228 
LABIATE. 
divided lobes of the upper lip of the cor., inferior longest ; 
cells bursting longitudinally. Cor. with the upper lip deeply 
bifid: lobes elongate ; lower lip 3-lobed. Cal. tubular, 5- 
toothed, teeth equal or the upper one larger. 
19. Ajuga. Stam. parallel, protruding far beyond the upper 
lip of the cor., inferior longest ; cells bursting longitudinally. 
Cor. with the upper lip very short, 2-lobed ; lower 3-lobed, 
much longer than the upper. Cal. ovate-bellshaped, nearly 
equally 5-cleft. 
Tribe I. MenthoidecE. 
1. Mentha Linn. 
* Throat of the calyx naked. 
1. M. rotundifolia (L.) ; I. elliptic-obtuse sessile crenate-ser- 
rate shaggy beneath, spikes linear-cylindrical dense, bracts lan- 
ceolate.— E. B. 446. Sole Menth. Brit. 3. and 4. ? R. !— Cor. 
downy and grandular. Cal. hairy. Whorls of the spike nearly 
all close together. — (3. velutina ; 1. cordate-elliptical clasping ser- 
rate apiculate silky. M. velutina Lej. !, R. ! Leaves very large. 
— y. crispa ; 1. subsessile deeply cut and crisped, cor. very 
slightly downy externally. M. crispa (L.) E. B. S. 2785. — 
Waste ground in damp places, not very common, ji. Isle of 
Arran. S. y. Langley Ford in the Cheviot Hills. P. VIII. IX. 
Round-leaved Mint. E. I. 
2. M. sylvestris (L.) ; I. ovate or lanceolate acute sessile un- 
equally serrate hoary beneath, spikes linear-cylindrical dense, 
bracts subulate. — E. B. 686. Sole 1. and 2. — Cor. downy. Cal. 
woolly. Whorls of the spike nearly all close together. L. some- 
times not quite sessile, always acute, not apiculate, variable in 
form. — /3. Brittinaeri ; 1. ovate-lanceolate whitish-green above. 
M. Brittingeri Opitz ! — Waste ground in damp places. /3. New- 
ton Mead near Bath. P. VIII. IX. Horse Mint. E. 
3. M. viridis (L.) ; I. glabrous sessile lanceolate acute serrate, 
spikes lax cylindrical, bracts subulate. — E. B. 2424. Sole 5. — 
Cor. glabrous. Whorls of the spike rather distant. L. glandu- 
lar below. — /3. crispa (Benth.). — In marshy places, rare. /3. Glen 
Farg, Perthshire. Hooker. P. VIII. Spear Mint. 
4. M. pratensis (Sole) ; I. nearly sessile ovate-lanceolate acute 
serrate, floral I. similar the smaller ones longer than the whorls, 
whorls all distant subglobose, pedicels glabrous, cal. bellshaped : 
teeth hairy.— Sole 17. M. gentilis. Sole 15. E. B. 449. M. ru- 
bra Fries. M. gracilis y. Sm. — St. and 1. usually glabrous. L. 
paler beneath and glandular. Cal. glandular. — In marshy places, 
rare. P. VIII. IX. E. 
