22 Weiss, Phloem of Lepidophloios and Lepidodendron. 



large cells of phloem at this point of leaf trace. 

 This is an enlarged view of the leaf trace near the 

 left-hand edge of Fig. i. //i = ploem, ^_y = xylem. 



Fig. 7. A similar leaf trace bundle as the one shown in Fig. 6, 

 with a similar arrangement of the phloem cells {ph.). 



Fig 8. Portion of transverse section oi Lepidodendron selaginoides 

 (Hick Collection No. 67) showing one of the bays 

 of phloem and the adjacent tissues. The smaller 

 elements on the inside of the phloem are leaf 

 traces, ph - phloem, xy = xylem. 



