Angiosperms Tetracentron , Trochodendron , and Drimys. 505 
Text-Figs. 1-5. Types of tracheides that Occur in the secondary xylem of Tetracentron, 
Trochodendron, and Drimys. 6. Type of vessel-segment that occurs in the secondary xylem of 
Cercidiphyllum, Euptelea , and various Monimiaceae. 7. Type of vessel-segment that occurs in 
the secondary xylem of the Magnolieae. 8. Type of vessel-segment that occurs in the secondary 
xylem of the Lauraceae and many other Dicotyledons. 9. Type of vessel-segment that occurs 
in the secondary xylem of the Leguminosae and many other Dicotyledons. . 
