t8 5 



97. Eucalyptus oleosa. 



I v M. in Neder. Kruid. Arch., iv, 127.) 

 Red or Water Mallee.- 



Systematic. — A small tree or shrub, under 20 feet. Bark rough and 

 persistent F.v.M.), branches smooth. Leaves scattered, narrow-lanceolate, 

 acuminate, varying in length from 1 to 6 inches, coriaceous; venation indistinct, 

 or obscured, oblique veins line, numerous, intramarginal vein slightly removed 

 from the edge. Oil glands very numerous, hut hidden, owing to the thick 

 cuticle. Peduncles axillary or lateral, each with aboul six to eleven pedicellate 

 (lowers on slender stalklets, slightly longer than the calyx. Calyx turbinate, .1 

 little over 2 lines long, and 2 lines in diameter; operculum conical, acuminate. 

 rarely obtuse, usually exceeding the calyx tube, and sometimes much Ion-' 1 



Fruit. Globular, truncate ; rim thin, contracted at 



tin- orifice; valves acute, long and -lender, 

 well exserted; under 3 lino in diameter. 



The long Hen i yes are a vi ry marked 



feature of the fruit of tins species, and make the 

 herbarium material easy of determination 



Habitat. — Queensland; Victoria; South Australia; Western 

 Australia; south and western interior "I New 

 South Wales. 



REMARKS. — In the field it is generallj a ociated with 1 viridis R..T.B., 1 I ■ M, E. dumosa, 



A. Cunn., from which congene h differs in fruits, nature <>i the bark, and timber. 1 1 1, - bark of this tree is 



remarkably thin for ;i 1 ucal; pi ;i i 11 hiefl) .'- .1 " Mallee " in extended pati h< ometimes covering miles ol 



ground and is only occasionally found growing ,1- .1 tree- when it attains .1 height ol more than 30 feet, and a 

 diameter up to 1 8 inches, The larger stems are generally hollow, ai mbei pin! ,,1 reddish in colour, close- 



grained, hard, and interloi i 



ESSENTIAL OIL.- Leaves and terminal branchlets lor distillation were 

 obtained from Nyngan, N.S.W., in November, i N < , < j ■ The yield of oil was 

 i-i per cent. The crude oil was reddish-brown in colour, and had an odour 

 resembling those of the cineol pinene cla>s. It was rich in cineol, contained 

 pinene, but phellandrene was absent. Aromadendral was present, and it was to 

 this constituent that the larvo-rotation of the crude oil, and the higher boiling 

 traction was due. After some time the crude oil deposited a powdery substance 

 in considerable quantity. The high-boiling portion contained some sesquiter- 

 pene, but the amount ol esters was -mall. 



The crude oil had specific gravity at 15 (". - 0-925; rotation a B - 1-5°; 

 refractive index at 20 = 1-4689, and was soluble in i| volumes 70 per cent, 

 ali oh'ol. The saponification number for the esters and free a< id was pa. 



♦ The t'.rm "Mill,' i applied in Australi: diffei in their mo owth 



fr.j.u other i numbei ,>i own in the 



plate 



5006S X 



