592 LABIAT.E. I^jcojHis. 



Border of streams ami s|iriiigs, San Francisco Bay and eastward to Nevada, &c. Extemls 

 uorthwurd to riigcl Sound, and cast to the Atlantic. 



M. rii'KitiTA, Liiiii., tilt! rtiiiK'indnt, wldcli is glabrous, the leaves pctioled, and the llowcrs 

 crowded iu a tcrnunal sjiikc, is proinibly in cultivation, and theret'oro likely to bo naturalized. 



M. viuiKis, liinn., tlio S|icarniint, like the lust, but with veiny leas smooth and sessile leaves, 

 jnobabiy in huge demand lur juli'iis, is sure to be naturalized bel'oro long. 



3. LYCOPUS, Tourn. Wateu Hokkhounu. 



Like Mentha, but the posterior p;iir of stamens ^Vantillg or sterile. Calyx in the 

 same species either 5-toothed or 4-tootheJ. Corolla apparently regular, being about 

 equally 4-lobed. Nutlets with thickened margins at the top. Flowers white or 

 nearly so, in close sessile whorl-like clusters in the axils of the leaves. — A genus 

 of few species, widely dispei-sed. — Cray, Proc. Am. Acad. viii. 285, 



1. L. sinuatus. Ell. Not stoloniferous nor tuberiferous, but with rootstocks 

 more or less creeping, glabrous or minutely roughish-jjubescent, a foot or two high, 

 loosely branching : leaves oblong or lanceolate, acuminate, laciniate-pinnatitid or 

 irregularly incised, or merely sinuate, petioled : outer bracts barely equalling the 

 ilowers : calyx-teeth triangular-subulate and cuspidate, rigid, nearly equalling the 

 corolla, in fruit .surpas.sing the iiutlids : ruilimenta of sterile stamens sli^iuler and 

 with a IhickoniHl tip. 



Wet groumls ; rare in the northern part of the State, not uncommon iu Oregon, extending 

 through the Atlantic Stales. 



2. L. lucidus, Turcz., var. Americanus, Gray, 1. c. Somewhat stoloniferous 

 from the base of the stem, and with stouter subterranean runners producing large 

 tubers, nearly glabrous, or usually puberulent-hirsute : stem stout and strictly 

 erect, 2 or 3 feet high, very leafy, acutely angled towards the sunmiit : leaves lan- 

 ceolate (2 to 4 inclies long), acute or acuminate, sharply and coarsely serrate with 

 ascending teetli, sessile or nearly so : subulate outermost bracts as long as the 

 Ilowers : calyx-teeth slender-subulate, equalling the corolla, not exceeding the nut- 

 lets : rudiments of sterile stamens slender and with a thickened tip. 



l-ow grounds near Sun Kraneiscu (A'<;/%.(/, &c.): also from Arizona and Now Mexico to Sas- 

 katchewan. Foliage not at all lucid us in the Siberian plant. 



L. ViKGiNieus, Linn., in a large-leaved form (L. oiutcrophyllus, Benth. ) occurs in Oregon and 

 eastward. It may be known by the abundance of liliform runners produced during the summer, 

 and the pointless calyx-teeth, which are mostly 4, while 5 hugely prevails in the other species. 

 An unusual bitterness gave tliis plant a certain repute in medicuie, but it is of no account. 



4. PYCNANTHEMUM, Michx. 



Calyx ovate-oblong or short-tubular, ours with 5 short equal teeth ; the throat 

 naked within. Corolla short, with tube hardly exceeding the calyx, and a distinctly 

 2-lipped border ; both lips nearly Hat ; the upper entire or nearly so and rather 

 erect ; the lower spreading and 3-cloft into short and obtuse lobes. Stamens 4, 

 straight, distant and divergent ; the anterior pair slightly longer : anther-cells close 

 and parallel. — Perennial erect herbs, with densely-crowded flowers (whence the 

 name); consisting of IG species of the Atlantic United States, and one in California. 



1. P. Californicum, Torr. About 2 feet high, corymbosely branched, sweet- 

 odorous, wliitenud with a fine and soft close })ubescence, or in age sometimes 

 smootliish and greener : leaves from ovate to ovate-lanceolate, closely sessile by a 

 roundish or slightly cordate base, si)aringly denticulate or entire (1 to 3 inches 

 long) : heads of flowers very dense at summit and in 2 or 3 upper pairs of axils, 

 compacted Avith slender bracts, white-villuus : flowers whitish. — Pacif. It. Pep. 

 iv. 122. 



