311 



3. Petiole Very Long. 

 E. Foelscheana. E. pojndifoUa. 



E. Hillii. E. rariflora. 



4. Peltate Leaf. 



A very few at that age (what Bentham calls " sapling leaves ") especially in the Coryinbosa? series, 

 appear to be already alternate, but have the lamina peltately inserted on the petiole above the base, but 

 our data on that point are but very scanty. (B.F1. iii, 187.) 



The petiole is a continuation of the midrib, and in peltate leaves the base of the 

 leaf is extended below the point of insertion of the petiole into the leaf. 



The remarks of Mueller in " Eucalyptographia " on the peltate leaf are chiefly- 

 based on E. pehata, a species which, at Part XLII, p. 33, I have shown to have been 

 erroneously understood by him as regards its mature leaves. Bentham followed Mueller's 

 earlier description of E. peltata as regards the supposed peltateness of the mature foliage. 



Then Naudin has some remarks on the subject, translated herewith : — ■ 



These are not the only modifications of the foliage in Eucalyptus. There are some 

 species in the group, which in opposition to the preceding can be called Uniform, in which the primordial 

 leaves, alternate and petiolate, are really peltate by reason of the insertion of the petiole at a certain 

 distance from the base of the leaf. This character is not very constant, for in the same species one finds 

 species which have it and other which have not. Besides, it does not generally affect more than the first 

 five or six first leaves, sometimes also a large number. But if it is transitory in these species, it becomes 

 permanent in others; it is at least the case of E. pdtata, whose leaves remain peltate during the whole 

 life of the tree. (Naudin, 1st Mem.., 347.) 



A few years later, Naudin wrote : — 



There is finally a last peculiarity, the way in which the petiole is inserted on the blade. In the 

 great majority of species this insertion takes place at the very base of the blade, as in our native (French) 

 trees, but there is a small number of them in which it occurs a little below the insertion of the petiole. 

 The result is what is called peltate leaves. This modification is always limited to the juvenile stage, except 

 in one species, E. pdtata, in which this character becomes permanent. (Naudin, ii, 10.) 



In ii, 16, Naudin adds citriodora, maculata, and calophylla as having peltate 

 leaves. He is referring to very young leaves. No species has peltate leaves throughout 

 the whole life of the species; the mistake, as regards E. peltata, originated with Mueller, 

 and has already been dealt with. 



So far as I have seen, the peltate leaves preponderatingly belong to the Corym- 

 bose. Those that I have seen are, and no doubt peltateness will be found in others : — 



E. calophylla. E. peltata. 



E. eximia. E. Torelliana. 



E. ficifolia. E. tracliyphloia. 



E. maculata. 



In addition, we have E. erythrocorys (belonging to the allied Eudesmiea?), and 

 others should be searched for. 



