(F.v.M., in Jour. Linn. Soc, 1859, iii, 85.)

Systematic - A small tree, with an ash-brown, scaly, wrinkled and fissured bark, persistent on trunk and branches. Leaves alternate, narrow-lanceolate, elongated, falcate, acuminate, 3 to 6 inches long, and 4 to 8 lines broad; venation not prominent, intramarginal vein distant from the edge. Umbels axillary or lateral, three- to seven-flowered, peduncles angular, 3 to 5 lines long. Calyx tube hemispherical, indistinctly ribbed, shortly pedicellate, half as long as the conical, somewhat obtuse operculum.

Fruit.- Hemispherical; rim broad and very prominent, almost conical; valves much exserted; 3 to 4 lines in diameter.

The fruits show a great resemblance to those of E. tereticornis and E. rostrata, but the bark differentiates it from each, being closely allied to the "Bloodwoods."

Habitat. - Eastern portion of Queensland.

ESSENTIAL OIL. - Leaves and terminal branchlets of this species for distillation were received from the Boyne River, Gladstone, Queensland, in September, 1908. The material was sent by Mr. H. S. Owbridge, through Mr. McMahon, the late Director of Forests for that State. The yield of oil was 0.82 per cent.

This Eucalypt is known in the Boyne River District as "Peppermint," but the oil has no resemblance to those of the members of the "Peppermint" group growing in the Southern States.

The crude oil was reddish in colour, and had an odour resembling the cineol-pinene oils generally. The constituents present were cineol, pinene, aroma-dendral, and the sesquiterpene; volatile aldehydes were pronounced, and cymene was probably also present.

The crude oil had specific gravity at 150 C. = 0.8977; rotation aD + 12.2°; refractive index at 200 = 1.4729, and was soluble in 5 volumes 80 percent, alcohol. The saponification number for the esters and free acid was 4.7.

On rectification, 2 per cent. distilled below 1610 C. (corr.). Between 161-1670, 40 per cent. distilled; between 167-174°, 24 per cent. came over; between 174-183°, 16 per cent. distilled; between 183-228°, 8 per cent. distilled, and between 228-255°, 6 per cent. These fractions save the following results: -

The cineol was determined by the phosphoric acid method; the result was 29 per cent, in the crude oil.

The lævo-rotation of the higher fractions was due to the aromadendral. The oil of this species does not contain phellandrene, nor was eudesmol detected.