132 



Indeed, the advent of the mature foliage is often so retarded that it may require careful 

 search to find it, and from some individuals it may be absent altogether. We must, of 

 course, bear in mind that the adult foliage may be found at the very top of a particular 

 tree, and if the tree be of any size, it is quite easy to omit seeing it. 



New South Wales species in which the juvenile foliage is very persistent include 

 E. pawifolia Cambage and E. cinerea F.v.M., E. melanophloia F.v.M., and the one 

 proposed as new in this paper is an addition to a short list. 



I have referred to the subject in another paper* and have quoted a number of 

 species which, bo far as we know, are homoblastic (isoblastic) throughout life. 



The ascertainment, during the last few years, that certain reputed homoblastic 

 species are really heteroblastic, stimulates us to further inquiry in the same direction. 

 Incidentally, it may be remarked that Dr. Diels has proposed the word " helicomorphy : ' 

 to include the two leaf forms in heteroblastic species. 



• " On two new Western Australian species of Eacalyptus," Journ. Nat. Met. and Scfcr.ce Soc, W.A., vol. iii., No. 1. 



