(Endl., in Hueg. Enum., 49, 1837.)

Systematic. - A moderate-sized tree, the bark rough, and persistent. Abnormal leaves ovate, petiolate; normal leaves lanceolate, often falcate, acuminate, about 4 inches long, intramarginal vein not far removed from the edge, lateral veins distant, inclined at about 45° to the mid-rib. Peduncles axillary or lateral, about 6 lines long, bearing umbels of three to eight flowers. Calyx tube turbinate, 3 lines long, tapering to a pedicel of equal length; operculum conoidal, often longer than the calyx tube.

Fruit. - Broad, turbinate or bell shaped, dilated at the top, particularly so in the younger stages; rim truncate or very slightly convex; valves much exserted; 3 to 5 lines long and 5 to 6 lines in diameter.

E. patentinervis, an eastern species, more closely matches this than any other, but is not quite so large.

Habitat. - Western Australia.

ESSENTIAL OIL. - Leaves and terminal branchlets for distillation were forwarded by Mr. C. E. Lane-Poole, the Conservator of Forests, Western Australia. The material was collected at Donnybrook, W.A., January, 1919, The yield of oil was 1.2 per cent.

The crude oil was of a dark amber colour, and had an odour similar to those of pinene-cineol oils generally. Volatile aldehydes were pronounced. The pinene was dextro-rotatory, and phellahdrene was absent. Cineol was present in fair amount. Esters were in small quantity, but those present were high-boiling. A small amount of the sesquiterpene was also present.

The crude oil had specific gravity at 15o C. = 0.9068; rotation aD + 10.1°, refractive index at 20° = 1.4695, and was soluble in 1 volume 80 per cent. alcohol. The saponification number for the esters and free acid was 3.2.

On rectification 1 per cent, distilled below 162o C. (corr.). Between 162-172o, 50 per cent. distilled; between 172 193°,30 per cent. came over, leaving 19 per cent. boiling above 193o. The two fractions and the residue gave the following results: -

The cineol was determined by the resorcinol method in the portion distilling between 162-193°; when calculated for the crude oil, the result was 45 per cent. A determination by the rapid phosphoric acid method gave 38 per cent.

The saponification number for the residue was 11.3, and in the cold with two hours' contact it was 8.3.

The phenols were removed in the ordinary way; they were liquid and gave the reaction for tasmanol. The amount of phenols present in the crude oil was 0.18 per cent.

The rectified oil was yellowish in tint, a character common to the oils of this class. This colour is probably due to the influence of the phenol australol.