(J.H.M. & R.H.C., Proc. Linn. Soc, N.S.W., 1905, p. 191.)

Systematic. - An erect, rather slender shrub up to 12 feet in height, forming dense clumps of small area; bark smooth, with the outer bark peeling off in ribbons. Abnormal leaves narrow, lanceolate, glaucous, oil glands profuse. Normal leaves narrow, very thick, smooth; venation scarcely showing, both sides shining, tips often hooked. Peduncles axillary, short, up to 2 lines long, bearing stellate clusters of buds. Flowers in dense heads numbering ten or more, sometimes flowering while in opposite leaf stage. Calyx narrow, turbinate, angular, about 1 1/2 lines long; operculum angular, pointed, about the same length as the calyx tube, often reddish.

Fruit. - Globular, shining, smooth or somewhat rugose; rim narrow, countersunk; valves not exserted; about 2 lines long and 2 lines in diameter.

These fruits are similar in shape to those of E. stellulata.

Habitat. - On the highest portion of the Blue Mountain Tableland. Talwong in the Shoalhaven district is the southernmost locality, New South Wales.

Plate XLI.

Transverse section of a portion of a leaf between the edge and mid-rib. This is a mountain species showing unusually large oil glands, the diameter extending the width of a strongly developed parenchymatous tissue below the tipper and lower surfaces. The epidermis is differentiated into a well-defined inner layer of cells, and an outer faintly marked cuticle. The inesophyll occupies only a limited area in the centre of the section. x 75.

Eucalyptus Moorei. j.h.m a R.H.C

REMARKS. - The size and shape of the leaves, and chemistry of the oil appear to be the chief specific distinctions from E. stellulata.

ESSENTIAL OIL. - Leaves and terminal branchlets of this species for distillation were received from Blackheath, N.S.W., in September, 1919. The yield of oil was 0.8 per cent.

The crude oil was of a dark amber colour with an odour resembling the cineol-pinene oils generally. A small quantity of pinene was present, but phellandrene was absent. Cineol was present in quantity, and crystallised eudesmol was also pronounced. A solid paraffin was also detected. Esters were only present in small quantity.

The crude oil had specific gravity at 150 C. = 0.9289; rotation aD + 6.12°; refractive index at 200 = 1.4699, and was soluble in 1.1 volume 70 per cent. alcohol. The saponification number for the esters and free acid was 6.1, and in the cold with two hours' contact it was 3.3.

On rectification 1 per cent, distilled below 1720 C. (corr.). Between 172-1930, 73 per cent. distilled; between 193-2760, 10 per cent. came over, and between 276-2810, 13 per cent. distilled. These fractions gave the following results: -

The cineol was determined by the resorcinol method in the first fraction; when calculated for the crude oil the result was 64 per cent. By the rapid phosphoric acid method it was 56 per cent. in the crude oil.

A portion of the oil was acetylated in the usual way, when the saponification number had risen to 52.4, and in the cold with two hours' contact it was 16.3. This result indicates that 13.4 per cent, of eudesmol, and 3.6 per cent. of free geraniol occurred in the crude oil.

The eudesmol was present in such quantity that it was prepared in a pure condition; the specific rotation was [a]D + 35.5°. The melting point was but 760 C. This low melting point was traceable to a small proportion of the paraffin still remaining, and when removed the melting point was 80° C.

The above amount of eudesmol is what was contained in the oil, but distillation was continued for some hours and a solid cake of eudesmol thus obtained floating on the condensed water; this amounted to about one-third of the total yield.

A sample of commercially distilled oil of this "Mallee," growing at Charley's Forest, between Nelligen and Mongarlowe, N.S.W., was submitted to us by Mr. Carlyle, in November, 1919. It had been distilled by the simple bush tank still, consequently much of the higher boiling constituents had not been obtained. The oil agreed very well with the sample distilled by us from the Blackheath material, and was equally rich in cineol. It had specific gravity at 150 C. = 0.924; rotation aD - 3.7°; refractive index at 200 = 1.4634; cineol 70 per cent. by the phosphoric acid method.