77. Eucalyptus parvifolia. 



(R.H.C., Proc. Linn. Soc., N.S.W., 1909, p. 336.) 



Systematic. A small umbrageous tree, usually ,20 to 30 feet in height, 

 bark smooth, grey.- Abnormal leaves ovate-lanceolate, opposite, decussate, under 

 i inch long, paler underneath. Found flowering in opposite leaf stage. Normal 

 leaves linear-lanceolate to lanceolate, crowded, often opposite, under 3 inches 

 long, acuminate, shortly petiolate ; venation not prominent, intramarginal vein 

 somewhat removed from the edge, lateral veins spreading, moderately oblique. 

 Peduncles axillary, i to 2 lines long, with radiating heads of five to seven flowers. 

 Buds sessile ; calyx tube sub-cylindrical, i \ lines long and twice or more than 

 twice as long as the conical operculum. 



Fruit. Globular, truncate, sessile ; rirn thin ; valves 

 not exserted ; 2 lines long and 2 lines in 

 diameter. 



They very closely resemble those of E. stellulata, so 

 that these two trees cannot be separated by their fruits. 



Habitat. Kybean River, Monaro, New South Wales, at an 

 altitude of 3,500 feet. 



REMARKS. This species is primarily separated from its congener E, stellulata by the leaf venation, 

 partly by its bark, and chemical constituents. 



ESSENTIAL OIL. Material of this species for distillation was obtained 

 from Kybean, N.S.W., in December, 1908. 



The yield of oil was 0-7 per cent. The crude oil was of an amber colour, 

 and had an odour resembling the cineol-pinene oils. It was rich in cineol, 

 contained pinene, but phellandrene was absent. The small amount of ester was 

 probably geranyl-acetate. The first distillate contained the volatile aldehydes 

 valeraldehyde and butaldehyde. The oil is a good one of the cineol class, and it 

 is unfortunate that the yield is not greater. The rectified oil was yellowish in 

 tint, due to the influence of the particular phenol present ; this colour is 

 characteristic of the oils of the typical " Gums." 



The crude oil had specific gravity at 15 C. = 0-9177; rotation a u + 3-6; 

 refractive index at 20 = 1-4644, and\vas soluble in i-.2 volumes 70 per cent, 

 alcohol. The saponification number for the esters and free acid was 5-6. 



On rectification, 2 per cent, distilled below 169 C. (corr.). Between 

 169-193, 93 per cent, distilled, and between 230^240, 2 per cent, distilled. These 

 fractions gave the following results : 



First fraction, sp. gr. at 15 C. = 0-9155 ; rotation a D + 3-5; refractive index 



at 20 = 1-4617. 



Second fraction = 0-9285 ; rotation dextro-rotatory ; refractive 



index at 20 = 1-4781. 



The cineol, determined by the phosphoric acid method, was 69 per cent, 

 in the crude oil (O.M.). 



It is very probable that the higher boiling portion contained the liquid 

 form of eudesmol, particularly as it was dextro-rotatory, and no crystalline body 

 was detected. 



