30 ELEMENTS OF BOTANY. 
or less joined together below,—the corolla withering over 
the fruit; stamens 10, diadelphous, the tube of joined fila- 
ments united below with the corolla ; pod generally not open- 
ing, short and almost covered by the calyx. 
a. (T. PRATENSE), Rep CLover. ° Stems ascending, somewhat 
hairy ; leaflets oval or obovate, sometimes notched at the tip, usually 
with a pale spot on the upper surface; heads sessile, dense, with 
many rose-red, sweet-scented flowers. Perennial. Cultivated from 
Europe, also becoming wild. 
b. (T. REPENS), WuiTE CLover. Stems smooth, creeping and 
rooting at the joints ; leaves small, long-petioled, with inversely heart- 
shaped leaflets ; heads globular, loose, long-peduncled, with whitish 
flowers, the pedicels reflexed in fruit. Perennial. 
II. ROBINIA, LOCUST. 
Trees or shrubs. Leaves pinnately compound (Fig. 76), 
often furnished with persistent spiny stipules (Fig. 188), the 
leaflets with stipels. Flowers showy and fragrant, in axillary 
racemes. Calyx 5-cleft. Corolla decidedly papilionaceous, 
with a large standard. Stamens diadelphous. Style bearded 
inside. Pod rather long, much flattened, containing many 
hard, shining, flattish seeds. 
(R. Pseupacacia), Common Locust. A tree 30-80 ft. high, 
with rather coarse-grained wood, very durable in the ground for 
posts, &c., and spiny branches; racemes of large fragrant white 
flowers, rather long and loose. 
Ill. WISTARIA. 
High-climbing shrubs, with odd-pinnate leaves of many 
leaflets and large, showy, lilac-purple flowers in long, droop- 
ing racemes. Calyx two-lipped, the upper hp merely notched, 
the lower with 3 nearly equal teeth. Standard large and 
roundish. Pod knobbed, containing many kidney-shaped seeds. 
a. (W. FRUTESCENS), AMERICAN WisTarIA. Racemes rather 
dense ; wing petals, each with one short and one long appendage at 
the base ; ovary smooth. 
b. (W. SINENSIS), CHINESE WisTARIA. Racemes longer and 
more drooping than in the American species ; appendage of the wing 
petals occurring only on one side; ovary downy. Cultivated from 
China. 
