97 



3. With E. siderophloia, Benth., var. glauca, Deane and Maiden. 



U. Caleyi certainly presents some resemblance to this variety. Both forms 

 are glaucous, and the juvenile foliage of both forms has much in common, but the 

 opercula of the var. of E. siderophloia are not constricted, while its valves are not 

 only not sunk, but they are exserted. 



4. With E. paniculata, Sm. 



E. Caleyi was by Mueller aad others sometimes labelled E. paniculata, with 

 bud and flower specimens alone available. The inflorescence often, indeed, takes on 

 a paniculate character, and the fruit, when imripe and the rim not defined, is 

 certainly reminiscent of that of E. paniculata, but the leaves, ripe fruits, and timber 

 sharply distinguish the species. 



HYBRIDISM. 



Mr. J. E. Carne collected this species at Copeton, with a Box-bark, very 

 different in appearance to that of the normal species. I will describe this specimen 

 when I deal with the subject of hybridism in the genus. Ironbarks seem specially 

 prone to hybridise with the Boxes ; and I cannot usefully describe the various 

 hybrids without pictorial illustrations, which are being prepared. 



Hybridism in Eucalyptus is a scientific fact, although a few of the instances 

 adduced may still form the subject of controversy. 



After I have critically revised the various species of Eucalyptus in the way I 

 am doing, and before I publish my diagrams and tables explaining my views as to 

 their afiinities, I propose to devote a Part of this work to the hybrid forms, and shall 

 at all times be grateful to correspondents for specimens illustrating the phenomenon, 

 or believed to do so. 



Explanation of Plates (53-56). 

 PLATE 53. 



/;'. Ravervliann, F.v.M. ' 



Irt and ib. .Juvenile foliage. Rockliampton, Queensland. (J.H.M.) 



%L Leaf in intermediate stage ; 2b, fruits received by Mr. F. M. Bailey from Rockhanipton (collector ? ), 

 3ft. Mature leaf ; 36, anther. Rockhampton. (Late A. Thozet.) 



E. crebni, F.v.M. 

 4ffl, 46. Juvenile leaves, near Dubbo. (J. L. Boornian.) 

 5(1. Broadish mature leaf ; 5J, anther. Lower Kurrajong. (.J.H.M.) 



6. Rather large fruit. Wybong Creek. (Augustus Rudder.) 



7. Fruit. Baulkham Hills. (Rev. Dr. WooUs.) 



8. Fruit not perfectly ripe, showing rim. Windsor. (.J. S. Allan.) 



9. Fruit, nearly ripe, showing marked rim. Capertec. (J.H.M. and J. L, Boorman.) 



F 



