92 R. H. CAMBAGE. 



The development of the plurinerved phyllode is some- 

 what more complex. The first indication of its advent is 

 also a strong straight nerve along or near the lower margin 

 of the petiole. On a succeeding petiole a convex flange- 

 like extension is developed on the upper margin, and in 

 this lamina a fine vein may appear approximately parallel 

 to the lower nerve and often confluent with it at both ends. x 

 A subsequent petiole may show the lamina becoming much 

 broader on the upper side of the strong nerve, with an 

 increased interval between the two nerves, while a lateral 

 extension of the lamina has commenced on the lower side. 

 If the phyllode is finally two-nerved, as in A. vernicifiua 

 and biriervata, the lower nerve is usually the more 

 prominent, and the remainder of the blade may be pinnately 

 veined with fine lateral veins on either side of both nerves. 

 (Fig. 2.) 



When the phyllode is triplinerved, or quintuplinerved, 

 the early development is the same as in the two-nerved 

 types, but succeeding petioles show a lateral extension 

 below the more prominent nerve which now appears to 

 become the central vein, and the lower margin becomes 

 nerve-like, or an intramarginal vein may develop on the 

 lower side. 



With a continued expansion of the blade in subsequent 

 petioles or early phyllodes, the nerve-like margins of one 

 phyllode sometimes seem to be represented by intramarginal 

 veins on subsequent ones. Where the phyllodes are 

 multinerved, the interspaces are usually finely striate 

 with parallel veins. 



Until more species are examined no conclusive opinion 

 can be expressed as to the relative ages of the uninerves 



1 "The Development and Distribution of the Natural Order Legu- 

 minosav" by E. C. Andrews, b.a., f.g.s., this Journal, Vol. xlviii, p. 396, 

 (1914). 



