1916] HOFFSTADT—PIPER METHYSTICUM 123 
early becomes lignified (figs. 13, 14). Later, owing to growth of 
the bundles, this band is broken and patches appear only at the 
inner portions of the bundles (fig. 18). 
Fic. 12.—Detail of double bundle with xylem points outside; 820 
The pericycle consists of only a few cells (fig. 16) just outside 
the bundles in both the peripheral and pith systems, and nowhere 
else. It can be distinguished easily in the young stems by the 
