95 



45. Eucalyptus cornea, 



(H.D. & J.H.M., Proc. Linn. Soc., N.S.W., 1899, p. 612, t. XLVIII, fig. 1-3.) 



A Box. 



Systematic. A tree of medium size, with pendulous branches. Bark of 

 the ordinary ' Box " character, persistent right on to the small branches. 

 Abnormal leaves pale green, not glaucous, broadly ovate; the intramarginal 

 vein considerably distant from the margin, and with the midrib giving the leaf a 

 triplinerved appearance. Normal leaves lanceolate, ultimately narrow-lanceo- 

 late, 4 inches long by % inch broad, varying, however, in length and width ; 

 the intramarginal vein is distinctly removed from the edge of the leaf, although 

 fhis is less marked in the case of narrow leaves, the venation is oblique, but few 

 of these secondary veins are as prominent as the intramarginal vein. The foliage 

 is drooping, and has frequently long stalks. Buds clavate, the calyx tube greatly 

 exceeding the operculum in size ; operculum nearly hemispherical, with a 

 small umbo ; the calyx tube tapering gradually to the common point of attach- 

 ment to the 'stalk. 



Fruit. Narrow, conical (hence the specific name), 

 tapering to the point of attachment of the 

 common stalk ; rim thin ; the valves, which 

 are three or four and very small, are 

 deeply sunk; the greatest length 3 lines by 

 2 lines broad. 



Requires care so as not to confound them with E. 

 Fletcher! or perhaps E. crebra. 



Habitat. Found in the country west of the Dividing Range 

 and its spurs, forming, with E. hemiphloia and E. 

 Woollsiana, the " Box " of the western country, 

 New South Wales. 



REMARKS. Since the original description appeared under the Author's names (lac. cit.), the species has 

 been lowered to varietal rank by Maiden, " Critical Revision " vol. ii, p. 123, under E. Baueriana, Schau., a species 

 founded on leaves and inflorescence only, " in plump bud and expanded flower," J.H.M. loc. cii.' and of tropical origin. 

 Benth.. B.F1. iii, 214. Such material and description is of no practical value these times. As Deane and Maiden 

 accurately describe this tree from material and known locality, it is thus very clear what Eucalyptus is meant, 

 and so we prefer to retain their nomenclature for then there can be no doubt about the basis upon which the 

 botany and chemistry of this work is founded. 



ESSENTIAL OIL. Leaves and terminal branchlets for distillation were 

 obtained from Parkes, New South Wales, in July, 1900. The yield of oil was 

 0-59 per cent. The crude oil was of an orange-brown colour, and had a pronounced 

 odour of volatile aldehydes. Pinene was present in some quantity, and there, 

 was also a fair amount of cineol ; but phellandrene was not detected, and esters 

 only in small amount. It may be that aromadendral was present in small 

 quantity. The higher boiling portion contained the sesquiterpene. 



The crude oil had specific gravity at 15 C. 0.9057 ; rotation D + 5-24; 

 refractive index at 20 = 1-4676, and was soluble in 6 volumes 70 per cent, 

 alcohol. The saponification number was 6-26. 



