BY HENRY DEANE. 585 



Wavy and reaching margin Q. stellata. 



,, ,, ,, Q. coccinea. 



,, ,, „ Q. pedunculata. 



Curved and reaching margins Q. oxyodon. 



,, ,, „ Q. alnifolia. 



Curved and reaching the next above Q. amherstiana. 



,, ,, ,, ,, Q. philippinensis. 



Curved and indistinct towards margin Q. elliptic//. 



Q. Phellos. 



Irregular and indistinct Q. virens. 



Tertiary Veins — 



At right angles to secondary, or nearly so Q. castanecefolia. 



,, ,, ,, ,, Q. oxyodon. 



,, ,, ,, ,, Q. amherstiana. 



,, ,, ,, ,, Q. Libani. 



,, ,, ,, ,, Q. Prinos. 



,, „ ,, ,, Q. Xalaptc. 



„ ,, ,, ,, Q. pubescens. 



,, ,, ,, „ Q. montana. 



,, ,, ,, ,, Q. alnifolia. 



,, ,, ,, „ Q. suber. 



At right angles to midrib Q. philippinensis. 



,, „ ,, Q. lancifolia. 



Reticulate, but more or less arranged in lines ... Q. sessih [flora. 



Coarsely reticulate Q. stellata. 



,, ,, Q. coccinea. 



More finely reticulate Q. oloides. 



„ ,, Q. pseudococcifera. 



Q. Phellos. 



In Plate xxxvi. I give some illustrations of leaves of the genus 

 Eucalyptus, showing the remarkable variation in structure 

 existing in the leaves of different species. Probably there are 

 few people in Australia who would not express themselves sure 

 of recognising a " gum tree " leaf when they saw it; they might 

 even feel themselves insulted if doubt were expressed as to their 

 power of doing so, and yet it is quite clear they could not express 

 off-hand their idea of the typical Eucalyptus leaf. It may be a sur- 

 prise to many to find on what different plans the vein system of the 

 leaves of different species is arranged, and how impossible it is to 

 38 



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