344 LABIATE. 



middle one eniarginate-2-lobcd. Stamens arcuate-ascending under the upper lip, parallel : 

 cells of the anther at length separated on a transversely dilated connective, their base 

 bearing a small tuft of delicate villous hairs. Leaves linear, with entire revolute margins, 

 one-ribbed. 



6. Stamens 2 antherifcrons, ascending parallel under the upper lip ; the posterior pair either 

 wanting or rudimentary, or with imperfe(;t (rarely perfect and poUiniferous) anthers: 

 calyx tubular or tubular-campanulate, more or less villous-bearded in the throat. 



22. POLIOMINTHA. Calyx cylindraceous or cylindrical, terete and regular, 13-15- 

 striate, bearded in the throat, equally 5-toothed or nearly so. Corolla mostly with a hairy 

 ring witiiin the throat or tube ; upper lip erect, emarginate ; lower 3-cleft and spreading, 



- the broader middle lobe enuirginate. Posterior filaments mere subulate rudiments. 

 Frutieulose and canescent. 



23. HEDEOMA. Calyx from tubular, to oblong, usually gibbous, more or less bilabiate 

 or unequally 5-tootlied (the two lower teeth different and longer), mostly 1.3-striate, hairy 

 or villous-bearded in the throat, which is commonly contracted in fruit. Tube of corolla 

 naked : upper lip erect, entire or 2-lobed ; lower O-clef t, spreading. Posterior stamens 

 either none, or sterile, or in the original species sometimes antlieriferous ! Low herbs. 



= = Style bearded or villous, sometimes sparingly so : antlieriferous stamens 4 or some- 

 times 2. 



24. POGOGYNE. Cal_yx very deeply and unequally 5-clcft, at least the two longer (lower) 

 lobes much longer than the canipanulate or turbinate lo-nerved tube ; throat naked. 

 Corolla straiglit, tubular-funnelform, with short lips ; the erect entire upper lip and the 

 spreading lobes of the lower one oval and somewhat similar. Stamens ascending and 

 above somewhat approximate in j)airs : anther-cells parallel and muticous : posterior fila- 

 ments much sliorter and sometimes sterile. Style more or less hirsute-bearded above. 

 Flowers verticillastrate-glomerate and spicato : bracts and calyx strongly ciliate. 



25. CERANTHERA. Calyx tubulose-canipanulate, lo-nerved, nearly terete, villous in 

 the throat, bilabiate; lips short; the upper recurved-spreading and entire or slightly 

 3-toothed ; the lower scarcely longer and 2-cleft. Corolla with a straight narrow tube 

 barely exceeding the calyx, an abruptly nnich-dilated short throat, and rather short and 

 spreading lijjs ; the upper one nearly entire, the lower 3-cleft. PY-rtiie stamens 4 : filaments 

 capillary, somewhat ascending, cxserted, and above diverging : cells of the anther divari- 

 cate on a broad connective, aristate or pointed! Style long-exserted, pubescent. Leaves 

 linear, entire. 



++++++ Calvx 1.3-nerved : upper lip of corolla concave, erect, straight, or a little incurved 

 or fornicate, after the manner of the succeding tribes : bracteal leaves aristate-spinulose. 



26. ACANTHOMINTHA. Calyx tubular-campanulate, 13-nervecl, naked in the throat, 

 stronglv bilabiate ; upper lip 3-toothed ; lower 2-cleft, shorter ; teeth all acerose-spiuulose 

 fromli"i)roader base. Corolla with tube exceeding the calyx, naked within ; upper lip nar- 

 row, oblong ; lower broad and spreading, 3-lobed ; lobes short and rounded, middle one 

 deeply and" the lateral slightly emarginate, or all entire Stamens 4, inserted high in the 

 ampliate throat: anterior pair fertile, ascending under the upper lip, bearing 2-celIeil an- 

 thers, the cells divaricate : posterior pair much shorter, with filiform filaments, and cither 

 abortive or smaller anthers. Style 2-lobed at apex ; lobes or stigmas subulate, the posterior 

 shorter. Nutlets smooth. 



* * * * Corolla obscurely bilabiate: a hairy ring at base of the tidie witliin: calyx 

 irregularly about 10-nerved, reticulate-veiny,' enlarging and commoidy inflated after 

 flowering. 



27. SPHACELE. Calyx campanulate, deeply and nearly equally 5-toothed, membra- 

 naceous at least in fruit, naked within. Corolla with a broad tube, and 5 broad or 

 roundish and plane rather erect lobes, the lower one longest. Stamens4, distant, some- 

 what ascending : filaments naked: anthers somewhat approximate, the cells diverging. 

 Leaves veiny. 



Tninr, IV. IMONARDE^E. Antlieriferous stamens only 2 (the posterior pair rudi- 

 mentary or wanting), straight or commonly parallel-ascending; the anther with nar- 

 row usually oblong-linear cells, which are either widely separated on the upper and 

 lower ends of a linear or filiform commonly filament-like connective (which is usually 

 longer than the filament itself and articulated with it), or the lower cell wanting or 

 difformed, or the two cells confluent into one linear cell. Corolla bilabiate. 



* Anther dimidiate on the elongated filamentdike connective, which is articulated with 

 the filament, a fertile anther-cell at the ascending end, and sometimes one at the lower. 

 Calyx bilabiate; its lower lip 2-cleft. 



