KEY. 155 



Seeds kidney-shaped. Cotyledons thin. A shrubby vine. 

 Flowers large, lilac-purple, in dense racemes. 



Wistaria frutescens, D. C. 

 _ieave8 pinnately 3-foliolate (rarely of a single leaf- 

 let). Herbs 251 



351. Flowers purplish or white. Ovary several-ovuled. 



Leaflets usually stip6llate 252 



Flowers yellow, racemed or clustered. Ovary 1- 

 to 2-ovuled. Leaflets not stipellate, mostly roundish, rarely 

 a solitary one. Calyk slightly 2-lipped, or deeply 4- to 5- 

 parted. Herb downy, fthynchosia tom8htosa,Torr. & Gr. 



25S. Calyx 2-bracteolate 253 



Calyx not bracteolate, 4- or rarely 5-toothed. 

 Flowers of 2 sorts; the upper purplish, in clustered- or 

 branched axillary racemes, complete, but often barren ; the 

 lower near the base, and on creeping branches, apetalous, but 

 fruitful. Leaflets rhombic-ovate, stipellate. Bracts per- 

 sistent, round, partly clasping, and, like the stipules, striate. 

 Amphicarpsea monoica, Nutt. 



333. Standard with a short, spur-like projection at the 

 back, near the base. Calyx short, 5-cleft. Leaflets stipel- 

 late, oblong-ovate to oblong-linear. Peduncles 1- to 4-flow- 

 ered. Corolla 1 inch long, violet. Pod thickened at the 

 edges, pointed with the awl-shaped style. 



Centrosema Virginianumj Benth. 

 Standard not appendiculate 254 



334. Calyx 4-cleft, the upper lobe broadest. Leaflets 

 stipellate, oval, or ovate-oblong. Flowers in somewhat inter- 

 rupted, or knotty racemes, purplish. Galactia. 



Calyx 6-toothed. Standard much larger than the 

 other petals. Pod linear-oblong, flattish, knotty. Pedun- 

 cles 1- to 3-flowered. Corolla pale blue, 2 inches lonsj. 



Clitoria Mariana, L. 



333. Leaves palmately compound, 3- to 5-foliolate . . .256 



Leaves pinnately compound 237 



336. Calyx equally 5-cleft, the teeth bristle-form. Pod 

 1- to 6-seeded. Stamens more or less united with the corolla ; 

 anthers all perfect. Flowers capitate, whitish, purplish, 

 rose- colored, or yellow. Leaves 3-foliolate. Trifolium. 



