299 



55-70°. 

 E. diversicolor. E. megacarpa. 



55-75°. 

 E. maeulata var. citriodora (Corymbosse). 



55-90°. 

 E. leptophleba. 



55-85°. 

 E. Stuartiana var. grossa. 



60°. 

 E. maculata (Corymbosse). 



60-70°. 

 E. amplifolia. E. Deanei. 



b. Hybrids. — In these species I have not always been able to secure juvenile 

 leaves. In some cases, Intermediate leaves were the nearest I could get, and these 

 are indicated by the letter (I). It will be seen that they practically all belong to the 

 Obliquse (to be understood when venation and Mature Leaves is reached in the next 

 Part). 



25-^0°.— E. Studleyensis (I). 



30°. — E. Tenandrensis. 



30-40°. — E. antipolitensis, E. Insizwcensis. 



35— 15°. — E. Auburnensis. 



35-55°. — E. Auburnensis. 



40-50°. — E. Tenandrensis (I), E. Yagobiei, E. Bourlieri. 



40-55°. — E. Algeriensis. 



45°. — E. Studleyensis. 



45-50°. — E. antipolitensis, E. Cordieri, E. gomphocornuta (I). 



45-55°. — E. jugalis. 



45-60°. — E. Mclntyrensis. 



Isoblasticity ; Heteroblasticity. 



(These characters can obviously be dealt with under both Juvenile and Mature 

 leaves. They will be more fully dealt with under the latter in the next Part.) 



The apparent uniformity cf the leaves of certain species of Eucalyptus throughout 

 life, or, what is much more commonly observed, the changes in shape, size, vestiture, 

 texture, venation, which occur, have long attracted the attention of botanists, usually 

 in a general way. 



In the present work I have figured and given information concerning this 

 variation to an extent not previously recorded. The changes are shown in practically 

 every plate; some special references are in Parts XLII, p. 54, XLIX, p. 273. 



