Orthosiphon. | CII, LABIATH (BAKER). 365 
¢. ORTHOSIPHON, Benth.; Benth. et Hook. f. Gen. Pl. ii. 1174. 
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 l-celled. Disk glandular. Stigma capitate ; 
nucules ovoid, smooth or minutely rugose.—Herbs or undershrubs. 
Whorls forming long racemes. Stamens included or exserted. Habit 
of Ocimum, from which it differs 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. 
t T 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. 
1. O tuberosus. 
2. O. tenuiflorus. 
3. O. parvifolius. 
4, O. bartsioides, 
5. O. retinervis, 
Corolla not much longer than the calyx . 6. O. menthafolius. 
Corolla half as long again as the calyx 7. O. seabridus. 
TT Leaves shortly petioled. 
Leaves oblong-lanceolate . . . 8. O. salogensis. 
Leaves oblong. a 
Leaves thinly hairy : . . . . 9. O. shirensis, 
Leaves densely hairy . . . . - 10. O. tubulascens. 
Leaves ovate-lanceolate . . . . 11. O. cladotrichos 
Leaves ovate. 
Leaves very small, 
Calyx +; in. long . . . 12. O. mollis. 
Calyx } in. long. : 
Leaves acute . . . . . . 13. O. mombasicus. 
Leaves subobtuse .. . . . . 14. ?. calaminthoides. 
yx $i . . . 15. O. roseus. 
ce fine feng - . . . . 16. O. pallidus, 
Calyx 3 in. long . 
Leaves not very small. 
Leaves glabrous. 
Leaves regularly crenate . . 17. 0. heteroeliros. 
Leaves deeply inciso-crenate . 18. O. Stuklmanni. 
Leaves pubescent. 0. violaceus 
Corolla a little longer than the calyx . . 19. 2. riolae us, 
Corolla half as long again as the calyx ; . 20. O. rillosus. 
ice as long as the 
Corolla more than twice as ' a "a1. O. usambarensis, 
calyx . 
Leaves obovate-cbtuse. oo 
Leaves not very small . . . . . 22. O. dissitifolius, 
Leaves very smail . . . . . 23. O. malosanus. 
if SF 94. 0, Wakefieldit. 
Leaves orbicular 
