162 A. R. PENFOLD. 
THE ESSENTIAL OILS OF TWO LEPTOSPERMUMS. 
By A. R. PENFOLD, F.C.S. 
Economic Chemist, Technological Museum, Sydney. 

[ Read before the Royal Society of N. S. Wales, October 4, 1922. } 
SomE time ago, Mr. EH. Cheel of the National Herbarium, 
Sydney, kindly directed my attention to the advisability 
of examining the essential oils about to be detailed. I am 
much indebted to him for furnishing me with the names of 
suitable localities and for authentic specimens to enable 
sufficient material to be procured for oil distillation. My 
thanks are likewise due to him for his particularly gener- 
ous action in allowing me to include the original description 
of a new variety (L. flavescens var. leptophyllum, Cheel) in 
order to facilitate the publication of the chemistry of the 
oils. 
LEPTOSPERMUM FLAVESCENS var. MICROPHYLLUM. 
This variety has already been described by Bentham, 
Flora Aust., Vol. iii, p. 105. It is a tall graceful shrub 
varying from about 4 to 12 feet in height and much resem- 
bling L. flavescens, Smith. In factitis the northern form . 
of that species, being common in the northern parts of New 
South Wales and Queensland. Leaves and terminal branch- 
lets for this investigation were obtained from Fraser Island, 
Queensland, through the courtesy of the Director of Forests 
of that State, who also kindly furnished the following 
information in regard to its habitat:—‘‘this plant reaches 
its best on dry hard flats adjacent to running water. It 
does not grow at all on the loose sand on hillsides, and 
although sometimes found on swampy wet ground it does 
not appear as healthy as when growing in the firm sand 
found on dry flats here.”’ 

