﻿6o 



VEGETATIVE FEATURES. 



of the breaking up of a simple and normal series of bundles much after the manner 

 shown in the accompanying text figure 32, 5 to characterize Encephalartos. This 

 irregular form is also present in Cycadeoidea Jenneyana. 



In C. nigra, as outlined in figure 31 A, a much rarer form of bundle grouping 

 is present, thus far only observed in the single specimen 011 which this species is 

 founded. In this case two accessory groups of bundles, or else two single brokenly 

 concentric bundles, lie in the upper angle of the leaf base, just outside the V-like 

 depression in the main continuous series of bundles, which is iu other respects of the 

 usual cycadeoidean pattern. 



Fig. 29— Cycadeoidea sp. T. 750. < §. 



Tracing from polished surface of trunk, illustrating distortion of leaf base spirals by fructification. 



O, summit of an ovulate cone of inverted pear-shape 3.5 cm. long : a, apex of one of three very young (or aborted (?) ) axes ; b, two 

 bisporangiate axes, of which the larger bore apparently full grown son. Section of staminate disk in solid black ; p, one of three non- 

 conserved axes, which, from the rather small size of their bracts may be young, rather than the elongated peduncles of matured or 

 nearly mature fruits. (On the basis of this section alone it is impossible to say whether the fruits present represent one, two, or three 

 seasons of growth, or whether a monoecious, bisexual, or mixed flowering habit is indicated.) 



