ORDER XLIII. LEGUMINOS.E PEA-FAMILY. 



149 



idea. Stigma capitate Ovary stipitate. Legume flat, 2 i- 

 sceded. floaters of 2 kinds ; upper ones complete, but mostly bar- 

 ren ; those at the base of the item apetalous and productive. 



1. A. monoica. Wild Pea-vine. 



Stem slender, hairy, twining ; leaves pinnately trifoliate ; leaflets rhombic- 

 ovate, acute, smooth ; upper and perfect flowers nodding, in axillary raceme* 

 no longer than the leaves, purplish-white ; lower imperfect flowers on radical 

 peduncles ; cauline legumes 8 7 -seeded ; radical ones often beneath the sur- 

 face, 1-seeded. A very delicate vine in low woods and thickets. July Sep. 

 An. 



8. BOBlNIA. 



Calyx short, campanulate, 5-toothed ; 2 upper segments more 

 or less cohering, shorter. Banner large. Keel obtuse. Stamens 

 diadelphoug. Style bearded on the inside. Legume compressed, 

 many-seeded, nearly sessile. Trees and shrubs. 



1. R. pseudo-acacia. Locust Tree. 



Branches with stipular prickles ; prickles mostly 8 together ; leaves 9 19- 

 foliate ; leaflets ovate, or oblong-ovate, thin, mucronate, smooth, paler beneath ; 

 flowers large, white, numerous, fragrant, in axillary, pendulous racemes which 

 are 8' 6' long; legumes smooth. A beautiful tree with elegant foliage and 

 abundant showy flowers. Native of tho South and West, but naturalized In 

 N. England and N. York. Slay June. 



2. R. viscosa. Clammy Locust. 



Stipular spines very short ; branch loU, petioles and legumes glandular-viscid ; 

 leaves 11 15-foliate; leaflets ovate; flowers numerous, rose-color, without 

 fragrance, in crowded racemes. An ornamental Southern tree, common In 

 cultivation at the North. Mtty Jttnt. 



3. R. hispida. Hose-acacia. 



Stipular spinet scarcely any ; branches, calyx and legumes, hispid ; flowers 

 large, deep rose-color without fragrance, abundant. In loose and somewhat erect 

 racemes. A very ornamental shrub, 3 1 feet high. Native at tho South, 

 Very common In cnltl -at Ion. May. 



9. TEPHR&SIA. 



Calyx with 5 nearly equal teeth. Bracteoles none. Banner 

 large, round, spreading, or reflexed. Keel obtuse, cohering with 

 the wings. Stamens in 1 or 2 sets. Legume commonly sessile, 

 much compressed, many-seeded. Per. 



1. T. Virginians. Goafs Rue. 



Vlllons; stem simple, erect; leaves sub-sessile. 17 29-follatc ; leaflets ob- 

 long, more or less acute, mucronate, softly villons beneath ; racemes terminal, 

 3blong, nearly or quite sessile ; flowers large, pale yellow and purple ; legumes 

 falcate, vflloos. An exceedingly beautiful plant, growing in sandy soils. Not 

 very common, stems 18 feet high. July. 



10. TRIF6LI0M. 



< ':ilyx tubular, campannlate, 5-clcft, persistent. Petals more 



unitoii at base, withering. Banner larger than the wings, 



reflexed. Wings oblong, mostly longer than the keel. Legume 



small, membranaceous, indehiscent, included in, and scarcely 



ilian Ilie calyx, 2 1-seeded. Seeds sub-globose. Leaves 



trifoliate. Flowers in dense heads. 



1. T. repens. White Clover. 



Smooth ; stem creeping, spreading ; leaflet! obcordate, denticulate ; petioles 

 long, semi-terete ; stipules narrow-lanceolate, scarious ; heads globose, on long 

 Hillary, angular peduncles ; corollas white, becoming pale brown, very fragrant, 

 reflexed when past flowering ; calyx-teeth unequal, shorter than thetnbe; le- 

 gnme 4-seeded. A very common Clover In damp soils, flowering the entire 

 season. Per. 



2. T. arvense. RabUVs-foot Clover. 



Silky-pubescent; stem erect, branching; leaflets oblong-obovate, minutely 

 8-tiwthed at apex; petioles very short ; stipules ovate-lanceolate; flowers pale 

 red or whitish, In cylindrical, very hairy heads, calyx-teeth fringed with hairs 

 much longer than themselves. A small hairy plant, 8' S' high, not uncom- 

 mon In pastures and dry soils. July Aug. An. 



3. T. pratense. Red Clover. 

 Stems ,v.vi. pubescent; petioles pnbescent: leaflets 



ovate, nearly or quite entire, with n large, lighter-colored spot in the centre, 

 emarginate; stipules ovate-lanceolate, membranaceous, acuminate, strongly 

 nerved ; flowers red, never reflexed, In dense, short, fragrant heads. A common 

 and beautiful species, often cultivated for hay ; blooming all summer. Intro, 

 duced. Per. 



11. MELIL6TU9. 



Calyx tubular, persistent, 5-toothcd. Corolla deciduous. Ban- 

 ner longer than the wings. Keel-petals completely united, co- 

 hering with the wings. Style terminal, filiform. Stamens in 2 

 sets (9 and 1). Legume coriaceous, longer than the calyx 1 

 few seeded. 



1. M. officinalis. Yellow Mellilot Clover. 



Stem erect, branching, smooth ; leaves pinnately 8-foliate ; leaflets obovate* 

 oblong, obtuse, remotely serrate ; stipules setaceous ; flowers yellow, In loose, 

 axillary racemes, corolla twice as long as tho calyx ; legume ovate, 2-secded. 

 A very fragrant annual plant 2 3 feet high, found in alluvial soils. Introduced. 

 June Aug. 



2. M. leucantha. WJiite Mellilot Clover. 



Stem furrowed, smooth, branched ; leaflets ovate-oblong, truncate at apex, 

 remotely serrate; stipules setaceous; flowers white, in long, loose, axillary, ra- 

 cemes; corolla more than twice as long as the calyx ; legume ovate, 2-secded. 

 A fragrant plant, 24 feet high, much resembling the last, but easily distin- 

 guished by the color of the flowers, and longer racemes. Alluvial meadows, 

 also in waste places, and round old houses. Introduced. June Aug. Bien- 

 nial. 



12. MEDICAGO. 



Calyx 5-clcft, somewhat cylindric. Keel of the corolla re- 

 mote from the standard. Legume falcate, or- spirally coiled, 

 usually many-seeded. 



1. M. lupulina. None-such. 



Stem procumbent, angular, more or less pnbescent; leaves trifoliate ; leaflets 

 obovate, serrulate, mucronate ; stipules lanceolate, acute, nearly entire ; flowers 

 small, yellow, In small ovate heads, on slender, pubescent peduncles, longer 

 than the petioles ; legumes renifonn, 1 -seeded, rugose, A common plant in 

 fields and roadsides, with clover-like foliage, and yellow flowers. Introduced. 

 May Oct. Siennial. 



la DESM6DIUM. 



Calyx with 2 bracteolcs at base, bilabiate, 5-cIeft, Corolla 

 inserted on the calyx at tho base. Banner roundish. Keel obtuse. 

 Stamens diadelphons (9 and 1), sometimes monadelphous. Style 

 filiform. Stigma capitate. Legume (loment) compressed, com- 

 posed of several, 1-secded, separate joints. Leaves pinnately 

 trifoliate. Per. 



1. D. nudiflorum. Scape Trefoil 



Stem erect, leafy at summit; leaflets rhombic-ovate, acuminate, somewhat 

 glaucous beneath ; flowers smalt, in radical and scape-like, paniculate racemes, 

 purple; stamens monadelphous; legume with obtusely triangular joints. A 

 common and well marked species, distinguished by its radical scapes, which 

 are 12 ft high, with a long raceme of purple flowers. Woods. July Aug. 



2. D. acuminatum. Bush Trefoil. 



Stem erect, simple, pubescent, leafy at summit ; leaves long-petlolate ; leaf- 

 lets broad-ovate, terminal one rhomboldal, all conspicuously acuminate; 

 flowers small, pale purple, in a long, terminal, loose, raceme-like panicle, on a 

 very long, slender peduncle ; legumes with about 3 triangular Joints. Woods, 

 common. About a foot high, with a panicle 12 ft long. July Aug. 



3. D. Canadense. Canadian Trefoil. 



Stem erect,, brandling, hairy, striate ; leaves on short petioles ; leaflets ob- 

 long-lanceolate, netrly glabrous; stipules subulate; bracts ovate-lanceolate, 

 dilate, conspicuous ; flowers purple, In axillary and terminal racemes; legumo 

 3 B jointed ; joints obtusely triangular, hispid. A fine showy species In dry 

 woods, 2 I ft high. July. 



4. D. canescens. Hoary Trefoil. 



Stem erect, branching, hairy, striate, scabrous; leaflets ovate, more or less 

 Rente, scabrous, pubescent on both sides ; stipules large, ovate, oblique, cilinto, 

 finely striate, persistent; panicle terminal, very large, naked, densely can- 

 escent; bracts deciduous, ovate-lanceolate; flowers small, violet-purple, be- 

 coming greenlih when withering; laments with about 4 oblong. triangular, 



