

14. Eucalyptus acaciceformis. 



Ill' & I II M . Proc I inn — . Vs \\ . i 599, p. 1 

 Peppermint. 



Systematic. A large umbrageous tree attaining diameter, 



with a " Pepper mint " bark. Abnormal h ilternati oloured, lanceolate, 



usually obtuse, margin crenulate, averagi ;ize aboul 1 inch. Normal 



leaves lanceolate, average size 2| inches by^ inch; intramarginal vein removed 

 from the edge ; lateral veins parallel, .it an angle oi about 15° from mid rib 

 Peduncles short 1 line, angular; bearing >i\ or seven flowers in the head. 

 Calyx tube short ; operculum about the same length as the cal} \. shortly pointed. 



Fruit. Almost -.essile, hemispherical ; rim narrow, v ^l/\ 



truncate or slightly domed ; valves scarcely ' "}"■* 



exserted; 2 Unes broad and 1 £ lines long. ^» 



fruits bear a great resemblance to those of 

 E. Macarthuri, so that the two species cannot be 

 separated mi the fruits alone. 



Habitat.- New England district, New South Wale-. 



REMARKS. Ill authors, when des< ribing ibis species, speak of tin; bark ;i- " Pepperminl 



and furrowed." Iltl ect, then on a cortical classification it won! difficult to place it in any of the 



groups of tin- Genus. However, to us it seems to approach m oi the ' Peppermint" ;roup in 



texture. It is oneoi the numerous so-called " I oi the New I Qgland Tablel 



ESSENTIAL OIL. — Leaves and terminal branchlets for distillation were 

 obtained from Tenterfield in January 1910. The material was collected 



for commercial distillation, SO that the yield is an average one. The crude ml 

 was red in colour, very mobile, and h.nl a rank, turpentine-like odour. It 

 consisted principally ot dextro-rotato.v pineiie, and the sesquiterpene. Phel- 

 landrene could not be detei ted, and cineol was onl} presenl in a very -mall 

 amount. The ester was somewhat large for an oil "I this class, and apparently 

 consisted principally ot geranyl-acetate. In it> general characters the nil <>! 

 this species ha- resemblance to that oi / n va-anglica, although the larger amount 

 of dextro-rotatory pinene with a very high rotation , the less yield oi oil, higher 

 ester content, lower specifi gravity, and the small quantitj oi the sesquiterpene, 

 all show it to differ from the nil ot that species. I he following results were 

 obtained with the crude oil : 



Yield o| oil per cent. ... ... ... ... - 0'2 



Specific gravit} at 15 C. ... ... ... ••• = 0-8864 



Rotation a D ... + 357°- 



Refi active index at _-<. I ... ... ... = i"47> V 



Insoluble in 10 \ ols. No per cent. al< "hoi. 

 II,, saponification number for the esters and fre< acid was \~- \. while in 



the cold with two hours' tact it was 1 *>•_>. 



This result shows th< to be principally geranyl acetate, so that, from 



the cold -.ipuiniw.it , the 'a! contained 57 pei "in. oi thai ester, 



