31 



Association with E. corymbosa Sm. and E. squamosa Deane and 



Maiden. 



E. eximia is often associated with E. corymbosa and E. squamosa, but to a limited extent. It 

 usually prefers the well-drained rugged, often precipitous ridges, with a northerly or easterly aspect, as 

 seen along the railway line near the Hawkesbury Eiver station, while E. corymbosa prefers the better-class 

 soils of the northern, eastern, and western slopes ; also the medium soils interspersed with ironstone gravel 

 of the flat, open forests, on the tops of ridges. On the other hand, E. squamosa is usually confined to the 

 moist tops and somewhat sour, swampy, elevated southern depressions. When these species meet, they 

 do not penetrate beyond their ecological boundaries. In any case, E. corymbosa is the most aggressive of 

 the three, for it appears to have adapted itself to all sorts of environmental conditions. 



We now cross to the northern bank of the Hawkesbury River. 



Woy Woy and Hawkesbury River (Andrew Murphy). 



" Pepper," not Peppermint, is the Colo name, Hawkesbury River (a surveyor 

 whose name I have forgotten). 



Maitland (Sawyer's Gully), where it is known as Rock Apple. (R. H. Cambage.) 



AFFINITIES. 



We are dealing in this Part with four Yellow-barks or Yellow- jackets. They 

 all have palish timber (in contradistinction to reddish), viz., E. eximia, E. peltata, 

 E. Watsoniana, and E. trachyphloia, and have some affinities for that reason. They are 

 contrasted at p. 47. 



E. eximia is a member of the Corymbosse, and Bentham (B.F1. iii, 199) places it 

 nearest to E. maculata, giving the key. 



Flowers pedicellate in 3-flowered umbels ... E. maculata. 



Flowers sessile, in heads E. eximia. 



These are the only two species of the section he records as having a double 

 operculum. 



Mueller' s views as to the affinities of E. eximia will be given in his own order. 



1. With E. Watsoniana F.v.M. 



E. eximia is closely related to E. Watsoniana, differing mainly in narrower leaves, in the smaller 

 flowers without any stalklets, in the lid not exceeding the width of the calyx-tube, and in smaller fruits 

 with not emerging or protruding disc. (" Eucalyptographia," under E. eximia.) 



This is the only other Yellow-jacket with which Mueller contrasts it, and I will 

 refer to the affinity under table at p. 47. 



2. With E. Abergiana F.v.M. 



In its panicles it resembles E. Abergiana, but the leaves arc almost sickle-shaped and not 

 conspicuously darker above, the lid and calyx-tube are separated by a clear sutural line, and the seeds 

 are not provided with a terminating membrane. (" Eucalyptographia," under E. eximia.) 

 B 



