LABIATA 171 



Oonneotive Joined to the filament by one end; only one anther cell ~ 19 



| 4. Stamens 4, perfect: corolla bilabiate: calyx 15 nerved. 



Flowers in oblong pednnoled heads, pale violet: stamens ezserted , 18 



6. Stamens 4, perfect, ascending under the concave or hooded tipper lip. 



Calyx with a projection on tipper side: flowers solitary axillary 14 



Calyx purple- tinged, upper teeth broad, obtuse, lower two lanceolate 15 



Calyx 10- toothed, the shorter 5 teeth spiny, recurved: corolla small, white 16 



Calyx nearly equally 6- toothed : flowers in whorls or interrupted spikes ........ 17 



1. TBJCHOSTEM A , Gronovius. 



1. T. Oblong-urn, Benth. Corolla-tube shorter than the calyx. Or.-CaL 



2. T. laxum, Gr. Diffuse: leaves petioled: cymes pednncled, often forked. 



3. T. lanceolatum, Benth. Gray-green: leaves crowded, sessile. Or.-CaL 



4. T. ovatum, Curran, Leaves round-ovate: calyx densely villous. 3. Cal. 



5. T. lanatum, Benth. Shrubby: leaves narrow: corolla woolly. Santa Barbara, & 



2. MENTHA, Linnaeus. 



1. M. Canadensis, L. Villous: leaves oblong-ovate or narrower. 

 Var. glabrata, Benth. The similar serrate acute leaves nearly glabrous. 



3. LYCOPUS, Tournefort. 



1. It. Virginicus, L. Stem obtuse-angled: sterile filament minute. Or. 



2. L. lucidus, Turcz, var, Americanus, Gr. Stem acute-angled, stont: runners 

 tuberiferons: calyx-teeth slender, equaling corolla. 



3. I*, sinuatus, Ell. Leaves mostly incised or pinna ti fid. N. CaL, Or. 



4. PYCNANTHEMUM, Michaux. 

 1. P. CalifomicturL, Torr. Leaves ovate or narrower, sessile, 1-3 in. long. 



5. MONARDELLA, Bentham. 

 | 1. Calyx over in. long: corolla- tube much longer than the lobes 1,8 



| 2. Calyx J.J in. long: corolla-tube but little longer than the linear or oblong flat lobes? 



flowers in dense involncrate heads. 



* Tufted: corolla flesh-color to rose, lobes linear: calyx-teeth soft. 



Leaves ovate to lanceolate, petioled, pinnately veined: bracts obtuse 8, 4, 6 



Leaves linear to oblong, entire, -f in. long, upper subsessile 6, 7 



* Annuals loosely branching: leaves entire or undulate, rather distinct, narrowed into a 



petiok: calyx-teeth with margined nerve- 

 Bracts rigidly cuspidate white and transparent except toe vein*. 8, 



