344 LABIATiE. 



middle one emarginate-2-lobed. 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. 



b. Stamens 2 antheriferous, ascending parallel under the upper lip ; the posterior pair either 

 wanting or rudimentary, or witli imperfect (rarely perfect and poUiniferous) anthers : 

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



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

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

 ring within the throat or tube; u])per lip erect, emarginate ; lower 3-cleft and spreading, 

 the broader middle lobe emarginate. Posterior filaments mere subulate rudiments. 

 Fruticulose and canescent. 



23. HEDEOMA. Cal^^x from tubular to oblong, usually gibbous, more or less bilabiate 

 or unequally 5-toothctl (the two lower teeth different and longer), mostly 13-striate, hairy 

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

 naked : upper lip erect, entire or 2-lobed ; lower 3-clcft, spreading. Posterior stamens 

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



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

 times 2. 



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

 lobes much longer than the campanulate or turbinate 15-nerved tube ; throat naked. 

 Corolla straight, 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 pairs : anther-cells parallel and muticous : posterior fila- 

 ments much shorter and sometimes sterile. Style more or less hirsute-beai'ded above. 

 Flowers verticilhistrate-glomerateand spicate : bracts and calyx strongly ciliate. 



25. CERANTHERA. Calyx tubulose-campanulate, 13-nerved, nearly terete, villous in 

 the throat, bilabiate ; lips short ; tiie 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 much-dilated short throat, and rather short and 

 spreading lips ; the upper one nparly entire, the lower 3-cleft. Fertile stamens 4 : filaments 

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

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

 linear, entire. 



•H- +H- ++ Calyx 13-nerved : upper lip of corolla concave and more or less incurved or 

 fornicate, after the manner of the succeeding tribes. 



26. ACANTHOMINTHA. Calyx tubular-campanulate, 1.3-nerved, naked in the throat, 

 bilabiate ; upper lip 3-toothed ; lower 2-cleft ; teeth all acerose-spinulose from a broader 

 base ; the anterior shorter. Corolla with tube exceeding the calyx, naked within ; upper 

 lip entire, oblong ; lower broad and spreading, 3-lobed ; lobes short and rounded, middle 

 one deeply and the lateral slightly emarginate. Stamens 4, inserted high in the ampliate 

 throat : anterior pair fertile, ascending under the upper lip, bearing 2-celled anthers, the 

 cells divaricate and somewhat confluent : posterior pair much shorter, with filiform fila- 

 ments, and small imperfect or abortive 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 tube within : calyx 

 irregularly about 10-nerved, reticulate-veiny, enlarging and commonly 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- 

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

 Leaves veiny. 



Tribe IV. MONARDE^. Antheriferous 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 filament-like connective, which is articulated with 

 tlie fihinuMit, a fertile antlier-cell at the ascending end, and sometimes one at the lower. 

 Calyx bilabiate; its lower lip 2-cleft. 



