244 MINT FAMILY. 



6. COLEUS. fialvx as in No. 4. . Corolla similar, but the lower lobe longer and 

 concave or buat-sliaped,, enclosing the stamens and style: filaments monadel- 

 phous. 



6. HYPTIS. Calvx with 5 less unequal or equal teeth. Corolla of 4 short simi- 



lar upper lobes, and a longer abruptly deflexed saccate lower one ; filaments 

 « separate. 



7. LAVANDULA. Calyx not deflexed, 13-15-neiTed, 5-toothed, the upper tooth 



mostly larger. Corolla witli tube longer than the calyx, regularly 2-lipped, 

 i. e. upper lip 2-lobed, lower 3-Iobed, the lobes all equally spreading. Sta- 

 mens included, but declined towards the lower lobe of the corolla. 



§ 3. ■Stamens 4 {and the lower or outer pair .longest) or i, straight, ifnd distant or 

 diverging : anthers plainly 2-ceUed, ml conniving in p lirs. Lubes of the 

 corolla Jtut and spreading, or the upper erect hut nut arched. 



* Corolla short and rather belt-sknped, hardly if at all ^-lipped, the i or rarely 5 



lobes nearly equal and all spj'eading. 

 S. PEKILLA. Calyx in flower 5-clofr, in fri^it nodding and enlarging,. becoming 

 2-lipped. Corolla 5-eiefV, the lower lobe a little longer. Stamens 4, nearly 

 equal. Style deeply 2-cleft. - , ■ , }. . 



9. IIENTHA. Calyx equally 6-toothed. Corolla with a 4-cleft border, the^pper 

 lobe a little broader and sometimes, notched at the end. Stamens 4,, nearly 

 equal, similar. 

 JO. LYCOPUS. Calyx 4- 5-toothed. Corolla with 4 abrat equal lobei. Stamens 

 2 ; the upper pair, if any, without anthers. 

 « « Corolla evidently 2-lipped, but all the lobes of nearly equal length, the upper Up 

 erect and moslly notched, the lower spreading aaid- Z-cleftAlie tube not bearded 

 within : stamens uiith anthers only ^, '-■" • * 



11. CUNILA. Calyx equally E-toothed, striate, very hairy, in the throat, onejialf 



shorter than the corolla. Stamens 2, long and protruding: no rudiments of 

 the other pair. ' ' 



12. HEDEOMA. Calyx 2-lipped, gibbous on the lower side near the base, hairy 



:in the throat. ; Corolla short. Stamens 2, with anthers scarcely protruded, 

 and 2 sterile short filaments tipped with a little head in place of imtlier. 



* # * Corolla elorigated and irregular : the lower lobe or' lip much the larger, pe7i~ 



dent, cut-toothed or fringed, the 4 others nearly equal and alike: tvh& with ct 

 ftearded ring inside at the bottom of the enlarged throat ; stamens 2 with 

 anthers or rarely i. 



13. COLLINSONIA. Calyx ovate, enlarging and turned down after flowering, 



2-lipped, the upper lip. flat and 3-toothod, tlie lower 2-cleft. Cells of the an- 

 ther diverging. 

 « * * * Corolla evidently 2-lipped, short, the vpper lip erect or somewhat spread- 

 ing and nearly entire or notched, the lower spreming or 5-cleft : stamens with 

 anthers 4. 



14. HYSSOPUS. Calyx tubular, IS-rferved, equally 5-toothed, naked in the throat. 



Corolla with the middle lobe of the lower lip larger and 2-cleft. Stamens 

 very long and protruding. 



15. PYC5IAN I'HEMUM. Calyx oblong or short-tubular, about 13-nerved, equally 



6-toothed or somewhat 2-lipped, naked in the throat. Corolla with the lobes 

 of the lower lip ovate and entire. Flowers crowded in heads or close cymes. 



16. ORIGANUM. Calyx hairy in the throat, about 13-nerved. Lower lip of the 



corolla of 3 similar lobes. Flowers crowded into spike-like clusters and fur- 

 nished with imbricated often colored bracts. 



17. THYMUS. Calyx ovate, hairy in the throat, 13-nei-ved, 2-lipped ; the upper 



liii 3-toothed and spreading, the lower cleft into 2 awl-shaped ciliate lobes. 

 Corolla not strongly 2-lipped, the upper lip resembling the 8 lobes of the lower 

 lip but notched at the apex. Stamens mostly protruding. 



18. SA'l'URElA. Calyx bell-shaped, naked in the throat, 10-nerved, equally 



5-toothed. Corolla with lower lip of 3 nearly equiU entire lobes. Stamens 

 somewhat ascending. Leaves narrow. 



§ 4. Stamens 4 (the lower or outer pair longer), ascending or curved and tcith Iha 

 plainly 2-celled anthers approximate or conniving in pairs under the erect aJtd 

 Jlattish but not arched vpper lip. Calyx more or less 24ipped. 



19. CALAMINTHA. Calyx not flattened. Corolla straight, with inflated throat, 



and 2-lipped border, the spreading lower lip 3-parted, its middle lobe entire 

 Br slightly notched. 



