55 ^ 
Smnott and Bailey . — The Origin and 
Diagram i. Woody twig with all rays narrow, the foliar rays being slightly wider than 
the others . 1 
Diagram 2. Herbaceous stem derived from No. 1 through more or less complete conversion 
into parenchyma of segments alternate with the leaf-traces. 
1 Crosses represent protoxylem. Bundles in solid black next the pith are leaf-traces in the stem. 
