326 



REMARKS. -Our investigations show that thi.-. spivic^ h;-s little 1 or no connection with E. rinfcni.iitlcs, and 

 we are inclined to place the data under Cunningham's ]'. otcilnlia. .Maidon, "Critical Revision Genus Eucalyptus,'' 

 Vol. I, p. 234, places this latter and De Candolle's species, E. ligustrina under I-:. cngcniiiides, 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. eugenioidcs, var. nana). This plant might be described as 

 dimorphous, for one form appears to have been described by A. Cunningham under !'. olcijolia (1822), whilst the 

 other by De Candolle under E. ligustrina, and as the former was describe;! lirst, 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 denned. 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 15 C. = 0-9499 ' rotation a D + 22-4 ; 

 refractive index at 20 = 1-4974, and was soluble in i volume 80 per cent. 

 alcohol. The saponification number for the esters was 9, both by the hot and 

 cold methods; this represents 3-1^ 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 174 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 : 



First fraction, sp. gr. at 15 C. := 0-8725; rotation a D + 8-0; refractive 



index at 20 = 1-4732. 

 Second ,, ,, ,, = 0-8869; rotation a v + 10-4; refractive 



index at 20 = 1-4774. 



Third ,, ,, ,, = 0-9655; rotation a D + 28-4; refractive 



index at 20 = 1-5064. 



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 80 C., and the specific rotation was [] + 30, in a 10 per cent, chloro- 

 form solution at 21 C. 



/ 76. Eucalyptus apiculata. 



(R.T.B. & H.G.S., in Euc. and their Ess. Oils, ist Edit., 1902.) 



Systematic. A shrub 6 to 8 feet high. Leaves narrow, lanceolate, with 

 a pronounced recurved point, erect, thinly coriaceous, shining, 4 to 5 inches 

 long, petiole about 2 lines long; venation quite hidden beneath the cuticle', which, 

 when removed, shows the lateral veins to be oblique and spreading, and identical 

 in disposition with those of E. dives, Schau., and others of the " Peppermint " 



