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 Cuain. A small tree, 
with smooth, greenish 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. Keel straight or a little curved, blunt, 
turned down after flowering. Stamens with their filaments 
all united; anthers every other one short and attached by 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, yellow, in 
somewhat erect racemes. Cultivated in greenhouses. From the 
Canary Islands. 
XII. 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 5-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. Raspit 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 corolla. 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. 
