30 



Very little was known by me about this species until, in Mr. R. H. 

 Cambage's recent trip to Northern Queensland, he observed this tree and brought 

 back excellent specimens. The following were collected by him : — 



(1) It occurs near Boomarra, about 100 miles north of Cloncurry, also between 



Quamby and Granada, on cretaceous elevated sandstone formations, and 

 again just to the east of Cloncurry on Silurian slate ridges. 



(2) In bud and flower, Cowan Downs, Cloncurry River, 120 miles south of 

 Normanton. (No. 3,915). 



(3) "Mountain White Gum." Donor's Hills, Flinders River, 100 miles 



south of Normanton. (No. 3,912). 



(1) Stunted white gum trees, smooth bark, timber red. Gravelly ironstone and 

 sandy ridge, near Donor's Hills, about 85 miles south of Normanton. 



AFFINITIES. 



1. With E. oleosa F.v.M. Mueller suggests the affinity, and Bcntham, in 

 referring to it, says : " The venation of the leaves and the fruit are very different." 



Tor the purposes of comparison, reference may be made to Plates G5 and GO of 

 the present work. Certainly some of the mature leaves of E. pallidifolia resemble 

 some leaves of E. oleosa, but the resemblance is exceptional. The shape of the 

 buds is sometimes similar {e.g., Fig. 4h, Plate G5). but again the resemblance is 

 exceptional, for the operculum of E. oleosa is pointed. There is but slight 

 resemblance in the fruits, while the anthers are very different. 



Mr. Cambage remarks that when seen growing in the forest the two species 

 bear no resemblance to one another. 



2. With E. alba Reinw. 



E. pallidifolia F.v.M. bears a resemblance in juvenile foliage to that of the 

 above species, though that of E. alba is usually much larger, and the adult leaves 

 of the two species are different enough. The buds and fruits, though smaller in 

 E. pallid/folia, bear a general resemblance to those of E. alba. The anthers of the 

 two species are not very dissimilar ; that of E. pallidifolia is a little the shorter. 



3. With E. populifolia Hook. 



The young foliage of this species bears a certain resemblance to that of E. 

 pallidifolia, but 1 lie mature foliage of the two species is very different. The 

 anthers, also, are very different. 



