9fi ORDER 43. LEGUMINOS^K. 



45. WISTARIA, Nutt. Cal. bilabiate, upper lip emarginate, the lower 

 one 3 subequal teeth. Vex. with 2 callosities ascending the claw and 

 separating above. Wings and keel falcate, the former adhering at top. 

 Legume torulous. Seeds many, reniform. *> Leaves odd-pinnate. Ra- 

 ceme large, with large, colored bracts. Flowers lilac-purple. 



1 W. fruteseens DC. Pubescent when young, at length glabrous ; Ills. 9 13, ovate 



or elliptic-lanceolate, acute; raceme densely 00-flowered; calyx teeth obtuse; ovary 

 glabrous. Swamps, S. 15 30f. Woody. April, May. 



2 W. CONSBQUANA Benth. Pubescent; Ifts. 913, ovate or oblong-lanceolate, acumi 



nate ; raceme loose, pendulous, If long ; calyx teeth acuminate. China. April. 



46. APIOS, L. GROUND NUT. Calyx obscurely bilabiate, the upper 

 lip of 2 very short, rounded teeth, the 2 lateral teeth nearly obsolete, the 

 lower one acute and elongated. Keel falcate, pushing back the broad, 

 plicate vex. at top. ^ Glabrous. Root bearing edible tubers. Leaves 

 pinnately 5-7-foliate. 



t . tufoero.sa Ph. St. twining ; Ifts. ovate-lanceolate ; rac. shorter than the Ivs. Thick 

 ets and shady woods. 2 8f. Rac. 1 3' long. Fls. brownish-purple. Handsome. Jl.Aug. 



47. VIGNA, Savi. (To Dominic Vigna, commentator on Theophras- 

 tits.) Calyx of 4 lobes, the upper twice broader, the lower longer. Vex. 

 broad, with 2 callosities near the base of the limb. Keel not twisted. 

 Stigma lateral. Legume terete. ^ Leaves pinnately trifoliate. 



V. hlrsiita Feay. Plant hirsute, the stem retrorsely so; cal. with 1 bractlet at base, 

 segm. all acute, the lower acuminate ; Ifts. ovate-lanceolate, pointed. Marshes, S. Car. 

 Fla. to La. 6 lOf. Flowers pale yellow, 6". Pod 2', 4-6-seeded. July Sept. 



48. RHYNCHOSIA, DC. Calyx somewhat bilabiate, or 4-parted, witn 

 the upper segment 2-cleft. Vex. without callosities. Keel falcate. Style 

 glabrous. Legume oblique, short, compressed, 1-2-seeded. Seeds carun- 

 culate. U !? Leaves resinous-dotted beneath, pinnately 3-foliate, sometimes 

 reduced to a single leaflet Flowers yellow. 



PHASEoi-onrRE. Twining. Raceme long, CC-flowered. Calyx teeth short No. 1 

 ARCYPHFLLUM. Low, or twining. Flowers in fascicles or short racemes. 



Calyx teeth leafy, as long as the corolla Nos. 2, a 4 



ORTHODANUM. Erect. Pert. 1-flowert-d, axillary. Calyx teeth subulate No 5 



1 . R. minima DC. Scrambling ; Ifts. thin, rhomboidal ; rac. with about 12 remote, re- 

 flexed fls. ; pod torulous, 6" long. Banks, S. Car. to Fla and La. 3 5f, delicate. 



2 R. slmpllcifolla (Ell.) Low, erect, pubescent ; Ivs. reduced to a single leaflet, or- 



bicular or reniform. obtuse. Sandy woods, S. 1 3'. Leaves If. April, May. 



3 R. volubills Wood. Twining, pubescent ; Ivs. 3-fol. ; Ifts. oval or orbicular; rac. 



3-10-flwd. ; calyx teeth ovate, cuspidate. Dry woods, S. 3 4f. Lfts.l'. .Tune. July. 



4 R. er^cta Wood. Tall, velvety pubescent; Ivs. 3-foliate; Ifts. oval, acute; sepals 



scarcely nk/ted, lance-ovate to linear. Dry. Md. to Fla. 2 5f. June Aug. 



5 R. galactoides Chapm. St. erect, rigid, branched; Ifts. small, elliptic or oval, 



margins revolute ; ped. half as long as the flowers. Ala. Fla. 2 3f. 



49. PHASEOLUS, L. KIDNEY-BEAN. Cal. upper lip 2-toothed, lower 

 B-toothed. Keel with the stamens and style spirally twisted. Leg com- 



