e6s 



88, Eucalyptus globulus. 



I .il.ill . Voy. I. 153, t. XIII.) 

 Blue Gum. 



Systematic. A Lofty tree with a smooth, whitish blue bark. Abnormal 

 leaves sessile, or shortly petiolate, cordate, covered (as also the twigs) with a 

 glaucous bloom. Normal leaves lanceolate, falcate, 9 inches to 1 fool long, 

 rather thick ; venation prominent, lateral veins spreading, oblique, intramarginal 

 vein removed from the edge. Flowers large, generally occurring in threes, in 

 the axils of the leaves, sessile or on wr\ short thick pedicels. Calyx tube 

 broadly turbinate, thick woody, nunc or less ribbed and rugose or \\ ;i 1 1 \ mi 

 nearly smooth, .', to | inch diameter; operculum flattened, surmounted l>\ .1 

 thick centre, warty. A smooth secondary operculum is often found in this 

 spec i 1 :s. 



Fruit. Hemispherical or cup shaped, 

 tuberc date, and strongly ribbed ; 

 rim rounded or quite fiat and 

 broad, and a pronounced groove 

 below the edge; valves short, 

 depressed or exserted .... 

 rp to •',' inch long and I inch 

 in diameter or mi >i 1 



. 1 fruit easily distinguished /'nun any other of the genus. 

 I small, smooth fruited form that has a wide distri- 

 bution, and seed distributed abroad, is not E. t globulus 

 but E. St. fohni, R.T.B. 



Habitat. Occurs in isolated patches on the southern hali oi 

 the 1 ".1-1 range of New South Wales; Tasmania; 

 Victi hi,i. 



REMARKS \<> spei es of J ucalypl 1 » ived so much attentioi . both trom botanists and chemists, 



as this particular tree Mueller devotes several pages to it in his 2 ■ i i and a his figure of the species 



llent, it is reproduced here. I Lai i whiti ream-coloured flowers, the warted sessile fruits, the two 



opercula, the squan iranchle! and thi ;laucou essile abnormal lea' ill characteristii features It is one 



of the Tasmania] • ■ d occur on iland of Australia, and has a fairly wide distribution in the 



sou tli -eastern parts extend ■ north in this State as Mount Coi Igy. Hie tree is a very rapid growei 



and for this reason i ei ' irnia and South Africa, where timber i in very great r< esl 

 id fuel rhi wood is pale-coloured, fairly hard, easilj worked but difficull to season Its 

 u , ,- in 1 1 patch; ad i not much used for oil distillation [t has been extensively planted in 

 ia and in Europi md the oil from the formei locality enters into i petition with the Australian product. 



ESSENTIAL OIL. Leaves and terminal branchlets for distillation were 

 obtained trom Jenolan, N.S.W., in August, r.900. The yield of oil was 0-92 per 

 cenl The crude oil was but little coloured, and had the characteristic odour 

 of all those belonging to the richer cineol-pinene class of the "Gum" group of 

 Eucalypts. The oil was rich in cineol, contained some pinene, but phellandrene 

 was absent. Rudesmol was detected in very small amount in the higher boiling 

 portions, and thi ;< |uiterpene was also present in the oil boiling above 260 C. 



The crude oil had specific gravity at 15 C. 0-913; rotation a D + 8-4° ; 

 refractive index at io ['4663, and was soluble in 1 .'. volumes 70 pei cent, 



alcohol. The saponification number foi the esters and free acid was 2-1. 



