298 SUMMER FLOWERS. 



** Stems decumbent. 



S. arvensis : annual ; stems slender, hairy, branched, de- 

 cumbent or slightly ascending; leaves small, ovate, scarcely 

 cordate ; flowers small, of a pale purple, in loose, leafy spikes. 

 Fields and waste places. Fl. July, August. 



(228) Leonurns. MOTHERWORT. 



L. Cardiaca : stems stiff, hairy or downy, 2-4 feet high ; 

 leaves stalked, broad, palmately cut into 57 coarsely toothed 

 lobes, the floral leaves narrow, 3-lobed or entire; flowers in long 

 interrupted, terminal, leafy spikes, pink or nearly white. 

 Waste places, hedges, etc. Fl. July, August. 



(229) Ballota. BLACK HOREHOUND. 

 B. nigra : stems erect, hairy, branching, 2-3 feet high, 

 with a strong, disagreeable smell; leaves stalked, ovate or 

 cordate, coarsely toothed ; flowers in dense axillary clusters, 

 often slightly stalked, purplish, the lower lip 3-lobed, spread- 

 ing. Hedges and roadsides. Fl. July, August. 



(230) Scutellaria. SKULLCAP. 



S. galericulata : stems slightly branched, ascending, J-l 

 foot high; leaves ovate-lanceolate, slightly toothed; flowers 

 nearly sessile, opposite, in axillary pairs along the greater 

 part of the stem, and all turned to one side, the corolla dingy 

 blue, with a very slender tube considerably enlarged at the 

 throat. Wet, shady, or stony places. Fl. July, August. 



(231) Prunella. SELF-HEAL. 



P. vulgaris : stem procumbent, rooting at the base, with 

 ascending flowering branches, J-l foot high ; leaves stalked, 



