265 



The above oils were mixed together and stored in the dark ai 

 iwiw. twenty-one years afterwards, the oil was again analysed. Nol much 

 alteration had taken place during all thai time, as the figures below will show, and 

 the reaction Eoi phellandrene was jusl a pronounced as formerly. 66 pi 

 distilled belou [90 C. rhe crude oil and the rectified portion gave the following 

 results : — 



Crude oil, sp. gr. at 15 C. 0-8945; rotation a B + r-o ; refractive index 



20 = 1-4904. 

 Rectified portion ,, =0-8624; rotations 14-2 ; refractive index 



20 1-4801. 

 The cineol was determined bj the resorcinol method in the recti lied portion ; 

 when calculated for the crude oil the resuH was 11 percent. 



144. Eucalyptus obliqua. 



(L'Her., in Serl Angl. t8, t 20.) 

 1 1 [00k. 1. ; /-.. falcifolia, Miq. ; E 1 1 sa, i \ M 

 Stringybark. 



Systematic, One of the largest trees on the Australian continent and in 

 Tasmania. Bark stringy, and not to be distinguished from that of other 

 Eucalypts to be found in thai cortical class of Eucalypts. Abnormal leaves 

 oblique, oval to o\;ur kun'eol.i.tr, shortly acuminate, petiolate, pale-coloured 

 underneath, shining on the upper surface; venation distinct. Normal leaves 

 huiceolate, hdciue, oblicpie, measuring from 6 to 10 inches long and 1 inch to over 

 2 inches wide: venation distinct, lateral veins often very oblique, intramarginal 

 veins removed from the edges. Peduni les axillary, about 12 lines long, flattened, 

 bearing numerous flowers. Calyx tube conical, from 1 to 2 lines in diameter, 

 tapering to a short pedicel ; operculum hemispherical, acuminate. 



Fruit. Urn-shaped, or pyriform to hemispherical, 



variable as to size, shortly pedicellate, t^'%. 

 contracted at the rim, which is thin and 

 countersunk; valves not exserted; some- 

 times over '1 lines long and 4 lines wide. 



The pear-shaped fruit much resembles that of E. Dele- 

 gatensis, and the hemispherical Unit of E. regnans. 

 Its connection with K. ^i^.mt.M. Honk. /., is fully 

 . ith in our paper on Tasmanian Em dypts and 

 their Essential oils, Roy. Sue. Tas., [912. 



Habitat. Tableland from Queensland into Victoria a1 high 

 elevations ; South Australia : Tasmania, 



REMARKS, ["his tree was tl Eucalyp i known to cienci and i1 was on this species that 



nus was founded bj L'Heritier. ITh original specimen l Tasmania but i\ i tensive 



arc as in and in the New South Wa Coa I I lotanical and chemical charactei 



throughout this exten It derives its specific nami from the unequal halves of it leaves but this is not a 



Eucalypts have thi feature h much re- 



I i 1 1 i . i 1 1 \ 



!■ i ' ! ertheli in the field it is easily distingui tied from 



broad and rich gi ! and byth fact that th persisl at barl lit out 



to the branchlets, which is nol in the two 



50068— S 



^r 



