(DC, in Prod., vol. iii, p. 219.)

Systematic. - A low shrub, a few feet in height. Abnormal leaves ovate or oblong, thick and mucronate, about 1/2 inch in length, shortly petiolate or alternate. Normal leaves lanceolate, thick, coriaceous, shining, acuminate, usually falcate and unequal at the base; venation not prominent, intramarginal vein not far removed from the edge, lateral veins inclined at about 300 to the mid-rib. Flowers sessile in heads of about nine on axillary or lateral, angular peduncles, about 3 lines long. Calyx tube under 2 lines long, conoidal, twice as long as the scarcely pointed, semi-ovoid operculum.

Fruit. - Compressed, globular; rim narrow, flat or somewhat convex, reddish; valves scarcely exserted; about 2 lines long and 3 lines in diameter.

Habitat. - Blue Mountains, New South Wales.

REMARKS. Our investigations show that this species has little or no connection with E. eugenioides, and we are inclined to place the data under Cunningham's E. oleifolia. Maiden. "Critical Revision Genus Eucalyptus," Vol. i, p. 234, places this latter and De Candoile's species, E. ligustrina under E. eugenioides, var. nana, but later, Roy. Soc. N.S.W .. Vol. 52, p. 502, 1918, places it under E. ligustrina, and states that he is unable to distinguish the former (E. ligustrina) from some of the latter (E. eugenioides, var. nana). This plant might be described as dimorphous, for one form appears to have been described by A. Cunningham under E. oleifolia (1822), whilst the other by De Candollc under E. ligustrina, and as the former was described first, we think that name should stand by priority, but in order not to further increase the terminology of the genus we fall into line with Mr. J. H. Maiden.

ESSENTIAL OIL. - Leaves and terminal branchlets were obtained for distillation from Wentworth Falls, N.S.W., January, 1920. The yield of oil, which represents the whole obtained, was 0.12 per cent. The oil was of a light-orange colour, and had an aromatic odour, not well defined. The constituents detected were pinene, cineol, geranyl-acetate, geraniol, and eudesmol, together with the sesquiterpene. The principal constituent was crystallised eudesmol. Phellan-drene does not occur.

The crude oil had specific gravity at 150 C. = 0.9499; rotation aD + 22.4°; refractive index at 200 = 1.4974, and was soluble in 1 volume 80 per cent. alcohol. The saponification number for the esters was 9, both by the hot and cold methods; this represents 3.15 per cent. calculated as geranyl-acetate. After acetylation, the saponification number was 122.28, while in the cold with two hours contact, it was 22.8. This result represents 42.6 per cent. free eudesmol, and 3.8 per cent. free geraniol.

On rectification, practically nothing came over below 1740 C. (corr.). Between 174-193°, 12 per cent. distilled; between 193-214°, 12 per cent. came over, and between 273-300°, 65 per cent. distilled, leaving 10 per cent. of residue. The fractions gave the following results: -

The cineol was determined by the resorcinol method in the portion distilling below 193°; the result was 5 per cent. when calculated for the crude oil.

The above figures give the results obtained with the liquid portion, which represented one half of the total oil product. The other half, which distilled later and under a greater pressure of steam, consisted principally of eudesmol and the sesquiterpene. From this portion, the pure eudesmol was prepared; it melted at 8o° C, and the specific rotation was [a]D + 30°, in a 10 per cent. chloroform solution at 21° C.