LABIATE. 287 



Corolla almost equally 4-lobed, small, hardly irregular, but upper lobe 

 often broadest and emarginate. StamenB 4, similar, nearly equal, not 

 declined. 



* Old World species; inflorescence terminal. 



1. M. vibidis, L. Herbage green, nearly glabrous: stems erect, 2 — 4 

 ft. high: leaves subsessile, oblong-lanceolate, sparsely and sharply serrate, 

 somewhat rugose-veiny : flower-clusters crowded in narrow leafless terminal 

 spikes: calyx oblong-campanulate; teeth triangular-subulate, as long as 

 the tube: corolla very pale purplish, glabrous. — Naturalized abundantly 

 along streamlets and on moist banks. 



2. M. pipbbita, Huds. Tall as the preceding, but the herbage dark 

 or reddish-green, with a very pungent flavor: leaves ovate-oblong or 

 oblong-lanceolate, acute, distinctly petiolate; spikes narrow but inter- 

 rupted. — As common as the last, or even more so. 



3. M. citbata, Ehrh. Aspect of the preceding, but leaves more 

 rounded, thinner, with a comparatively delicate sweet ordor: flower- 

 clusters a subglobose terminal head, with a few verticillasters beneath 

 it. — By a streamlet near West Berkeley. 



* * Flower-clusters in the leaf-axils; one species native. 



4. M. Pulegittm, L. Almost hoary with a short white-woolly pubes- 

 cence: stems 1 — 2 ft. long, reclining or prostrate and rooting at the 

 lower joints, the young sterile shoots above ground (not subterranean 

 and shizomatous): leaves elliptic-ovate, short-petiolate, }£— 1 in. long, 

 remotely denticulate-serrate; dense cymes globular, smaller (and the 

 leaves smaller) towards the ends of the branches: calyx broad-funnel- 

 form, slightly bilabiate : teeth lanceolate-acuminate, half as long as the 

 tube, 10-ribbed, the throat closed with hairs. — Wet banks of streams, 

 above Santa Bosa, and islands of the lower San Joaquin. 



5. M. Canadensis, L. From nearly glabrous to villo as-hoary, 1 — 2% 

 ft. high: leaves oblong-ovate to oblong-lanceolate, acute, sharply serrate, 

 tapering to the short petiole: calyx hairy: teeth triangular-subulate, half 

 the length of the oylindraceous tube : corolla from white to pale laven- 

 der-color.— Frequent in marshes about the Bay, and along river banks. 



3. LTCOPUS, Town. Herbs with the habit of the mints of our 

 second or indigenous group; but herbage wholly scentless and rather 

 intensely bitter. Leaves often deeply sinuate-toothed. Oalyx campan- 

 ulate, 4 — 5-toothed. Corolla with upper lip entire. Fertile stamens 2 

 only. Nutlets somewhat 3-sided, with thickened margins at the summit. 



1. L. lucidus, Turcz. var. Americanus, Gray. Stoloniferous at 

 base of the stem, 1—3 ft. high; stem sharply quadrangular toward the 

 summit: leaves 2—4 in. long, lanceolate, acute or acuminate, sharply and 

 coarsely serrate, almost sessile, glabrous or nearly so: calyx- teeth slen- 



