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" those of Van Diem en's Island: and no very large trees of 

 " this genus were seen either on the south coast or in the 

 eequinoctial part of New Holland. Mr. Caley has ob- 

 served within the limits of the colony of Port Jackson 

 nearly 50 species of Eucalyptus, most of which are dis- 

 " tinguished, and have proper names applied to them, by the 

 " native inhabitants, who from differences in the colour, tex- 

 u ture, and scaling of the bark, in the ramification and ge~ 

 " nei"al appearance of these trees, more readily distinguish 

 them than botanists have as yet been able to do. Euca- 

 lyptus, although so generally spread over the whole of 

 " Terra Australis, and so abundant as to form at least four- 

 ** fifths of its forests, is hardly found beyond this country. I 

 ** am acquainted with one exception only, in an additional 

 ** species which is said to be native of Amboyna. 



" Next to Eucalyptus in number, is the beautiful genus 

 *' Melaleuca, of which upwards of 30 Australian species 

 " have already been observed, exclusive of Tristania, Calo- 

 " thamnus, Beaufortia, and an unpublished genus which I 

 ** separate from it. The maximum of Melaleuca exists in 

 " the principal parallel, but it declines less towards the 

 ** south than within the tropic, where its species are chiefly 

 " of that section which gradually passes into Callistemon, a 

 " genus formed of those species of Metrosideros that have 

 " an inflorescence similar to that of Melaleuca, and distinct 

 " elongated filaments. With the exception of 2 species, Me- 

 " laleuca Leucadendron, and M. Cajeputi, the genus Mc- 

 " laleuca appears to be confined to Terra Australis. 



** Leptospermum, of which nearly 30 Australian species 

 " have been observed, exists also in New Zealand and in the 

 " Moluccas. In Terra Australis its maximum is decidedly 

 " in the principal parallel, and like Melaleuca, it is much 

 " more abundant in the southern regions than within the 

 " tropic. 



" B^ckia, to which I refer Imbricaria of Sir J. Smith, 

 " as well as the opposite-leaved Leptospermums, is also an 

 " extensive Australian genus, having its maximum in the 

 " principal parallel, extending like the two former genera to 

 " the highest southern latitude, and hardly existing^ within 

 '* the tropic; one species has however been found in New 

 u Caledonia, as that from which the genus was formed is 

 M a native of China." 



