127 
II Powers. Seeds naked. Did. Gymn. 
423. Common Vervain, — - V. officinalis. 
Spikes thread-shaped, panicled, leaves jag- 
ged, with many divisions, stem solitary. — 
Curtis. I.. 41. Woodville. 218. Hoffman. 
Ger. Flo. 2. 
Road-sides, July, P. Common. 
Mint, Mentha. Gen. PI. 967. 
Blossom nearly equal, 4 segments, 1 segment 
nicked. Threads upright, distant. 
424. Rough Water Mint, — M. hirsuta. 
Flowers in heads, leaves ovate, serrated, near- 
ly sitting, dov/ny, threads longer than the 
blossom. — Ray. X. i. Sowerby. 447. 
Watery Places, August, P. Common. 
425. Smooth Water Mint, — M. aquatica. 
Leaves egg-shaped, serrated on leafstalks, 
threads longer than the blossom. — Petiver. 
XXXI. 6. 
Watery Places, August ?. Rare. 
Oakley, 
426. Field Mint, — M. arvensis. 
Flowers in whorls, leaves ovate, pointed, ser- 
rated, threads even with the blossom. — 
Flora Danica. 512. 
Wet Places, July, P. Common. 
G round 
