DIDYNAMIA— GYMNOSPERMIA. Mentha. 87 



M. aquatica. Raii Sij7i. ed. 1 . 78, 



M. sen Calamintha aquatica. Rail Syn. ed. 2. 1 23. ed. 3. 232. 



M. arvensis humilior verticillata hirsuta. Moris, v. 3. 369. sect. 1 I . 



t. 7.f. 5. 

 Calamintha aquatica. How Phyt.\8. Merr. Pbi. 18. Ger. Em. 



684./. B'latth. Valgr. v. 2. 7S. f. Camer. Epit. 483./. 

 Water Wliirl Mint. Pet. H. BrU. t. 3 1 ./. 5. 

 /3. Mentha arvensis major, verticillis etfloribus amplis, foliis latio- 



ribus, staminibus corolla longioribus, odore grato. Sole Mentli. 



29,7. 

 y. M. praecox. Sole Menth. 31. t. 13. Htill ed. I. 128. 

 S. M. gentili.s. Mill. Diet. ed. 8. 7i. 15. From the author's herb. 

 M. verticillata, rotundiore folio, odore Ocymi. >S. Dale Ms. 

 M. verticillata glabra, foliis ex rotunditate aciiminati.s ; Buddie. 



In his own, as well as Bobart's, herbarium. 

 M, arvensis verticillata, folio rotundiore, odore aromatico ; Vernon. 



Raii Syn. ed. 2. 123. ed.3. 232. 



In sandy corn-fields frequent, especially where water has stagnated. 



/3. In moist meadows. Mr. Sole. 



y. On the banks of rivers. Mr. Sole. 



$. On the right hand of the road from Docking to Gossfield, Essex. 

 Dale. Found by Mr. Wigmores at Shelford, Cambridgeshire. 

 Ray. In Prestwick Car, Northumberland. Mr. PViuch. 



Perennial. June — September. 



Root creeping extensively. Herb of a pale hoary green, more or 

 less hairy, with a strong unpleasant odour, like cheese covered 

 with blue mould. Haller calls it detestable. Stem generally 

 weighed down with its numerous branches ; in y more upright. 

 Leaves stalked, ovate, or somewhat elliptical, bluntishj variously 

 serrated, tolerably even, not wrinkled or rugged. Whorls of 

 numerous, nearly sessile _^oii)er£. Flower-stalks simple, round, 

 purplish at the upper part, often quite smooth, sometimes va- 

 riously hairy, the hairs scattered, slightly reflexed, always most 

 abundant near the top, or crowded under the calyx, as is 

 common in this genus. Bracteas lanceolate, small ; hairy be- 

 neath. Calyx short, bell-shaped, slightly furrowed, covered with 

 resinous dots, and with longish, horizontally spreading, hairs. 

 Cor. pale blueish purple, externally hairy. Stam. prominent in 

 general, but not invariably ; in y and $ short. 



The peculiarly short bell-shaped calyx, with its horizontal hairs, 

 clearly distinguish this species from all the foregoing. 



jS is a larger more upright variety, with a sweetish smell, y, the 

 prcrcox of Sole, is also erect, with elliptical leaves, more shining 

 and less evidently hairy ; 5 has the odour of Sweet Basil, which 

 Mr. S. Dale's old original specimens still retain. In shape and 

 characters it nearlv agrees with the common kind. Jacquin's 

 M. austriaca, Fl. Austr. t. 430, looks like a starved plant of Mr. 

 Sole's prcecox, my y, but nothing certain can be made out from 



