309 



c. From a more advanced young shoot. 



9. Alternate, broadly and obliquely lanceolate, venulose on both surfaces, 

 intramarginal nerve close to the edge ; 9| by 4| cm. 



10. Same as 9, but broader, i.e., 5 cm. 



Then we approximate to the mature leaf. 



It can now be clearly seen that the proper expression should be, not the 

 intermediate leaf, but an intermediate leaf, i.e., one of a number of leaves intermediate 

 between the two extremes of juvenile and mature leaves. 



Let us now briefly consider examples from the Corymbosce and the Eudesmiece. 



3. E. dichromophloia F.v.M., figs. 3a, 36, 3c, Plate 202, Part XLIX. 



The leaves figured at 3a are sessile, stem-clasping and scabrous, owing to stellate 

 hairs. In this juvenile scabrous state the margins are crenulate, and the leaves have 

 cordate bases and bluntish apices, with a length of 7-8 cm. and a breadth of 4-5 cm. 

 Still, in the opposite stage we have two different additional forms, 36 and 3c, which 

 may be classed as Intermediate leaves, and they form, with 3a, a 'series more or less 

 characteristic of the Corymbosce. 



36 differs from 3a in absence of hairs, in being more elongate and tapering, having 

 perhaps twice the length of 3a, and about the same width. 36 has the secondary venation 

 even more conspicuous than 3a, and thicker in texture, the venation somewhat curved, 

 parallel and distant, making an angle of about 50-60 degrees with the midrib. The 

 margin is somewhat crenate, and this form is on the verge of becoming shortly 

 pedunculate, and both 3a and 36 have a tinge of yellowishness. 3c shows a marked 

 difference. The petioles are rather long, the leaves are pale-coloured, and similar on 

 both sides, are rather broader than 36, and the venation very different. In 3c, the 

 secondary veins are scarcely visible, very fine and parallel, and at an angle of about 

 50-60 degrees with the midrib. Beyond this the mature, alternate leaves are much 

 narrower. 



In E. eximia Schauer, we may have — 



1. Small leaves, persistent after the cotyledon leaves, succeeded by 



2. Larger leaves which, while still in the falcate-veined stage, are — 



(a) Cordate-based, or 



(b) Peltate, or 



(c) Petiolate without auricular or peltate bases. 



We also find the axis more or less glandular, showing a tendency to contain oil. 



