257 



the operculum is more or less pointed at the top, and thus assuming a somewhat 

 conical shape; up to seven or eight flowers in the umbel, peduncles flattened. 



Fruit. Shining, nearly globular, urceolate in 

 young fruit, the neck being almost lost in 

 the mature fruit ; rim sharp ; valves usually 

 five and very depressed; usually 5 lines in 

 diameter, or a little less. 



Care is required not to confound the fruits with those 

 of E. stricta and E. obtusiflora or even E. maculata. 



Habitat. Mountains in the Clyde district, Tantawanglo, Milton, 

 N.S.W. 



REMARKS. -The affinity of this species in the herbarium is closest with E. obtusiflora and E. stricta. It 

 differs conspicuously from these in being a large tree. Morphology is of little or no assistance in determining this 

 species, for the dried material is almost identical with those species, but the two are malices and the other a tree. 

 It is a suitable tree for temperate climates. The fruits are sometimes not very dissimilar in shape to those of E. 

 maculaia. 



ESSENTIAL OIL. Leaves and terminal branchlets for distillation were 

 obtained from Monga, N.S.W., in August, 1898. The yield of oil was 0-98 per 

 cent. The crude oil was but slightly coloured, resembling in this respect those 

 of E. dives, E. radiata, &c. The oil consisted largely of phellandrene, and 

 pinene was present in small amount. Cineol occurs, but not more than 5 or 10 

 per cent, in the crude oil. Crystallised eudesmol was detected, and the third 

 fraction contained it in some quantity. The peppermint constituent was also 

 present. The esters were not pronounced. 



The crude oil had specific gravity at 15 C. = 0-8687 '> rotation a D 27-5 ; 

 refractive index at 20 = 1-4851, and was insoluble in 10 volumes 80 per cent! 

 alcohol. The saponification number for the esters and free acid was 3-7. 



On rectification, i per cent, distilled below 172 C. (corr.). -Between 172- 

 J 83. 79 per cent, distilled ; between 183-224, 12 per cent, distilled, and between 

 224-278, 5 per cent, distilled. These fractions gave the following results : 

 First fraction, sp. gr. at 15 C. = 0-8590 ; rotation D - - 31-6. 

 Second ,, ,, ,, = 0-8725 ; a D 26-9. 



Third ,, ,, ,, = 0-9188 ; not taken. 



The third fraction also contained a constituent which had a strong lemon 

 odour, and as an aldehyde was present, it is probable that citral occurs in small 

 amount in the oil of this Eucalypt. 



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

 1919, was again analysed. The specific gravity had increased a little, and the 

 optical activity diminished also. This appears to be due to the alteration in 

 the phellandrene. Perhaps the cineol had also increased a little, but altogether 

 not much alteration had taken place during the twenty-one years the oil had been 

 kept. 81 per cent, distilled below 190 C. 



The crude oil had sp. gr. at 15 C. = 0-8862 ; rotation a D 15-7 ; refractive 



index at 20 = 1-4871. 

 The rectified portion ,, =0-8655; rotation D 26-1 ; refractive 



index at 20 == 1-4811. 



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

 when calculated for the crude oil the result was 17 per cent. As piperitone was 

 present, a ketone determination was made in the rectified portion, with the result 

 that 6 per cent, was absorbed. Thus about 12 per cent, of cineol was present in 

 the oil of this species, 



