DESCRIPTION OF MEDICINAL PLANTS. 
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somewhat 2-lipped, the tube with a bearded ring within; 
the 4 upper lobes nearly equal, but the lower much larger 
and longer, pendent, toothed or lacerate-fringed. Corolla 
lemon- yellow, lemon-scented, 5-6" long. Upper pair of 
stamens shorter, much exserted, diverging. liich wood- 
lands, especially in the mountains. FI. July. The root is 
collected in fall. 
Collinsonia verticillata, Baldw. Smaller than the former. Stem 
1° high, leafless and glabrous below, at summit bearing two 
approximate pairs or a seeming whorl of thin and large 3-7' 
long ovate, coarsely serrate and glabrous leaves; peduncle 
mostly simple and slender, viscid pubescent, supporting a 
single raceme; bracts minute; lower pedicels often in pairs 
or threes; calyx teeth all attenuate-subulate; corolla yel- 
lowish or purplish. FI. in May. Hills south of Nashville. 
To be used in place of former. 
Mentha viridis, L. Spearmint. Odorous perennial herb, spread- 
ing by slender creeping rootstocks, with terminal inflores- 
cence and the densely capitate glomerules all much crowded 
in the leafless narrow spikes. Glabrous or nearly so; leaves 
opposite, oblong-lanceolate or oblong, sparcely and sharply 
serrate ; bracts linear-lanceolate and subulate, conspicuous. 
Corolla 2-labiate didynamous, stamens not declined, similar 
and nearly equal. Calyx campanulate or short-tubular and 5- 
lobed. In wet ground around settlements. Originally in- 
troduced from Europe and cultivated, but now naturalized 
and ubiquitous. The herb is collected. 
Mentha piperita, L. Peppermint. Closely resembling the 
former in the more important particulars, but glabrous, very 
pungent tasted; leaves ovate-oblong to oblong-lanceolate, 
acute, sharply serrate; spikes interrupted, leafless, narrow, of 
numerous glomerules, or some in the axils of the upper leaves ; 
flowers distinctly pedicellate ; leaves distinctly petioled, 
stemless, erect. In wet places and in water; escaped from cul- 
tivation but fully naturalized and abundant in same situa- 
tions as the former. FI. July-September. Collect the herb- 
