54 



REMARKS, i rom E. fl R I B md F.y M . i1 differs in fruit, timber, ;itul 



oil From the " Stringybark," £ R C.B., it differs in the shape of the abnormal 



mstituents ol the oil, although the immature fruil oi thi somewhat similar. 



Jieb and I i apitellata, Sm., often approach each othei closel) in morphological characters and 



then m o b i radation between the two, but, nevertheless, the two specie are quite distinct; and so 



with ! ' ugh 1 al nilarity in its fruits with t hose of £ yet the two 



aracters to be one and thi The abnormal leaves are not unlike those 



of £ whilst the bud are similar to thosi ii Hit were not for the distinctive charai tei 



of the timber, o might, pet nd as a variety oi I. but the former product is oi too i i 



lalitj to be associated with so excellent a timbei .is that yielded by the " White Stringybark," /. »■ . nioides. 

 oil also differ m ia tes it entirel) from thai sp< 



ESSENTIAL OIL. —Leaves and terminal branchlets for distillation were 

 obtained from Woodburn, N.S.W., in August, 1900. The yield of oil was 0-04 

 per cent. The crude oil was of an amber colour, and had an odour corresponding 

 to that of the pinene terpene oils. Cineol was detected, but there was not more 

 than 5 to 10 per cent, of that constituent in the crude oil. Laevo-rotatory 

 pinene was present in considerable quantity, but phellandrene was absent. 

 The specific gravity of the crude oil at 15 C. = 0-8744, and the optical 

 rotation a - - 34 . The saponification number for the esters and free acid 

 was 7-2. The crude oil did not form a clear solution with 10 volumes 80 per 

 cent, alcohol. 



The above sample of oil had been stored in the dark, and in September, 

 1919, was again analysed. Practically no alteration had taken place in the oil 

 during the nineteen years it had been kept, and it thus follows the rule for the 

 pinene Eucalyptus oils generally — 90 per cent, distilled below 190 C. The 

 crude oil and the rectified portion gave the following results : — 



Crude oil, sp. gr. at 15 C. = 0-8770; rotation «„ -- 34-3°; refractive index 



at 20 = 1-4706. 

 Rectified portion ,, = 0-8706; rotation a D - 38-6°; refractive index 



at 20 = 1-4669. 

 The cineol was determined by the resorcinol method in the rectified portion ; 

 when calculated for the crude oil the result was n per cent. 



19. Eucalyptus Icevopinea. 



(R.T.B., Proc. Linn. Sue. N.S.W., 1898, p. 414, t. X.) 

 Silver-top Stringybark. 



Systematic. A very tall tree in favourable situations. Bark fibrous, but 

 brittle, a feature that distinguishes it from that of " Red Stringybark," E. 

 macrorhyncha, F.v.M., and "White Stringybark," E. eugenioides, Sieb. ; ultimate 

 branches smooth. Abnormal leaves alternate or scarcely opposite, broad at 

 the base, but not cordate, acuminate, about 3 inches long; the intramarginal 

 vein removed from the edge, the lateral ones very distinct on the under side, 

 but scarcely showing on the upper surface. Normal leaves varying in size and 

 shape, mostly very oblique, of a very dark green colour, and shining on both 

 sides, lanceolate, falcate, acuminate; the intramarginal vein removed from the 



