114 
Didynamia . 
Teucrium Scorodonia , Wood sage. Cor. with no 
upper-lip, but divided to the base ; stamens protrud- 
ed ; leaves heart-shaped, serrated, on foot-stalks, with 
lateral racemes ; the flowers on one side ; erect stem. 
Common in woods and heaths. 
Mentha. Gen. char.— -Corolla nearly equal, four- 
cleft, with the broader segment notched ; cal. five-cleft; 
stamens erect and distant. 
Of this genus, twelve species, with numerous varie- 
ties under most of them, are described as native plants. 
Men. Viridis, Spearmint ; has interrupted spikes ; 
leaves sessile, lanceolate, acute, naked ; bracteas brist- 
ly, and teeth of the calyx somewhat rough. 
Men. Piperita , Peppermint ; has obtuse spikes, in- 
terrupted at the lower part ; leaves subovate, smooth- 
ish, on foot-stalks ; base of the calyx very smooth. 
Both are natives, and grow in marshy and moist 
places, but are extensively cultivated for medical pur- 
poses. 
Lamium. Gen. char.— Cal. five-cleft, with bristly 
spreading teeth ; cor. upper-lip entire, arched, inferior, 
two-lobed, inflated, toothed on the margin on each 
side. 
Lam. Album 3 White Dead-nettle ; with heart-shap- 
ed, serrated, pointed leaves, on foot-stalks ; flowers in 
whorls. Very common in waste places about towns. 
Lam. Purpureum , Red Dead-nettle ; with heart- 
shaped, obtuse leaves, on foot-stalks ; upper leaves 
crowded together. Annual, and very common in waste 
places and cultivated grounds. 
