ON THE ENGLISH MINTS. 239 
amples doubtful between this and the preceding," like the specimen 
marked rotandlfolia \\\ the Liniiseau herbarium, il/. cm/Ja, of Lamarck 
and Clievallier, seems to be a form oi rotundifolia with contorto-crisped 
and acutely-toothed leaves, and M, undulata of "Willdenow, a similar 
form of xT/. sylvestris^ but I am not acquainted with either as British- 
Ill, M, viridis, Linn., Smith; Sole, t. 5; Boreau, 1918; Wirtgen, 
fasc. n. 1. Jf. syhestrk (jlabra,}LoQ\ Synopsis^ ed.iii, p. 476 ; Eeichen- 
bach, IcoueSj 12S4, fig. 1. 
Stem 2-3 feet liigh, erect, branched below with short erecto-patent 
branches when luxmnant, fmUj quadrangular, naked or slightly hairy 
beneath the nodes, often brightly tinged with purple. Leaves sessile 
or the lower ones slightly stalked, lanceolate or ovate-lanceolate, 
rounded or even cordate at the base, dark green and glabrous above, 
paler and prominently veined with green or purple beneath, rather 
thickly glandular, but either quite naked or hairy only on the midrib 
and principal veins, the point narrowed out and acute, the teeth 
sharp but neither veiy close nor deep, the lowest measuring about 1 
inch across by 3 or 4 inches long. Inflorescence a panicled arrange- 
ment of spikes, of which the main one is 3 or 4 inches long by f inch 
wide, the lowest whorls sometimes \ inch from each other, and the 
lowest bracts leafy, Bractcoles linear-subulate, equalling or exceeding 
the expanded flowers, smooth or slightly cihated. Pedicels about v 
line long, purplish glandular, but never hairy. Calyx also often pur- 
plish, the tube campanulato-cylindrical, f line long, the teeth lanceo- 
late-subulate, equalling the tube, the lower part of which is naked, but 
the teeth and often the upper part clothed more or less densely with 
erecto-patent hairs. Corolla reddish-purple, about twice as long as 
the calyx, naked both within and without. Nut smooth. Scent strong 
and aromatic. 
This varies slightly in the shape of the leaves, the elongation of the 
spike, and the hairiness of the upper part of the calyx, but upon the 
whole seems to be as distinctly marked as any of our species. It most 
resembles M. piperita officinalis^ wliich may be distinguished by its 
stalked leaves and much larger flowers. Between M. viridis on the 
one hand and M, sylveslris and rotundifolia on the other, the line of 
separation with us is clear, but upon the Continent is bridged over by 
various intermediate forms, of which if. amaurophylla and Nouletiana 
of Timbal-Lagrave are two, I believe it to be a true native in some 
