Pycnostachys. | 
One additional species in Madagascar. 
*Leaves sessile. 
Leaves linear, 
Calyx-teeth not longer than the tube 
Calyx-teeth finally twice the length of the tube 
Calyx- -teeth three times the length of the tube 
Leaves linear-lanceolate . . . . 
Leaves lanceolate. 
Spikes cylindrical. 
Teeth of fruit-calyx erect . 
Teeth of fruit-calyx spreading . 
Spikes oblong or conical. 
Leaves very small, fascicled 
Leaves opposite, not very small, 
Leaves 14-2 in. long, deflexed 
Leaves middle-sized, 
Calyx-teeth 1-4 in, long 
Calyx-teeth } in. long 
Leaves large, 
Leaves amplexicaul . 
Leaves not amplexicaul 
Spikes globose. . : . . . 
Leaves oblong-lanceolate. 
Calyx-teeth 44 in. long. 
Veins of the lower surface of the leaf slightly 
raised 
Veins of the lower surface ‘of the leaf ‘much raised 
. 16. 
. 17. 
. 18. 
. 19. 
Calyx-teeth 2 in. long, 
Leaves glabrous 
Leaves pubescent 
Leaves oblong 
Leaves ovate . 
*Leaves shortly petioled. 
Leaves linear or lanceolate 
Leaves oblong-lanceolate . 
Leaves oblong. 
Leaves subentire . 
Leaves deeply serrate : 
Leaves ovate. 
Calyx-teeth cn in, long 
eax Calyx-teeth +-2 in. long 
“Leaves with a long stole. 
Leaves lanceolate 
Leaves oblong-lanceolate . 
Leaves oblong 
Leaves ovate-lanceolate. 
Leaves glabrous . . 
Leaves pubescent 
Leaves ovate. 
Leaves glabrous. 
Calyx-teeth subulate . . 
Calyx-teeth lanceolate-subulate . 
Leaves pubescent on the ribs and edges . 
Leaves densely pubescent . . . 
CII. LABIATH (BAKER). 
mm oo bo eH 
379 
. P. stenostachys, 
. P. Schweinfurthii, 
P. Descampsii 
. PB. Stuhlmannié, 
. BP. congensis, 
. P. micrantha. 
. P. parvifolia. 
. P. deflexifolia. 
. P. Kirkii. 
. P. remotifolia, 
. PB. speciosa, 
P. affinis, 
. P. spharocephala. 
14. P. reticulata. 
. 20. 
. 21. 
. 22. 
. 23. 
. 24. 
. 25. 
. 26. 
. 27. 
. 28. 
. 29. 
. 80. 
. 3. 
. 32. 
. 33. 
, 34. P. urticifolia. 
. BP. decussata, 
P. Petherickii, 
P. niamniamensis 
P. Whyte. 
P. nepetafolia. 
P. verticillata, 
P. Volkensit. 
P. Hanningtonii. 
P. Meyeri. 
P. ruwenzoriensis. 
P. abyssinica, 
P. Goetzenii. 
P. Emini. 
P. oblongifolia. 
P. orthodonta. 
P. pubescens, 
P. leptophylla. 
P. Balesii, 
P, cyanea, 
