1. Apex of terminal twig of 1908, field 



plant, July 22. 



2. Near base of same. 



3. Pseudo-tylose with rubber in the cells. 



4. Leptome, field plant. 



5. Pith of a field stem, 10 mm. diam. 



6. An old leaf trace. 



7. Outer cortex of a field stem. 



8. Outer edge of cortex and inner zone of 



cork derived from collenchyma. 



