LEPIDODENDRON 



137 



strands are met with in every transverse section of the 

 stem, forming a very characteristic feature (see Fig. 

 Lc 



Fig. 56. — Lepidode?tdron Harcourtii. A. Transverse section of stem, st, stele ; o.c, 

 outer cortex ; both here and in the inner cortex the leaf-traces are shown. About nat. 

 size. B. Stele of same, p, pith, hollow in middle ; x, xylem-ring ; px, protoxylem- 

 points ; the leaf-traces join the stele between them. /./., the leaf-trace bundles, 

 of which the outer, l.t.\ show xylem and phloem; i.e., inner cortex, x 7. Will. 

 Coll. 1594. (G. T. G). 



