54 



REMARKS. From E. Wil/iin--''iiij:iii. K.T.I?, and E. macr<irhycha, F.v.M., it differs in fruit, timber, and 

 chemical constituents of the oil. From the " Stringy liar k," K. ciinn-n. K.T.B., it differs in the shape of the abnormal 

 leaves and chemical constituents of the oil, although the immature fruit of these species is somewhat similar. 

 E. eugenioides, Sieb., and E. capitellatu, Sm., often approach each other closely in morphological characters, and 

 there often seems to be a gradation between the two, but, nevertheless, the two species are quite distinct; and so 

 with this species, although there also appears some similarity in its fruits with those of /:. i-tixfiiinidi'S, yet the two 

 species differ in too many characters to be one and the same species. The abnormal leaves are not unlike those 

 of E. ca/>itclln/(i. whilst the buds are similar to those of E. eu^riiiniiii'.t. If it were not for the distinctive character 

 of the timber, oil, &c., it might, perhaps, stand as a variety of E (, but the former product is of too poor 



a quality to be associated with so excellent a timber as that yielded by the " White Stringybark," K. eiigenioidcs. 

 The oil also differentiates it entirely from that species. 



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 D - 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 a D - 34-3; refractive index 



at 20 = 1*4706. 

 Rectified portion ,, = 0-8706; rotation 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. 



29. Eucalyptus Icevopinea. 



(R.T.B., Proc. Linn. Soc., 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 



