383 



any theory of a common origin in New Zealand. The most feasible theory is that 

 there are or were in Tasmania parent trees from which the New Zealand specimens 

 have all been separately derived. Whether these parent trees belonged to a distinct 

 species or were themselves hybrids between E. umigera and E. globulus is a question 

 the solution of which should be sought in Tasmania. 



The above are Mr. Simmonds' own words. Following are our own, for which 

 Mr. Simmonds is, of course, in no way responsible. 



We forwarded a specimen of E. biangularis to Mr. L. G. Irby, Conservator of 

 Forests, Hobart, who stated that he had not encountered this particular form in 

 Tasmania. Mr. Irby also asked Mr. L. Rod way, Government Botanist, Tasmania, 

 for an expression of opinion, and the reply, addressed to Mr. Simmonds, was as follows : 



: ' Mr. Irby desires me to reply to your letter of the 22nd instant. Your specimen 

 appeals to me as an extreme form of the very variable E. umigera. I have never 

 found its exact counterpart in Tasmania, but I have a specimen taken from a tree 

 growing at Combe Royal, Scotland, which is identical with it. This was a tree about 

 eighty years old and grown from seed gathered on Mount Wellington, Tasmania. I 

 have a specimen also which is from a tree growing at Lord Balfour's seat, Wethemstone, 

 whose history is the same, but whose form is about the reverse. Little bits of flowers 

 and fruits. I have another specimen from a tree on the slopes of Mount Wellington, 

 with almost spherical fruits and long (9 inches) linear leaves. My experience with some 

 of our Eucalypts is that they vary considerably according to edaphic and climatic 

 conditions." 



AFFINITIES. 



It may be desirable to refer to E. globulus, Part XVIII, p. 249, Plate 79, 

 figs. 1-12. 



1. With E. umigera Hook, dealt with in Part XVIII, p. 262. 



The buds and fruits of both species are in threes, and they are also pedicellate, 

 but the pedicels are more strongly angular in E. biangularis than in E. umigera. 



2. With X E- pseudo-globulus (Hort) Naudin, described in Part LII, p. 78. 



This hybrid species, like E. biangularis, is one in which the buds and fruits are 

 in threes. The buds, however, differ from those of E. biangularis in the quadrangular 

 pedicel and in the verrucose operculum, and the morphology of the fruits, like the 

 operculum, is of the E. globulus type. 



3. With X E- Insizwaensis Maiden, described in Part LII, p. 82. 



This species is also a hybrid with the floral characters of E. biangularis, but the 

 buds are sessile, and the fruits are more cylindrical. 



