Medullary ray (botany)

In botany, Medullary rays refer to a characteristic found in woods. In this context the term refers to 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 primarily parenchyma cells allow the radial transmission of sap and are essential in the process of tylosis. In quartersawn material, where the wood is cut into boards with the growth rings roughly perpendicular to the face of the board, the medullary rays often produce beautiful figure such as silver grain, medullary spots, pith flecks, etc.^[1]

References

1. ^ Corkhill, Thomas (1989). The Complete Dictionary of Wood. Dorset Pr. ISBN 0-88029-318-7. 

This botany article is a stub. You can help Wikipedia by expanding it.v · Categories: Plant anatomy Botany stubs Wikimedia Foundation. 2010. Игры ⚽ Поможем написать реферат Medullary ray (anatomy) Medullary striae of fourth ventricle Look at other dictionaries: Medullary ray — may refer to: Medullary ray (anatomy), the middle part of the Cortical lobule Medullary ray (botany), characteristic radial sheets or ribbons extending vertically, found in woods This disambiguation page lists articles associated with the same… …   Wikipedia medullary ray — noun a sheet of vascular tissue separating the vascular bundles • Syn: ↑vascular ray • Hypernyms: ↑vascular tissue * * * noun 1. : a ray of primary origin in the stele of various cryptogamous and dicotyledonous vascular plants that extends… …   Useful english dictionary ray — I. /reɪ / (say ray) noun 1. a narrow beam of light. 2. a gleam, or slight manifestation, of intelligence, comfort, etc.: a ray of hope. 3. a ray like line or stretch of something. 4. Poetic light or radiance. 5. a line of sight. 6. Physics a. any …   vascular ray — noun a sheet of vascular tissue separating the vascular bundles • Syn: ↑medullary ray • Hypernyms: ↑vascular tissue * * * noun : a ray of cambial origin that occurs in the stele of many vascular plants and often separates the vascular bundles see …   Useful english dictionary wood ray — noun : xylem ray * * * wood ray, Botany. medullary ray …   Useful english dictionary Cortex — (Latin: bark , rind , shell or husk ) may refer to: Contents 1 Sciences 2 Anatomy 2.1 Organs 2.1.1 The brain 3 …   Wikipedia Medulla — refers to the middle of something and derives from the Latin word for marrow. Its anatomical uses include: Medulla oblongata, a part of the brain stem Renal medulla, a part of the kidney Adrenal medulla, a part of the adrenal gland Medulla ossea …   Wikipedia 18+ © Academic, 2000-2024 Contact us: Technical Support, Advertising Dictionaries export, created on PHP, Joomla, Drupal, WordPress, MODx. Mark and share Search through all dictionaries Translate… Search Internet Share the article and excerpts Direct link … Do a right-click on the link above and select “Copy Link”