1278 ON KINGS AS AN AID IN THE DIAGNOSIS OF EUCALYPTS, 



It is interesting to observe that the first four on the list are 

 *' Ironbarks," — a very natural group. In what relation do the 

 other three species stand to this group and to each other 1 Fol- 

 lowing is Bentham's classification of the seven species : — 



Heteeostemones. ^ leucoxylon. 



{ 



imniculata. 

 PoRANTHERiE sicleroj^Moia. 



MlCRANTHER^ i ''■'^'^^^P'^^i''- 



[ crehra. 

 „ , . / rohusta. 



NORMALES. I )^^j^^^J,^. \ ^«%'^«- 



\ resmifera. 



In the above classification the Ironbarks are spread over two, or 

 three, series. 



In Mueller's anthereal classification the Ironbarks are spread 

 over two groups, while in the same author's cortical system they 

 naturally come together in Schizophloise.* Also, in Bentham's 

 classification, E. resinifera^ E. rohusta and E. saligria come together 

 under the Normales, and likewise under the Baron's Parallel- 

 anther?e, but they are separated in the cortical system, E. saligiia 

 falling under Leiophloioe, and E. rohusta and E. resinifera under 

 the Bhytiphloise. 



It is interesting to find that the undoubted affinities of the Iron- 

 barks extend to their Kinos, and that the affinities of E. rohusta, E. 

 resinifera, and E. saligna as regards their anthers (especially 

 strong between the latter two), receive collateral proof in regard 

 to their Kinos. The affinities of E. rohusta and E. resinifera are 

 also referred to in Decade vii of Mueller's Eucalyptograjihia ; E, 

 punctata Kino contains no gum (falling in the Turbid group) ; 

 this emphasises the undoubted difi*erence between E. resinifera and 

 that species. • 



Mem. : E. rohusta, E. saligna, and E. resinifera all have red 

 timbers, which is an affinity, shared, however, with other species. 



* The Schizophloias is not, however, a perfect classification. I have seen 

 bark of E. stellulata, for instance, which cannot be distinguished from what 

 are generally known as "Ironbarks." 



