456 FABACEAE 



Tribe X. VICIEAE. 



Style filiform, hairy all around and below the apex; stamen-tube usually oblique at the 

 sumnut. ^ 42. ViciA. 



Style flattened towards the apex, hairy on the inner side; stamen-tube usually truncate 

 or nearly so. 43. Lathybus. 



Tribe XI, PHASEOLEAE. 

 Leaves 5-7-foliolate; style glabrous. 44. APIOS. 



Leaves 3-foliolate; style bearded along the inner side. 45*. Strophostyles. 



1. SOPHORA L, 



^ Trees or shrubs, or (ours) perennial herbs, with rootstocks. Leaves odd- 

 pinnate, with bristle-Hke stipules. Flowers perfect, in racemes. Calyx cam- 

 panulate, 5-Iobed. Petals clawed, white, yellow, or violet, nearly equal in 

 length; banner suborbicular, notched at the apex; keel 2-beaked at the apex, 

 btamens 10; filaments distinct or nearly so. Pod nearly terete, usually monili- 

 lorm, mdehiscent or tardily dehiscent. Seeds globose. 



u- u' m; ^®^*^®^ ^^^t*' Perennial, with a creeping rootstock; stem 1-3 dm. 

 high, silky-canescent, leafy; leaflets 15-23, elliptic or obovate, canescent; calyx 

 gibbous on the upper side; lobes lanceolate to triangular; corolla about 15 mm. 

 long, ochroleucous; keel with two subulate beaks; pod 3-5 cm. long, constricted ' 

 between Ihe seeds. Drj- prairies, plains, and hills: S.D.— Tex.— Ariz.— Wyo. 

 Flam — Submont. Ap-Je. 



2. THERMOPSIS R, Br. Yellow^ Pea, Golden Pea, Prairie Beait. 

 Perennial herbs, with creeping rootstocks. Leaves alternate, with foUaceous 

 niu^^l'^l^^.i^}^^ ^^^ P^^^^ leaflets. Flowers perfect, in racemes. 



) 



C.alyx campanulate, 5-lobed, the lobes nearly equal, or the upper two united 

 ^.orolla in ours yellow ; banner with a broad spreading blade and reflexed margins 

 keel as long as the wings or longer. Stamens 10, distinct; anthers nearly alike 

 i'od narrow, flat, 2-valved, many-seeded. 



Legume erect or ascending. 

 Fruit straight. 



^''^^v^''^^tlL%^^ """^ aippressed to the peduncle, densely pubescent. 



Ia?cPoiI7«^I? ascending; leaflets lance-oblong or (iblanceolate ; stipules 

 lanceolate oi oblong, more than twice as long as broad; raceme dense. 



Lea ves spreading ; leaflets rhombic-elliptic to elliptic-oblongVioweTstipSL at 



Raceme H v^ f.' J*""* ''I'^^ll' ^^^' ^^^^ ^^^e as long as broad. 

 Racpme ri.wi^^i'''^'' Straight. 2. r. oraia. 



raceme dense; legume somewhat curved. 4 T rvlorrhiza 



Legume ascending, sparingly pubescent; stipul^ broad; racemt^ew-flowered 



Fruit arcuate with spreading tips ^- ^- Vinetorum. 



LeiZil^o'^nl^^ln. 4. T. Tvlorrhiza. 



Legume strongly divaricate ?r reflexed : inflorescence short ^^ ^^ '''' «"'^'"'^"- 



Fnut reflextMl curved into half a circle or more ' °'^^"°*"- 



Leaves glabrous above. ., t' .h^ry^hiMin 



Leaves sflvery on both sides. 1; l' ^^Zul'JcTpa. 



snarinl; h'Jw f.^'fl ?^?« ^*f™ ^-^ ^m. high, slightly angled, glabrous or 

 iSorefcencP ™'t W ^ ' ^~^ Ti" ^^''^' S^^"°"^ ^^^^e- sparsely pubescent beneath; 

 H cm W ft T'- ^~n^-^ ^"^^ ^^'^g; '^«ro"a 15^20 mm long; pod linear 

 tS;r4^1'h' T.Cot-Lnr1.gT^- ''^^'^"" Mont.^Co^lo.-Utah 



above ■^ieaflpt?' rS'rl- ^n'?^"?"^ ^^^J?: Stem 3-7 dm. high, strict, branched 

 S^Ti^^s 1? L W "^^^*' o ^'. ^"'P 6-10 cm long/ glabrous; 



SarKlv vnio^. ^""^^'^f^ 2-2.5 cm. long; pod straight, about 6 ?m. long, 



Se^stSrH^- tS^I^^^-S^ ?^Si.^iSS:f ^-^Srl^S: 



