Orthosiphon. 



CII. LABIAT.E (baker). 



305 



7. ORTHOSIPHON, Benth. ; Benth. et Hook. f. Gen. PI. ii. 11 74. 



Calyx deflexed in fruit ; tube campanulate or subcylindrical ; upper 

 tooth ovate, with the margins decurrent ; lateral and lower teeth smaller. 

 Corolla-tube cylindrical, usually longer than the calyx ; limb bilabiate 

 lower lip very slightly concave. Stamens 4, didynamous, declinate 

 filaments filiform ; anthers 1-celled. Disk glandular. Stigma capitate 

 nucules ovoid, smooth or minutely rugose. — Herbs or undershrubs. 

 Whorls forming long racemes. Stamens included or exserted. Habit 

 of Ocimurrij from which it difiers by its long corolla-tube and capitate 

 stigma. 



Species about 60, spread through the warmer regions of the Old World. 



'•Stamens not exserted beyond the lips of the corolla. 

 *j"j* Leaves sessile or subsessile. 



Corolla twice as long as the calyx. 

 Rootstock tuberous .... 



Rootstock not tuberous 

 Corolla less than twice as long as the calyx. 

 Leaves lanceolate .... 



Leaves oblong-lanceolate . 

 Leaves ovate-oblong 

 Leaves ovate. 



Corolla not much longer than the calyx 

 Corolla half as long again as the calyx 

 f ^Leaves shortly petioled. 

 Leaves oblong-lanceolate 

 Leaves oblong. 



Leaves thinly hairy 

 Leaves densely hairy 

 Leaves ovate-lanceolate 

 Leaves ovate. 



Leaves very small. 



Calyx Jj7 in. long . . . 



Calyx \ in. long. 



Leaves acute ...... 



Leaves subobtuse ..... 



Calyx ^ in. long 



Calyx \ in. long ...... 



Leaves nob very small. 

 Leaves glabrous. 



Leaves regularly crenate .... 



Leaves deeply inciso-crenate 

 Leaves pubescent. 



Corolla a little longer than the calyx . 

 Corolla half as long again as tho calyx 

 Corolla more than twice as long as the 



calyx 



Leaves obovate-obtusc. 



Leaves not very small . . . . • 



Leaves very small . . • • • 



Leaves orbicular ..... 



1. O fuberosus. 



2. O. tenuijlorus. 



3. O. parvifolius. 



4. O. hartsioides. 



5. O. retinervis. 



6. 0. menthcpfoliu-t. 



7. O. scabridus. 



8. O. salagensis. 



9. O. shirensis. 



10. O. tuhulascens. 



11. O. cladoirichos 



12. O. mollU. 



13. 0. momhaficvt . 



14. 0. calaminthoides. 

 16. O. rosevs. 



16. O. pallidum. 



17. O. heterochrous. 



18. O. Stuhlvianni. 



19. O. violaceus. 



20. O. rilloitus. 



21. O. ufambarensvs. 



22. O. ditsi/ifoliv*. 



23. O. malosanvs. 



24. O. Wakejleldii. 



