AUGUST. 343 
common on moist ground and waste places, and an exceed- 
ingly pretty species. The stems are erect and branched, 
one or two feet high, having long narrow leaves often spotted 
with dark marks. Spikes of rose-coloured flowers close to- 
gether, forming many pretty clusters. 
Potyconum Lavaruironium. Pale-flowered Persicaria. 
Frequent in fields and on way-sides. The spikes are oblong, 
and much lighter in colour than the last, pale green or almost 
white. The leaves larger, oval and long, with short stalks. 
Sometimes the main stalk is spotted. 
Potyconum Hypropiper. Biting Persicaria. This 1s 
distinguished by its many long, slender and drooping spikes 
of reddish flowers. Leaves long and narrow, waved, and 
unspotted. It is frequent by lakes and ditches, sometimes 
growing as high as three feet, but in most situations it is 
smaller. 
DIDYNAMIA, GYMNOSPERMIA. 
COROLLIFLOR®. LAMIACES,. 
MENTHA. (Mint.) 
Generic Character. Calyx equal, five-toothed, the mouth 
