(Schau., in Lehmann's Plant. Preiss., 1, 127, 1844.) White Gum.

Systematic. - A shrub or small tree preaching up to 120 feet, F.v.M., var. elata, Benth.), with a smooth white bark. Normal leaves ovate-lanceolate to lanceolate, sometimes acuminate, averaging about 3 inches long, thick, coriaceous, often somewhat crenulate; venation moderately distinct at times, intramarginal vein looped, much removed from the edge, lateral veins distinct, and fairly oblique, inclined at about 45° to the mid-rib. Peduncles axillary or lateral, bearing dense umbels of five to fourteen flowers. Calyx tube narrow, about 2 1/2 lines long, contracted into a short pedicel and shorter than the conical, acute, slightly bent operculum.

Fruit. Narrow, turbinate or even sub-cylindrical ; rim thin, flat; valves slightly exserted; 3 1/2 lines long and 2 lines in diameter (occasionally larger than those depicted).

In shape they nearly approach thoss of E. campanu-lata, E. accedens, or E. Consideniana, although smaller in the latter case.

Habitat.-Western Australia.

ESSENTIAL OIL. - Material of this species for distillation was forwarded from Western Australia, in February, 1904. It was obtained at Narrogin, on the Great Southern Railway. The yield of oil was 1.2 per cent. The crude oil was red in colour, and had an odour characteristic of the cineol-pinene oils generally. Pinene was present in quantity, and it principally belonged to the dextro-rotatory form. Phellandrene was absent, and esters only present in small amount. The higher boiling portion consisted principally of the sesquiterpene, and it is doubtful if aromadendral occurs. Cineol was present in some quantity, but the excess of terpenes caused the oil to be somewhat insoluble in alcohol.

The crude oil had specific gravity at 15° C. = 0.9097; rotation aD + 13.5°; refractive index at 20° = 1.4663, and was soluble in 6 volumes 70 per cent. alcohol. The saponification number for the esters and free acid was 2.-4.

On rectification, 1 per cent, distilled below 162o C. (corr.). Between 162-172o, 49 per cent, distilled; between 172-183o, 37 per cent. came over; between 183-193o, 4 per cent, distilled, and between 245-261°, 3 per cent, distilled. Practically nothing distilled between 193 and 245 °. The fractions gave the following results: -

The cineol was determined by the phosphoric acid method in the portion distilling below 183o; the result was 43 per cent, of that constituent, indicating about 38 per cent, in the crude oil (O.M.).

In September, 1918, material for distillation was received from Mr. C. E. Lane-Poole, the Conservator of Forests, Western Australia. The oil was practically in agreement with the above, except that the yield was a little less. The cineol was determined by the resorcinol method in the portion distilling below 190o C. ; when calculated for the crude oil, the result was 34 per cent.