30 ELEMENTS OP BOTANY. 



or less joined together below, — tlie corolla withering over 

 the fruit; stamens 10, diadelphous, the tube of joined filar 

 ments united below with the corolla ; pod generally not open- 

 ing, short and almost covered by the calyx. 



a. (T. pratbnse), Red 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), White 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 rgflexed 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. Pseudacacia), 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. 



III. 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 lip 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. 



6. (W. Sinensis), Chinese Wistaria. Racemes longer and 

 more drooping than in the Amerioah species ; appendage of the wing 

 petals occurring only on one side ; ovary downy. Cultivated from 

 China. 



