198 



AFFINITIES. 



1. With E. clavigera A. Cunn. 



" The species seems distinct from E. clavigera in longer and narrower leaves with less prominent veins 

 in thinner petioles, in less numerous flowers on shorter pedicels, and perhaps in the form of fruit." (Original 

 description.) 



" E. papuana may not really be distinct as a species from E. clavigera as pointed out formerly in 

 Descr. Notes on Papvan Plants (the original description), but the tree from New Guinea is as yet imperfectly 

 known, and we here are quite unacquainted with the characteristics of its bark, on which for due 

 discrimination of Eucalypts so very much depends." (" Eucalyptographia " under E. clavigera.) 



Undoubtedly there are close relations between E. clavigera and its allies. As 

 between E. clavigera and E. papuana, see Plates 152 and 155. The juvenile leaves and 

 bark of E. clavigera show a sufficient difference. 



2. With E. grandifolia E.Br. 



In E. grandifolia we have very large juvenile leaves, and a greater tendency to 

 coarse lanceolate leaves in intermediate stage; long pedicels and larger fruits. 



In E. papuana they are, generally speaking, broader, and with a somewhat 

 different venation. Sometimes we have sessile flowers or with not very long pedicels. 

 The "twisted" leaves are quoted by most observers and appear to occur in both 

 E- papuana and E. grandifolia. 



E. papuana F.v.M. and E. grandifolia R.Br, were considered by J. G. Luehmann 

 to be varieties of E. clavigera (Proc. /lust. Assoc. Adv. Science, VII, 525). The juvenile 

 foliage of E. clavigera sharply separates it from the other two species, butE. papuana 

 and E. grandifolia are closely related to each other, and I believe I have produced 

 sufficient evidence that they are distinct species. I think it is very probable that we 

 have additional facts to glean in regard to the relations of all three. 



3. With E. tesselaris F.v.M. 



" The discrimination of the likewise closely allied E. tesselaris is less difficult " (than from E. clavigera. 

 Extract from original description of E. papuana.) 



" By samples of E. tesselaris from New Guinea from Rev. T. Chalmers, the transit seems established 

 to E. papuana, which was described from scanty material of an aberrant form with broader leaves and 

 longer flower stalks " (than E. tesselaris). (" Eucalyptographia " under E. tesselaris.) 



I will refer to the differences between these species when E. tesselaris is dealt 

 with in Part XXXVIII. 



