LABIATE. (MINT FAMILY.) 295 



in the middle, acuminate at both ends, tapering into a short petiole : bracts very 

 short : calyx-teeth ovate or lanceolate-ovate, obtuse or barely acutish : sterile 

 stamens minute rudiments. From British Columbia and Oregon to Florida 

 and Labrador. 



2. I*, lucidus, Turcz. Stem strict, stout, 2 or 3 feet high, hirsute-pubes- 

 cent or glabrate, acutely angled above : leaves lanceolate and oblong-lanceolate, 

 2 to 4 inches long, acute or acuminate, very sharply and coarsely serrate with 

 triangular-subulate ascending teeth, sessile or nearly so by an obtuse or acute base, 

 coarsely punctate : outer bracts conspicuous, very acute : calyx-teeth attenuate- 

 subulate : sterile stamens clavate-tipped rudiments. 



Var. Americanus, Gray. Leaves dull, often minutely puberulent both 

 sides : calyx-teeth less rigid. Bot. Calif, i. 592. From the Saskatchewan to 

 Arizona and California. 



* * Not stoloniferous, but rootstocks more or less creeping : calyx-teeth 5, cuspidate, 



rigid. 



3. L. SinuatUS, Ell. Stem erect, 1 to 3 feet high, acutely 4-angled, gla- 

 brous, roughish or minutely pubescent: leaves oblong or lanceolate, \\ or 2 

 inches long, acuminate, irregularly incised or laciniate-pinnatifid, or some of 

 the upper merely sinuate or iucisely toothed, tapering at base mostly into a 

 slender petiole: rudiments of sterile stamens slender, conspicuous, with a 

 globular or subclavate tip. L. Europceus, var. sinuatus, Gray. Across the 

 continent. 



4. PYCNANTHEMUM, Michx. MOUNTAIN MINT. BASIL. 



Erect herbs, pleasantly aromatic, branching above ; flowers small, whitish 

 or purplish, often purple-dotted. In ours the flowers are in small and numer- 

 ous glomerules which are capitate and densely fastigiate-cymose, copiously 

 imbricated with short appressed bracts. 



1. P. lanceolatum, Pursh. Stem somewhat pubescent: inflorescence 

 villous-canescent : leaves lanceolate or almost linear, nervose-veined, obtuse at 

 base, nearly sessile, entire : bracts ovate or lanceolate : calyx-teeth ovate- 

 deltoid, acute. Within the eastern limit of our range, and extending from 

 thence eastward across the continent. 



6. MONABDBLLA, Benth. 



Flowers in terminal and solitary verticillastrate heads, subtended or in- 

 volucrate by broad often membranaceous and colored bracts : corolla from 

 whitish or flesh-color to rose-purple. 



1 . M. odoratissima, Benth. Cinereous-puberulent or minutely tomen- 

 tulose, or nearly glabrous, but pale : a span to a foot high : leaves from nar- 

 rowly oblong to broadly lanceolate, entire or nearly so, short-petioled, or the 

 upper subsessile, both sides alike : bracts thin-membranaceous and colored 

 (whitish or purple) : calyx-teeth hirsute. Sierra Madre Range in Colorado, 

 and thence westward and northward. Odor of Pennyroyal. 



