Medullary ray

From WikiWOOD

Medullary rays are aggregates of cells forming radial sheets or ribbons extending vertically through the tree, across and perpendicular to the growth rings. Also called pith rays or wood rays, these formations of cells allow the radial transmission of sap.

In quartersawn material, where the wood is cut in to boards with the growth rings roughly perpendicular to the face of the board, the medullary rays often produce beautiful figure.

Rays are not very absorbent and will not be much affected by the application of stain.

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