Vol. XXVIII 



1911 



] St. John, Notes on the " River White Guy 



81 



Leaves, mature. — 



E. amy^dalina. — Linear to broadly- 

 lanceolar straight or falcate, 2 

 to 4 inches long. 



E. radiata. — Thin, narrow to broad- 

 lanceolar, grey-green in the 

 young trees. 



"Juvenile" or "Slicker" Leaves.- 



E. amygdaliiia. — They are oppo- 

 site, narrow-lanceolar, sessile, 

 of a light ereen colour. 



Venation. — 



E. amygdalina, venation prom- 

 inent ; lateral veins very ob- 

 lique, long spreading ; intra- 

 marginal veins removed from 

 the edges. 



E. radiata are opposite, often 

 whorled, narrow-lanceolar, ses- 

 sile, and in seedlings the under 

 surface is coloured purple (E. 

 purpurascens. Link.) ; the young 

 stems have a rusty-glandular 

 appearance. 



E. radiata indistinct ; lateral veins 

 longitudinal ; intramarginal vein 

 considerably removed from the 

 outer margin. 



Flowers. — 



Small in both species ; stamens under 2 lines long, inflected in bud, with 

 small anthers. 



Operculum. — 



Hemispherical, shorter than the 

 calyx-tube, very obtuse in E. 

 amygdalina. 



Buds. — 



E. amygdalina are clavate or club- 

 shaped, sometimes glandular. 



Fruits. — 



E. amygdalina are sub-globose- 

 truncate, under 3 lines in dia- 

 meter, contracted at the orifice ; 

 rim flat or slightly concave, 

 shortly pedunculate and pedi- 

 cellate to nearly sessile. 



E. radiata Hemispherical, pointed, 



shorter than the calyx-tube. 



E. radiata are pointed and more 

 numerous, up to 40 or more 

 being present in the umbels. 



E. radiata, ovate-truncate on a 

 long peduncle, with filiform 

 pedicels, uniform in size, 2 to 

 2y lines in diameter, pilular or 

 pear-shaped. 



Oils. — The oil obtained from E. radiata bears a greater re- 

 semblance to that obtained from E. dives than it does to the 

 oil from E. amygdalina. the only difference between the two 

 former being that the oil of E. radiata contains the greater 

 amount of pinene. The oil of E. amygdalina differs from 

 both the others in containing less phellandrene, pinene, and 

 peppermint constituent, but more cineol (eucalyptol). The 

 properties of all these oils have been examined by Baker and 

 Smith,* and may be tabulated as follows : — 



* " Research on the Eucalypts." 



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