Vascular System of Matonia pectinata . 501 
DIAGRAMS SHOWING THE DIFFERENT STAGES OF PROGRESSIVE COMPLICATION 
* BY TRANSVERSE SECTIONS OF CORRESPONDING NODES, INTERNODES, AND 
LEAF-TRACES ( continued ). [The diagrams represent actual sections x 15.] 
(3) Starved intermediate plants. 
Internode. A T ode. Leaf-trace. 
Fig. 13. Xylem diagonally lined, Phloem black* Endodermis dotted, 
