96 ORDER 43. LEGUMINOS^E. 



45. WISTARIA, Nutt. Cal. bilabiate, upper lip cmarginate, the low< r 

 one 3 subcqual 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. "b Leaves odd-pinnate. Ra- 

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



1 W. frutesceiis DC. Pubescent when young, at length glabrous; ll'ts. 913. ovate 

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

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



ft "W. CONSEQUANA Beiith. Pubescent : Ifts. 9 13, 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 

 Up 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. 



A. tnberosa Ph. St. twining; Ifts. ovate-lanceolate; rac. shorter than the Ivs. Thick- 

 ets and shady woods. 2 8f. Rac. 13' long. Fls. brownish-purple. Handsome. Jl.Ang. 



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

 tus.) 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. liirsiita Feay. Plant hirsute, the stem retrorsely so ; cal. with 1 bractlet at base , 

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

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



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

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

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

 culate. 11 ^ Leaves resinous-dotted beneath, pinnately 3-foliate, sometimes 

 reduced to a single leaflet. Flowers yellow. 



PHASEOLomRnB. Twining. Raceme long, GC-flowered. Calyx teeth short No. 1 

 ARCYPHTLLUM. Low. or twining. Flowers in fascicles or short racemes. 



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



ORTIIODANUM. Erect. Pcd. 1-fiowered, axillary. Calyx teeth subulate No. 5 



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



flexed fls. ; pod tornlous, G" long. Banks, S. Car. to Fla. and La. 3 of, delicate. 



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



bicular or reniform. obtuse. Sandy woods, S. 13'. Leaves H'. April, May. 



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



3-10-flwd. ; calyx teeth ovate, cuspidate. Dry wood?, S. 3 4f. Lfts. 1'. June, July. 



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



scarcely united, 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. FHAS&OLUS, L. KIDNEY-BEAN. Cal. upper lip 2-toothed, lower 

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



