- 

 mens, as well as those of Nuttall. are without fruit. 



