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FPU 131: Wood Structure and Identification
leaning or crooked stems of dicotyledonous trees and characterized anatomically by lack
of cell wall lignification and often by the presence of an internal gelatinous layer in the
fibres. (→ Wood, compression).
Xylem. → Wood.
Xylem, primary. (204) — First formed xylem, differentiated from an apical meristem. Note:
Ordinarily at the edge of the pith.
Xylem, secondary. (205) — Wood produced by a cambium.
Xylem mother cell. (206) — A cell that is cut off on the inner side by a fusiform cambial initial,
but which undergoes further periclinal division before differentiating into a xylem cell
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