127 



Branchlets in seedling growth terete, but normally angular at first. Penduncles 

 axillary, flattened, short, thick, 3 lines long, with three sessile flowers. Calyx 

 tube compressed, angular, under 6 lines long ; operculum conical. 



Fruit. Hemispherical, sometimes slightly flanged, 

 shining generally with one rib ; rim 

 thickened, convex with a narrow groove 

 below it ; valves exserted ; 5 lines long and 

 6 lines in diameter. 



These come somewhat closely in form to those of 

 E. Mueller! or E. Baeuerleni. 



Habitat. Mount Nelson, Tasmania. 



t 



REMARKS.- A particularly rare tree that has been classed with several others by systematists by 

 Mueller, as a form of E.globulus; Maiden, a form of E. Maideni, F.v.M. (Rodway, Fl. Tas., p. 87). To us the 

 facts point to its being worthy of distinctive rank. 



ESSENTIAL OIL. Material for distillation was collected near Hobart 

 Tasmania, in August, 1912, and was quite fresh and green when received at 

 the Museum. The yield of oil from the leaves and terminal branchlets was 0-89 

 per cent. The crude oil was light-amber in colour, and had an odour resembling 

 that of the crude oil of E. globulus. It was fairly rich in cineol, and contained 

 dextro-rotatory pinene ; phellandrene was absent. The saponification number 

 was somewhat high, and the oil contained rather a large amount of high-boiling 

 constituents. The rectified oil had a distinctly yellow tinge. 



The crude oil had specific gravity at 15 C. = 0-9179 ; rotation D + 3-1 ; 

 refractive index at 20 = 1-4681, and was soluble in if volumes 70 per cent, 

 alcohol. On the addition of about 10 volumes of this alcohol the oil became 

 again turbid, indicating the presence of traces of the solid paraffin, a constituent 

 which occurs in greater quantity in the oil of E, acervula. The saponification 

 number for the esters and free acid was n-i. 



On rectification, a small amount of acid water and volatile aldehydes, 

 having an objectionable odour, came over below 170 C. (corr.). Between 170- 

 I 93> 83 per cent, distilled, and between 193-268, n per cent, distilled, mostly 

 above 260. These fractions gave the following results : 



First fraction, sp. gr. at 15 C. = 0-9104; rotation a D + 4-3; refractive 



index at 20 = 1-4623. 



Second ,, ,, = 0-9294; rotation not taken; refractive 



. index at 20 = 1-4900. 



The cineol was determined in the first fraction by the resorcinol method ; 

 the result was 62 per cent, when calculated for the crude oil. By the rapid 

 phosphoric acid method it was 54 per cent, in the crude oil. After acetylation 

 the saponification number was 20, thus showing the presence of alcoholic bodies 

 in the rectified portion. 



The results of this investigation were published by us in the Proc. Roy. 

 Soc., Tasmania, October, 1912. 



