132 



CONIFERALES (RECENT) 



[C1I. 



p.i 



FIG. 691. A, Araucaria Bidwillii, tracheids from the cone-axis. B D, F, Agathis 

 bornensis ; B, wood of branch, multiseriate pits and, at the ray, scalarif orm pits ; 

 C, tangential section; D, radial section of branch showing transition from 

 alternate and opposite to scalarif orm pits; F, pits and rudimentary Sanio's 

 rims. E, Araucaria Cookii, radial section of root. G, H, Larix americana, 

 radial section of root. (After Thomson.) 



