PULSE FAMILY 133 



straight wings. Stamens diadelphous (9 and 1). Ovary and 

 pod somewhat stalked above the calyx, several-seeded. 



1. L. vulgare Griseb. Laburnum, Golden Chain. A small tree, 

 with smooth, gieenish bark. Leaves with slender petioles ; leaflets 

 oblong-ovate, acute at the base, taper-pointed, downy beneath. 

 Flowers showy, in graceful racemes. Cultivated from Europe. 



XI. CYTISUS L. 



Shrubs, rarely spiny. Leaves of 1-3 leaflets or none; stipules 

 very small. Calyx 2-lipped, the upper lip slightly 2-toothed, 

 the lower 3-toothed. K.eel straight or a little curved, blunt, 

 turned down after flowering. Stamens with their filaments 

 all united; anthers every other one short and attached b}- its 

 center, the alternate ones long and fastened by their bases. 

 Style curved in, or, after the flower opens, coiled up. Pod 

 flat, long, many-seeded. 



1. C. canariensis Dumont. A shrub with many rather stiff, erect, 

 slender branches. Leaves abundant, very small, covered with soft 

 gray hairs; leaflets 3, obovate. Flowers rather small, yello^^•, in 

 somewhat erect racemes. Cultivated in greenhouses. From the 

 Canary Islands. 



Xn. TRIFOLIUM L. 



Annual, biennial, or perennial herbs. Stems more or less 

 spreading. Leaves petioled, of 3 toothed or serrate leaflets ; 

 stipules united to the petioles. Flowers white, yellow, or red, 

 in heads. Calyx 6-cleft, the teeth nearly equal, awl-shaped. 

 Petals withering-persistent ; keel shorter than the wings. Sta- 

 mens diadelphous. Pod smooth, 1-6-seeded, scarcely opening.* 



1. T. arvense L. Rabbit Foot Clover, Stone Clover. Annual, 

 silky-downy, erect, branching, 5-10 in. high. Leaflets oblanceolate or 

 linear, minutely toothed above. Heads terminal, peduncled. Calyx 

 teeth very silky-hairy, longer than the whitish coroUa. Old fields, rail- 

 road embankments, and waste ground. Naturalized from Europe. 



2. T. incarnatum L. Crimson Clover. Annual. Stem erect, 

 somewhat branched, downy, 1-2 ft. high. Lower leaves long-petioled, 

 the upper short-petioled ; leaflets obovate or wedge-shaped, toothed at 

 the apex. Flowers bright crimson, sessile, in terminal heads which 

 finally become much elongated. Calyx silky, its lobes long and 

 plumose. Introduced from Europe and cultivated for fodder. 



