File:Multiseriate Medullary Rays in Woody Dicot Stem of Liriodendron (36297489566).jpg

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cross section: Liriodendron stem magnification: 100x

<a href="http://blogs.berkshirecc.edu/bccoer" rel="nofollow">Berkshire Community College Bioscience Image Library</a>

Medullary rays are formed by the activity of the vascular cambium and are initially parenchymatous. Later in development they may mature into xylem or phloem elements, or they may remain as rays where they work to transport water, minerals and nutrients from the center to the periphery of a root or stem.

Rays in Angiosperm wood consist almost entirely of starch containing parenchyma cells. Tracheids are rarely seen.

Medullary rays range in size from uniseriate (one layer) as seen in Gymnosperms, to multiseriate (many layers) as is seen in many woody dicots.
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Source Multiseriate Medullary Rays in Woody Dicot Stem of Liriodendron
Author Berkshire Community College Bioscience Image Library

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This image was originally posted to Flickr by bccoer at https://flickr.com/photos/146824358@N03/36297489566 (archive). It was reviewed on 5 October 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-zero.

5 October 2019

Files from Berkshire Community College Bioscience Image Library Flickr stream uploaded by Netha Hussain

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current19:40, 5 October 2019Thumbnail for version as of 19:40, 5 October 20193,264 × 1,840 (2.41 MB)Netha Hussain (talk | contribs)Transferred from Flickr via #flickr2commons

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