454 



ODOKOGPtAPHIA. 



most numerous, and give rise to a frosted appearance. The 

 epidermis is provided with numerous simple stomata. The venation 

 is reticulate, and remarkably prominent on the under surface of 

 the leaf. A few oil globules are met with in the parenchyma, but 

 the aroma is chiefly situated in the glandular hairs. The flower 

 spike is terminal, erect, long, verticelled, before the flower ", expand 

 imbricated with 4 row^s of caducous Ijractes. Flowers numerous, 

 blue. Perianth hairy, upper lip broad as in Ocimum, the lower lip 

 long, projecting, concave. Filaments conjoined as in the diadel- 

 phous flowers, longer than the under lip, ascending, towards the 

 apex distinct, the upper shortest. 



Vol. L, p. 88. 

 Citronella oil. The shipments of this oil from Ceylon in 

 1892 were as follows : — • 



To the United Kingdom ... ... 6,952,152 ozs. 



„ France 



Total 



Vol. I., pp. 104 and 106. 

 Violet and Orris. F. Tiemann and P. Krliger have 

 endeavoured during ten years to isolate tlie chemical principle to 



