SPECIES AND VARIETIES. 297 



coarsely toothed ; flowers purple, in dense whorls in the upper 

 axils, the upper ones forming a terminal head. Cultivated 

 and waste places. Fl. August, September. 

 ** Calyx-teeth long and almost prickly. 



G-. Tetrahit : annual ; stems coarse, 1-2 feet high, swollen 

 under the nodes, with spreading branches, and stiff, spreading 

 hairs ; leaves ovate, pointed, coarsely toothed ; flowers nume- 

 rous, forming close whorls in the axils of the upper leaves, 

 pale-purplish or white. Cultivated and waste places. Fl. 

 July, August. 



Var. versicolor, larger, with larger flowers, which are yellow 

 with a purple spot on the lower lip. Fields. 



(227) Stachys. WOUNDWORT. 



* Stems erect. 



S. Betonica : stems 1-2 feet high, dow r ny or hairy ; leaves 

 mostly radical, oblong, cordate at the base, coarsely crenate, 

 the upper ones few, distant, sessile ; flowers purple, in dense 

 whorls, collected in a close terminal, oblong head or spike ; 

 the upper lip of the corolla ovate, erect, slightly concave. 

 Betony. Woods and thickets. Fl. July, August. It is 

 sometimes called Betonica. 



S. sylvatica : stem stoat, erect, branching, 2-4 feet high, 

 coarsely hairy; leaves all stalked, cordate, ovate, crenate; 

 flowers in distant whorls, forming long terminal spikes, dark 

 reddish-purple, the lower lip variegated with white. Shady 

 banks, and edges of woods. Fl. July, August. 



S. palustris : stems tall, stout, with short hairs ; leaves 

 oblong or lanceolate, slightly cordate at the base ; flowers pale 

 bluish-purple, forming shorter and more crowded spikes than 

 in the last. Ditches, and moist banks. Fl. August. 



