32 MEMOIRS OF. THE NEW YORK BOTANICAL GARDEN 



Fig. 13. Trochodendron aralioides, longitudinal radial section through summer- 

 wood, showing diffuse parenchyma, X 300. 



Fig. 14. Trochodendron aralioides, longitudinal radial section through the spring- 

 wood and a small portion of the summer-wood, X 250. 



Fig. 15. Tetracentron sinense, longitudinal tangential section of stem, showing 

 lateral leaf-trace and subtending trachcids, X 45. 



Fig. 16. Tetracentron sinense, longitudinal tangential section through the short 

 tracheids below entering leaf-trace, X 100. 



Fig. 17. Tetracentron sinense, transverse section of phloem, showing two com- 

 panion cells, X 600. 



