2I( 



ESSENTIAL OIL. Leaves and terminal branchlets for distillation were 

 received from Ourimbah, N.S.W., in September, 1897. The yield of oil was o-6 

 per cent. The crude oil was of an orange-brown colour, and had an odour not at 

 all unlike those o| the " Box " group generally. The oil of this species had a 

 strong resemblance to that of E. punctata var. didyma, and contained aromadendral 

 in some quantity. The constituents present, besides the aromadendral, were 

 pinjene, cineol, cvmene, esters, and the sesquiterpene. Phellandrene was absent. 



The crude oil had specific gravity at 15° C. = 0-9216; rotation a D -- 3-2°; 

 refractive index at 20 = 1-4896, and was soluble in 2 volumes 80 per cent, alcohol. 

 The saponification number for the esters and free acid was 21-4. 



On rectification, 2 per cent, distilled below 172 C. (corr.). Between 

 172-183 , 37 per cent, distilled; between 183-224 , 36 per cent, came over; 

 between 224-250 , 10 per cent, distilled, and between 250-279 , 7 per cent. These 

 fractions gave the following results : — 



First fraction, sp. gr. at 15 C. = 0-8821; rotation a B 4-1°. 



Second „ ,, „ = 0-8847; » 8 - 2 °- 



Third „ „ „ = 0-9559; „ -22-5°. 



Fourth ,, ,, ,, =0-9440; ,, too dark. 



The influence of the aromadendral in the third fraction evidently accounts 

 for its higher specific gravity over that of the fourth fraction. 



The cineol in the crude oil did not exceed 8 or 10 per cent. 



112. Eucalyptus Rudderu 



(J.H.M., in Proc. Linn. Soc, N.S.W., 1904, p. 779.) 

 Red Box. 



Systematic. — A tree reaching 120 feet in height and 2 to 3 feet in diameter, 

 the bark somewhat like the ordinary " Grey Box," E. hemiphloia, (J.H.M.). 

 Leaves lanceolate, acuminate, up to 5 inches long; venation fairly distinct, intra- 

 marginal vein varying in distance from the edge, lateral veins fairly numerous, 

 inclined at 45 to the mid-rib. Inflorescence paniculate, peduncle 4 lines long, 

 with umbels of small flowers. Calyx tube ih lines long, tapering to a pedicel of 

 about equal length ; operculum conoidal. 



Fruit.— Conoid or somewhat pyriform, on slender 

 pedicels ; rim thin ; valves not exserted ; 

 2 lines long and under 2 lines in diameter. 



// is almost impossible to morphologically separate 

 these fruits from those of E. crebra. 



Habitat.— The Coastal districts of New South Wales, but 

 favouring the northern portion. 



REMARKS. — Although the Iruits of this species and E. crebra are practically identical in form, yet (his 

 tree has a " Box " bark and the latter, E. crebra, is an " Ironbark." 



