In a dicot stem, youngest layer of secondary xylem is situated

Youngest layer of secondary xylem is located

In a mature dicot stem which has undergone seconday growth, youngest layer of secondary xylem is situated

In a mature dicot stem which has undergone seconday growth, youngest layer of secondary xylem is situated

In a mature dicot stem which has undergone seconday growth, youngest layer of secondary xylem is situated

In a six year old stem, the oldest layer of secondary xylem is situated just

In a five year-old stem the oldest layer of secondary xylem is situated just outside the primary xylem.

Outer layer of secondary xylem is ·called _____