372 R. T. BAKER AND HENRY G. SMITH. 



terpene in the oil of this species is therefore dextro- 

 rotatory pinene, and the limonenes appear to be absent. 



The high boiling fraction consisted largely of the sesqui- 

 terpene, which is so pronounced a constituent in the oil of 

 M. pauciflora, and the characteristic colour reactions were 

 readily obtained with it. It also contained a fair quantity 

 of ester, the saponification number being 20*7. The odour 

 of the separated oil, after saponification, reminded of ter- 

 pineol, and the acid was determined as acetic, so that the 

 ester is probably terpinyl-acetate, and the fraction thus 

 contained 7*24 per cent, of that substance. 



Melaleuca pauciflora, Turcz. 



Historical.— This species was described by Turczaninoff 

 in Bull. Mosc. in 1847, and so far its systematic position or 

 rank has not been challenged, nor has it any appendages in 

 the form of synonyms. 



Remarks.— This Melaleuca is characterised by leaf 

 features found to occur only in one other species of the 

 genus, viz., M. liypericifolia, which latter species has, 

 however, other specific differences sufficient to warrant a 

 systematic differentiation. The inflorescence of the two 

 also shows marked distinctiveness. The leaves of this 

 species have the peculiarity of incurving unless pressed as 

 soon as gathered. 



Leaf Histology.— As this plant has a convex leaf a trans- 

 verse section gives a vinculum figure. The leaf is chan- 

 nelled above so that two convex surfaces form the upper 

 cuticle, which is characterised below by a very much 

 thicker development of palisade parenchyma than the 

 upper surface, as shown in the plate. The spongy paren- 

 chyma is fairly limited in area, the cells being circular in 

 cross section. Stomata occur on both surfaces, and are 

 rather more numerous than obtains in other species of 



