SYNONYMS. 



1. Leptospermum umbellatum Gsertner, de Fruetibus, &c, i, 174, 



tab. xxxv. 



2. Metrosidei'OS salicifolia Solander (fide Gsertner); non Gsertner. 



3. E. populifolia Desf. probably. 



4. E. subulata A. Cimn., Schauer in Walp. Rep. ii, 924. 



5. E. insulana F. M. Bailey. 



3. E. populifolia Desf. 



(a) Following is the original description :— 



Eucalyptus 'populifolia. — Eamis lsevibus; foliis petiolatis, alternis, cordato-orbiculatis, muticis et 

 mucronulatis. 



Faciea E. cordati Labillardiere ; differt foliis petiolatis. Non floruit. Desf. {Cat. PI. Hort. Par, 

 ed. 3, 1829, p. 408.) 



(b) It is next referred to in Walper's Repertorium ii, 927. 



(c) Mueller refers to the name : — 



" Eucalyptus populnea (E. populifolia Hook, in Mitch. Trop. Austral, p. 204, non 

 Desfont.) (Journ. Linn. Soc. iii, 93). 



(d) Mueller again refers to E. populifolia Desfont. in " Eucalyptographia " 

 under E. populifolia. 



In the journal above quoted (Journ. Linn. Soc. iii, 93), " I had changed the name of this species 

 (E. populifolia, Hook.) to E. populnea, as Desfontaines had mentioned (Catal. Hort. Paris, 1829, p. 408), 

 already an Eucalyptus under precisely the same name employed by Hooker." (See Vol. iii, p. 93, of the 

 present work.) 



(e) Bentham (B. Fl. iii, 200) includes E. populifolia Desf. in a list of species he 

 recommends to be entirely discarded. But our knowledge of individual species has 

 advanced since then. 



(/) Mr. James Britten, then of the Department of Botany of the British Museum, 

 entered into correspondence with me on the subject early in 1900. 



(</) In 1902 I received from the Vienna herbarium a twig, in juvenile foliage, 

 labelled. — 



"Eucalyptus populifolia Hort. Celsian. Ex horto dom. Cels. Parish's 1820 sub. 

 nom. indie, et E. aromatica'" 1 



I understand this is Desfontaines' species, and it is E. tereticornis Sm. or close to 

 it. This is as much as I can say, and I place the statement on record for what it is 

 worth. In a few years I confidently expect that the determination of a species of 

 Eucalyptus from a twig of juvenile foliage will present no difficulty. 



