BY E C. ANDREWS. 563 



more striking instances of this feature (namely, rejection of the 

 primitive thick, and more or less corky bark) in the case of the 

 true Eucalypts. 



Another Eastern Australian group may be raised to generic 

 rank, under the name of Poranthera. This includes the Boxes 

 and Ironbarks, whose special features have been considered else- 

 where. These, among others, include K. albens, E. hemiphloia, 

 E. odorata, E. Woollsiana, E. microtheca, E. polyanthemos, E. 

 popidifolia, E. conica, E. crebra, E. Cayleyi, and E. siderophloia. 

 Aberrant or specialised forms (widely separated from the primi- 

 tive Corymbosa, on the one hand, and the younger Eucalypt, on 

 the other hand) include E. melliodora, E. Bosistoana, E. panicu- 

 lata, E. leucoxylon, E. Behriana, E. uncinata, and E. gracilis. 

 This genus is divisible, again, into Boxes, Ironbarks, and certain 

 Mallees. The bark here becomes a powerful aid in classification. 

 Connecting links with the earlier forms possibly are to be found 

 in E. pruinosa and E. melanoxylon. 



The remaining types fall into groups to which the name 

 Parallelanthera may be applied. Members of this Section are to 

 be found in all parts of Australia; representatives are to be 

 found in the deserts, others in the moisture-laden coastal ravines, 

 others in the hot north, others on the exposed subalpine plateaus. 



They represent, with the exception of Eudesmia, Eucalyptus, 

 Poranthera, and Corymbosa, all the forms possessing caps to the 

 unexpanded flower. With the knowledge of this wide geographical 

 range, the variety of climates, the oft-changing topography, and 

 the long time-factor involved, to which the earlier forms of this 

 Section were subjected, it is not strange that members of the 

 same should have proved a veritable puzzle to systematists. It 

 is as if representatives of the earlier types had penetrated into 

 remote corners of the continent, and then being cut off later 

 from intercommunication, they had become more and more 

 specialised, yet not so markedly as to have given rise to new 

 genera. A few examples will suffice to establish this point. E. 

 globulus, E. goniocalyx, E.Cambagei, E. Maideui, E.Nova-Anglica, 

 E. viminalis, E. cinerea, E. pulvigera, E. cordata and similar 

 types, have developed in abundance of moisture and shade, with 



