286 LABIATE. 



* * Calyx regular; corolla pronouncedly but not strongly bilabiate. 



Flowers densely glomerate terminally and in the upper axils; 



calyx short-tabular; corolla lobes short . . Kcellia 4 



Flowers in a simple terminal bracted flat-topped head Monardella 5 



Fowers 1 or 2 only in each axil; 



Stems slender, prostrate Micromebia 6 



" shrubby, erect Sphacele 10 



* * * Calyx regular; corolla strongly bilabiate. 



Calyx with 10 spinescent teeth, some of them hooked Marrubium 16 



Calyx with 5 more or less spinescent teeth; 



Nutlets with truncate summit Lamitjm 17 



" with rounded summit Stachts 18 



* * * * Both calyx and corolla bilabiate, the latter strongly so. 



Flowers few in each leaf-axil; 



Calyx oblong-campannlate, flattened on the back Melissa 7 



" closed in fruit, and with a casque-like projection on 



the back Scutellaria 14 



Flowers densely verticillastrate; 



Verticillaeters forming a close spike or thyrse; 



Upper calyx-lip truncate, 3-toothed Brunella 15 



Calyx oblique at the throat; teeth subequal Nepeta 13 



" strongly ciliate, deeply and unequally 5-cleft Pogogyne 8 



Verticillasters more remote; 



Subtended by prickly-margined bracts Acanthomintea 9 



Anthers with long filament-like connective, 1 cell at each 

 end, or 1 end with no cell; 



Upper lip of corolla manifest Salvia 11 



" " " obsolete Bamona 12 



1. TRICHOSTEMA, .Oronov. Herbs, ours annual, with a very keen 

 somewhat acid smell, and blue flowers in axillary cymes. Calyx 5-cleft. 

 Corolla with narrow tube and more or less oblique limb; the somewhat 

 similar lobes oblong. Stamens with capillary filament very long 

 exserted and curved, didynamous ; anther-cells divaricate or divergent. 



1. T. liixmii, Gray. Diffusely branching, 1 — 2 ft. high, minutely 

 pubescent, sparsely leafy: leaves lanceolate or oblong-lanceolate, acumi- 

 nate but obtusish, 2 — 3 in. long, nervose-costate, rather slender-petioled: 

 cymes pedunculate, loose: tube of corolla about 3 and limb 2 lines long. — 

 From Sonoma Co. northward. July — Oct. 



2. T. lanceolatum, Gray. Tall as the last, ratheT strict and simple, 

 only a few ascending branches from the base: herbage pale vilh a dense 

 pubescence: leaves crowded, costate-nerved, lanceolate or ovate-lanceolate, 

 tapering from near the broad base to a very acute tip: cymes short-pedun- 

 cled, dense: calyx villous: corolla somewhat pubescent. — Livermore 

 Valley, and northward and southward, towards the interior. June — Oct. 



2. MENTHA, Pliny (Mint). Fragrant perennial herbs, mostly 

 spreading by slender creeping rootstocks. Calyx short, 5-toothed. 



