LADIAT^E. (mint li-AMILY.) 301 



11. SATIJREIA. Calyx bell-shaped, naked in tho throat, 10-nerved, eixuaUy 5-toothed. Sta- 

 mens somewhat ascending. 



12 CALAMINTHA. Calyx tubular, often hairy in the throat, 13-nerved, 2-lipped. Tube of 

 the corolla straight. Stamens eonniTent at the summit in pairs under the upper lip 



13. MELISSA. Calyx tubular-bell-shapedj 2-lipped, flattisU on the upper side, Tube of th« 



corolla curved upwards. Stamens curved above, counivent under the erect upper lip. 

 •t^ •*- -i- Stamens only 2 with anthers, ascending, and a pair of small sterile lliamcuts. 



14. HEDEOMA. Calyx gibbous on the lower side, hairy in the throat. Flowers loose. 



* f^ * Corolla 2-Iipped, with a bearded ring inside at the bottom of tho enlarged throat. Sttv- 



mens 2 or 4, long, diverging. 

 16. COLLINSONIA. Calyx enlarged and declined in &uit, 2-lipped. Lower lobe of the corolla 

 much larger than the other four, 



TaiDfi III. MOHAICDEj.^. Stamens 2 (eometimes with mere rudiments of the upper 

 pair), ascending and parallel : anthers apparently or really 1-celled. Corolla 2-lipped. 

 Nutlets aa in Tribe II. 



16. SALVIA Calyx 2-lipped Anthers with a long connective astride the filameqt, bcariug 

 a linear cell at the upper end, and none or an imperfect one on the lower. 



17 MONAKDA. Calyx tubular and elongated, equally B-toothed. Anthers of 2 cells conflu- 

 ent into one : connective inconspicuous. 



18. BL3CPHILIA Calyx ovate-tubular, 2-lipped. Anthers as in No 17. 



Tribe IV. !IVKP£TKiK. Stamens 4, the superior (inner) pair longer than the inferior ! 

 ascending or diverging. Corolla 2-lipped; the upper lip concave or arched, the lower 

 spreadhig. Calyx mostly 16-nerved. Kutlcts as in Tribes II. and III. 



19. LOPIIANTIITJS. Stamens divergent ; the upper pair curved downwards ; the lower as- 



cending : anther-cells nearly parallel. 



20. NBPBTA. Stamens all ascending ; the anthers approximate in pairs ; the cells at length 



widely diverging. Calyx curved. 



21. DRACOCBPHALUM. Stamens nearly as in No. 20. Calyx straight, the upper lip or tooth 



commonly larger. 



22. CEDRONELLA. Stamens all ascending. Anther-cells parallel. 



Tribb V. STACHYI>EjE. Stamens 4, ascending and parallel ; the inferior (outer) 

 pair longer than the superior, except in No. 33. Anthers usually approximate in pairs. 

 Corolla 2-lipped ; the upper lip concave or arched. Calyx 5-10 nerved. Nutlets as ia 

 tho preceding. 



* Calyx not 2-Iipped, thin and membranaceous, inflated-bell -shaped in fruit. 



23 SYNANDRA Calyx i-lobed ! Anther-cells widely diverging from each other. 



24 PHYSOSTEGIA. Calyx 5-toothed. Anther-cells parallel. 



# * Calyx 2-lipped, closed in fruit. 



25 BRUNBLLA. Calyx nerved and veiny ; upper lip flat, 3-toothed, tho lower 2-clcft 



26. SCUTJILLAIIIA. Calyx ivith a helmet-like projection on the upper side; the lips entire 



# * * Calyx not 2~lipped, nor the tube inflated, 5 - 10-toothed 

 -(- Stamens included in the tube of the corolla. 



27. MARRUBIUM. Calyx tubular, 5 - 10-nerved, and with 5 or 10 awl-shaped teeth. 



4- •*- Stamens projecting beyond the tube of the corolla. 

 ++ Anthers opening transversely by 2 unequal valves ; the smaller valve ciliate. 



28. GALEOPSIS. Calyx tubular-bell-shaped ; the 5 teeth spiny-pointed. 



** ++ Anthers opening lengthwise. 



29. STACHYS. Calyx tubular-bell-shaped. Nutlets rounded at the top. Stamens after shed- 



ding the pollen often turned downward. 



30. LEONURUS. Calyx top-shaped, the rigid and spiny-pointed teeth soon spreading Nut- 



lets truncate and acutely 3-angled at the top. 



31. liAMlUM. Calyx-teeth not spiny -pointed. Nutlets sharply 8-angled, truncate at the top. 



26 



