THE OLDER SPOROPHYTE 



165 



A somewhat older sporophyte from D. jamaicensis is shown in fig. 148. In 

 this plant the third leaf was plainly visible and the second root had developed into 

 a short conical body which was pushing its way through the tissues between the 



Fig. 148. 



A, Bj C. Three sections of a sporophyte of Damea jamaicensis with three leaves 

 D. Median section of the second leaf. In C is shown the second root, r^ . X20. 



insertion of the first and second leaves. By this time tracheary tissue has developed 

 in the bundle from the second leaf, and now for the first time we note the presence 

 of large tannin cells in the neighborhood of the vascular bundles. Three of these 

 are shown in fig. 149, lying next the bundle of the second leaf. The irregular ring 



Fig. 149. 



A, the stem apex; B, apex of the second root of the sporophyte shown in fig. 148. X150. 

 The shaded cells in A are tannin sacs. 



of narrow cells shown in the figure and lying below the apical meristem marks the 

 point of insertion of the second root. Figure 149, B, shows a nearly median section 

 of the apex of this second root. The apical cell is nearly oblong in form and the 

 lateral segments are very large and periclinal segments which contribute to the root 



