

1. Eucalyptus calophylla. 



(R.Br., in Journal p 



Red Gum. 



Systematic. One oi the largest trees oi Western Australia, with .1 

 rough bark, shorthj fibred, and irregularly furrowed and broken. Leaves 

 ovate-lanceolate, shortly acuminate; the venation distinct, lateral vein 

 nearly transverse and close!) parallel, the intramarginal vein almost touching 

 the edge, ["he flowers, red or white, form .1 terminal corymb or panicle, and 

 arc comparatively lai The calyx is pear-shaped, about \ inch long; the 



operculum being quite depressed. 



*Fruit. Large, on a pedicel nearly 1 inch long, 

 urn shaped, occasionally ribbed, 

 tracted at the orifice , rim well counter- 

 sunk; valves deeply sunk; aboul i\ inch 

 long and i inch broad. 



This fruit is typical in shape of the "Blot 

 ami probably the largest of that section, the ■ 

 differentiating it from its congeners, except, perhaps, 

 E. Planchoniana and E, ficifolia, both of which it 

 closely resemb 



Habitat. Western Australia. 



ESSENTIAL OIL. Leaves and terminal branchlets for oil distillati 

 were forwarded to the Museum from the Darling Range, Western Australia, by 

 the Agricultural Department oi that state, and the results were published in the 

 Pharmaceutical Journal, September, 11,05. Tin yield oi oil was 0-25 per cent 

 1 he crude oil was of a dark red colour, and had a turpentine-like odour, with 

 little resemblance to that of ordinary Eucalyptus oils. It consisted largelj oi 

 pinene, which was mostly dextro-rotatory. The third fraction contained a 

 considerable amount of cymene, judged by the odour and physical properties. 

 Cymene has been proved to occur in the oils belonging to this class oi I ucalypts, 

 but sufficient of this oil could not be spared to provide chemical proof. The 

 sesquiterpene occurs in considerable amount, ,1- proved l>\ thi reactions, and 

 10 per cent, of the oil distilled above 245 C. Phellandrene was not detected, 

 and cineol only in trace-, in the portion distilling about r.76 C. Constituents 



boiling between [85 and 245 C. were practically absent, as only t\\ three 



diops came over between those temperatures, so that aromadendral and 

 piperitone do noi occur. The comparative insolubility in alcohol also showed 

 the oil to contain a large excess oi terpenes. The dark colour oi the oil was 

 readihj removed by agitating with dilute aqueous soda. The esters easily 

 saponified in the cold, while at a high temperature they decomposed; the 

 prim ipal ester was evident 1- l-acetate 



* I he illu .ill drawn icwhat 



I. nt 1 h mr will b 



