no 



55, Eucalyptus Seeana. 



(J.H.M., Proc. Linn. Soc., N.S.W., 1904, p. 469.) 

 (Syn. E. tereticornis Sm., var. linear is, R.T.B. & H.G.S., in Euc. and their Ess. Oils, ist Edit., 1902.'* 



Systematic. Abnormal leaves linear, lanceolate, often over 6 inches long, 

 from 3 to 6 lines broad. Flowers pedicellate, almost sessile in some cases. 

 Calyx often angular; opercula, outer one early removed in the budding stage, 

 inner and persistent one conical, acute to ellipsoid, obtuse or shortly acuminate. 



Fruit. Hemispherical ; with a less domed rim than 

 type, and a flange below the edge ; valves 

 opening from below the inner edge of the 

 rim, and more divergent than in the type. 



The fruits are exactly the same shape and size as the 

 type, so that the best feature to distinguish it from its 

 congeners is the bullet-shaped operculum. 



Habitat. Coast districts, New South Wales, and Queensland. 



REMARKS. This variety was founded originally on the distinguishing characters of its abnormal leaves 

 and operculum, timber and oil constituents. The flowers are shortly pedicellate, and the calyx often angled at the 

 base. Being our own variety, it was our intention, as stated by us, to give it specific rank later, but Mr. Maiden, 

 Linn. Soc. N.S.W., Vol. 29, 1904, states when describing E. Seeana that presumably this is E. teriticornis, Sm. 

 var. linearis, Baker and Smith. It certainly is. 



ESSENTIAL OIL. Leaves and terminal branchlets for distillation were 

 obtained from Woodburn, New South Wales, in August, 1900. The yield of 

 oil was 0-78 per cent. The crude oil was red in colour, and had an odour 

 resembling those of the cineol-pinene class. The oil was rich in cineol, contained 

 some pinene, but phellandrene was absent. The amount of high boiling con- 

 stituents was small, and consequently the specific gravity of the rectified oil was 

 not high enough to meet the requirements of the standard as fixed by the British 

 Pharmacopoeia. 



The crude oil had specific gravity at 15 C. --- 0-91 ; rotation a + 5-6; 

 refractive index at 20 = 1-4649, and was soluble in ij volumes 70 per cent, 

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



On rectification 2 per cent, distilled below 165 C. (corr.). Between 

 165-183, 88 per cent, distilled; between 183-243, 8 per cent, distilled. These 

 fractions gave the following results : 



First fraction, sp. gr. at 15 C. : : 0-9076; rotation D + 6-3. 

 Second ,, ,, ,, : 0-9243; ,, +5-6. 



The cineol determined by the phosphoric acid method in the large fraction 

 was 57 per cent. (O.M.), indicating about 52 per cent, in the crude oil. 



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

 1919, was again analysed. It had become much heavier during that time, but 



