77 



33. Eucalyptus Lehmanni. 



Preiss Herb., according to Schau., in PI. Preiss, Vol. [, p. 127, 1845.) 



Systematic. A tall shrub or small tree, with a roughish, reddish bark 

 coming off in irregular sheets Oldfield . Abnormal leaves orbicular to oval, 

 small, thin, petiolate. Normal leaves oblong-ovate to broad lanceolate, aboul 

 z\ inches long, obtuse, very thick, intramarginal vein removed from the edge, 

 lateral veins verj oblique. Flowers often twenty or nunc in dense heads on 

 thick recurved, sometimes flattened peduncles, 1 to 3 inches long. Calyx tube 2 

 to 3 lines in diameter, more or less sunk in the re< eptai le ; operculum cylindrical, 

 dilated at the base, obtuse, up to i! inch long. 



Fruit. Numerous, ailuatein a cluster of twelve 

 to twenty, and well sunk in the re< ep 

 tacle ; symmetry lost by compression ; 

 valves well exserted, wrinkled, acumi- 

 nate, with openings between each 

 valve, and comment into a promi- 

 nent cone, tapering into the persistent 

 elevated base of the style ; rim very 

 narrow; about 7 lines in diameter. 



These arc easily separated from E. cornuta 

 by the absence of the receptacle enclosing the 

 of the adnate fruits. The figure by Hooker. B 

 Mag. 6140, under E. cornuta, is this species. 



Habitat. Western Australia. 



ESSENTIAL OIL. Material oi this species was collected from cultivated 

 trees grown at the WVrribee Sewage harm, Victoria, in September, 1916. The 



oil was distilled by Mr. P. R. H. St. John, at Melbourne, who submitted it to us 

 for investigation. The yield of oil he obtained from leaves and terminal branchlets 

 was equal to o-86 per cent. Mr. St. John states that no sewage matter was 

 near the trees. 



During the hist hour 60 pet" cent, of the whole oil distilled; for the 

 second hour 23 per 1 ent. distilled, for the third and fourth hours 14 per cent., and 

 lor the tilth hour 3 per cent. 



The crude oil was oi a light lemon colour, and the odour gave a strong 

 indication ol the presence oi valeraldehyde and butaldehyde. Pinene was the 

 chiei terpeiie, and phellandrene was absent. Cineol was present in fair quantity 

 only. The crude oil was turbid when received, and did not clear on standing 

 for some months; in this peculiarity it resembled that oi E. microcorys. Only a 

 small amount ot ester was present. 



The crude oil had specific gravity ai 15 C. 0-8964; rotation a B + 17-5°; 

 refrai tive index ,it 20 = 1-4653, and was soluble in 1 volume 80 per cent, alcohol, 

 The s.ip.mitK ation number lor the esters and free a. id was 11-7. 



