150 



opposite, terete, under 3 lines Long, bearing three comparatively large flowers, 

 glaucous. Calyx campanulate, 3 lines long and 3 lines in diameter ; operculum 

 conic d. shorter than the calyx. 



Fruit.- Sessile, hemispherical or inclined to bell- 

 shape ; rim thick, truncate, slightly rounded 

 or countersunk, with a narrow edge ; valves 

 slightly exserted ; 3 to 4 lines in diameter. 



/ /irst' fruits are distinctive from those of other species 

 except E. cinerea. 



Habitat. — Cox's River, Cow Flat, New South Wales. 



REMARKS. -At the time of the publishing of the first edition, the systematic recognition of this species 

 by us was very much challenged, and so the remarks in that edilion were given rather fully in order to support our 

 contention that it is not E. cord at a of Tasmania or E. cinerea of New South Wales. 



As its specific rank is now firmly established, those remarks (he. cil.) are omitted from this edition. 



ESSENTIAL OIL. — Leaves and terminal branchlets for distillation were 

 obtained from Bathurst, N.S.W., in February, 1901. The yield of oil was large, 

 33 ounces being obtained from 93 lb. of leaves and branchlets , equal to 2-22 per 

 cent. The branchlets were stiff and woody, owing to the peculiar structure of 

 this species ; consequently more stems were present than was generally the case 

 with most other Eucalypts, so that the result demonstrates how great is the 

 quantity of oil secreted in the leaves of this species. The crude oil was of 

 an amber colour, and had an odour resembling those of the cineol-pinene 

 class of Eucalyptus oils. It was very rich in cineol ; pinene was present, but 

 phellandrene was absent. The chemical constituents and physical properties 

 of the oil of this Eucalypt are in agreement with those of E. cinerea. The 

 esters were rather pronounced. 



The crude oil had specific gravity at 15 C. = 0-9236 ; rotation a u + 2-12° ; 

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

 alcohol. The saponification number for the esters and free acid was 18-4. 



On rectification 2 per cent, distilled below 166 C. (corr.). Between 

 166-183°, 78 per cent, distilled, and between 183-196°, 15 per cent, distilled. It 

 is thus evident that the sesquiterpene and other high-boiling constituents were 

 only present in small amount. The fractions gave the following results :— 



First fraction, sp. gr. at 15° C. = 0-9208; rotation « D 4- 2-45°. 



Second ,, ,, ,, = 0-9217; ,, not taken. 



The cineol, determined by the phosphoric acid method in the first fraction, 

 was 60 per cent, in the crude oil (O.M.). 



The above sample of oil had been stored in the dark, and in August, 1919, 

 was again analysed. The increase in cineol was distinctly shown, the rectified 

 oil at that time being quite equal to that of E. polybractea. 92 per cent, 

 distilled below 190° C. The crude oil and the redistilled portion gave the 

 following results :■ — 



Crude oil, sp. gr. at 15° C. = 0-9305 ; rotation a D + 2° ; refractive 



index at 20° = 1-4609. 

 Rectified portion * ,, = 0-9250 ; rotation a D + 2-5° ; refractive 



index at 20° = 1-4594. 

 The cineol was determined by the resorcinol method in the rectified portion 

 and calculated for the crude oil ; the result was 88 per cent. By the rapid 

 phosphoric acid method it was 74 per cent, when calculated for the crude 

 oil. Terpineol was detected in the rectified portion. 



