146 



76. Eucalyptus Parramattensis. 



(Cuthbert Hall, Proc. Linn. Soc., N.S.W., 1912, p. 568.) 



Systematic. A medium sized tree, 30 feet in height, with a smooth, 

 greyish, rather dirty bark. Abnormal leaves lanceolate, petiolate, thin, usually 

 alternate, sometimes acuminate. Normal leaves lanceolate, smaller than the 

 abnormal, often 7 inches long, acuminate, falcate, fairly thick ; venation 

 not very prominent, intramarginal vein not. far from the edge, lateral veins 

 fairly distant, inclined at an angle of 45 or more to the mid-rib. Peduncle 

 axillary, 3 lines long, with umbels of four to seven flowers. Buds on pedicels 

 i to 2 lines in length ; calyx tube turbinate, i^ lines long, about equal to the 

 conoidal operculum. (Operculum much longer than the calyx tube. C. Hall.) 



Fruit. Hemispherical ; shortly pedicellate, more or 

 less shining ; rim convex ; valves well 

 exserted ; 2j- lines long and 3 lines in 

 diameter. 



At first glance they might be mistaken for E. dealbata, 

 and then in similarity to E. resinifera, whilst perhaps 

 the next nearest thi flat-rim form of E. pumila. 



Habitat. New South Wales, from Milton to Mudgee and 

 Singleton. 



* 



ESSENTIAL OIL. Leaves and terminal branchlets of this species for 

 distillation were received from Fairfield, N.S.W., in May, 1911. The yield of oil 

 was 0-57 per cent. The crude oil was but little coloured and had an odour 

 resembling those of the cineol-pinene oils generally. Pinene was detected, but 

 phellandrene was absent. Cineol was present in great quantity, and if the yield 

 was greater the oil of this species would be one of the best of the cineol 

 group for commercial distillation. The rectified oil was yellowish in tint, as 

 is common with those of this class. The odour of the aldehydes, valeralde- 

 hyde and butaldehyde, was somewhat pronounced. 



The crude oil had specific gravity at 15 C. = 0-9223 ; rotation D + 2-7; 

 refractive index at 20 1-4629: and was soluble in i volumes 70 per cent, 

 alcohol. The saponification number for the esters and free acid was 4-6. The 

 amount distilling below 190 C. was 89 per cent. The cineol was determined by 

 the resorcinol method in the rectified portion, and when calculated for the crude 

 oil the result was 78 per cent. By the rapid phosphoric acid method it was 75 

 per cent, in the crude oil. 



