BY E. C. ANDREWS. 561 



An examination of the several distinct groups of Eucalypts 

 living in different soils, in different climates, and possessing 

 leaves, barks, inflorescences, and anthers strikingly dissimilar in 

 character, suggests that here, probably, several genera have been 

 grouped together, groups apparently quite as distinct from each 

 other as Beaufortia, Reyelia, Melaleuca and Callistemon, or as 

 Leptospermum and Kunzea, or as Kunzea and Bcechea. Thus E. 

 tetrodonta, E. erythrocorys, E. eudesmioides, E. tetragona, and E. 

 odontocarpa, with their 4-toothed calyces, their stamens more or 

 less united into four clusters, their 3-flowered peduncles, their 

 leaves opposite, and their very limited geographical range, might 

 well be restored to generic rank as Eudesmia. In the writer's 

 opinion, this appears to be but just to Robert Brown. 



The work of Bentham, followed up by that of von Mueller and 

 Maiden, the edaphic studies of Cambage, and the oil-studies by 

 Baker and Smith have shown conclusively that the Section 

 Corymbosse is the oldest, and the Peppermint-section* the 

 youngest, nevertheless the intermediate forms have vanished, 

 and it may be shown, on morphological and geographical grounds, 

 that the types which, at first sight, apparently show connection 

 between the groups, are really only aberrant or specialised forms 

 of much later origin. 



The name Eucalyptus was proposed by l'Heritier for a genus, 

 of which the present E. obliqua is the type. This type is in- 

 cluded by Bentham in his Section Renantherse under Eucalyptus. 

 The group appears to be easily divisible into the Stringy barks, 

 Peppermints, Mountain- Ashes, and their specialised forms, the 

 Sallies, the Tallow-wood, etc. Of these, the Stringybarks, in part 

 at least, appear to be the older members. The name Eucalyptus 

 might be reserved for these plants. As already mentioned, they 

 possess reniform anthers, a tendency to arrange the secondary 

 leaf- veins parallel to the midrib, they possess varying quantities of 

 phellandrene and piperitone oils, and they are confined to South- 

 eastern Australia, a region of rugged and well watered topo- 

 graphy. The types include forms such as E. Delegetensis, E. 



* Certain desert-types also appear to be fairly youthful. 



