60. Eucalyptus cinerea. 



(F.v.M., in B. Fl., iii, p. 239.) 

 Argyle Apple. 



Systematic. A picturesque tree, from 40 to 50 feet high., having a foliage 

 covered with a whitish bloom. Bark whitish brown or reddish, fibrous, thick, 

 extending almost to the branchlets. Leaves opposite, sessile, cordate, ovate, 

 ovate-lanceolate, or lanceolate, on a short petiole; venation generally well 

 marked, oblique, intramarginal vein removed from the edge. Peduncles axillary, 

 flattened or terete, very short, bearing mostly three flowers, sessile or nearly so; 

 calyx obconical, 2 to 3 lines long ; operculum hemispherical, shortly acuminate. 



Fruit. Sessile and hemispherical, or pyriform ; rim 

 thick, domed ; valves short, rarely exserted ; 

 2 to j lines in diameter. 



!' mils are not unlike those o/E. pulverulenta. 



Habitat.- Counties of Camden and Argyle, Lake George, 

 NY\v South Wales; Toongabbie to Walhalla, Victoria. 



REMARKS. Baron von Mueller in his " Eucalyptographia " unites this species with Sim's E. pulver- 

 ulenta, but it is only under a much restricted classification that this would hold, for when seen in their native habitat, 

 no two trees could be more unlike each other than are these two. Bentham, however, agrees with the original 

 author, and separates the species (B.F1. iii, pp. 224, 239). Unfortunately for recent botanical workers, Mueller 

 erroneously figures this particular species (E. cinerea) when illustrating what he considered to be E. pulverulenta 

 (loc. cit.) ', this has led to much confusion, and we ourselves did not discover this fact till late in the research for the 

 first edition. In Mueller's numerous references to E. pulverulenta in his " Eucalyptographia." it is undoubtedly 

 E. cinerea thatis meant, as it is that tree, the " Argyle Apple " which has a reddish, stringy-bark, and a reddish- 

 coloured timber similar to /;. 'Stiiartiana, the " Apple " of Victoria, and Mueller often states that he was inclined 

 to consider these two latter identical. We are of the opinion, from our examination of the material of E. Stuartiana, 

 E. pulverulenta, E. cinerea, and E. Bridgesiana, that they are all good and distinct species. Unfortunately, most 

 of the Eucalyptus vernacular names are misleading, one name being applied to several distinct species, but E. cinerea 

 is an example in which one common name is applied to the one species, and not to several others, so that in this 

 particular instance there can be no mistaking the tree locally, however much the botany may be in doubt. 



ESSENTIAL OIL. Leaves and terminal branchlets for distillation were 

 obtained from Barber's Creek, New South Wales, in January. 1900. The yield 

 of oil was 1-2 per cent. The crude oil was red in colour, and had a pronounced 

 odour of volatile aldehydes. A rather large amount of esters appear always to 

 be present in the oil of this species, consequently it had a tendency to become 

 acid, particularly if rectified by direct distillation under atmospheric pressure. 

 Pinene was always present, varying slightly in amount at different times of the 

 year; but phellandrene was absent. The oil was rich in cineol, and when 

 properly rectified, of good quality for pharmaceutical purposes. The crude oil 

 had usually a high specific gravity, but contained a minimum of high-boiling 

 constituents for an oil of this class, although the ester content was considerable. 

 During the summer the specific gravity of the oil was usually lower than in the 

 winter, as the terpenes of low boiling point are then present in a maximum 

 amount. 



