File:Monocot Stem Cortex in Sparganium (23808752008).jpg
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| Description |
cross section: Sparganium stem common name: burr reed magnification: 400x <a href="http://blogs.berkshirecc.edu/bccoer" rel="nofollow">Berkshire Community College Bioscience Image Library</a> The cells of the single layered epidermis have thickened outer walls and are overlaid with a well-developed cuticle. Numerous stomata are regularly spaced over the epidermal surface. A narrow outer cortex of several layers of densely packed photosynthetic parenchyma cells is bound on its inner and outer edges by small radially arranged bundles of thick walled sclerenchyma cells. The large inner cortex consists of a net like aerenchyma, interspaced with large radially arranged air pockets. Well developed vascular bundles are found at the intersections the aerenchym strands. Because of this arrangement a central vascular stele is absent. Within each vascular bundle proto and metaxylem are arranged in a V shape with phloem situated in between and above the metaxylem. A protoxylem lacunae is usually formed. The closed vascular bundles are wrapped in a bundle sheath of thick walled sclerenchyma cells. Vascular cambium is absent preventing the formation of secondary tissues. |
| Date | |
| Source | Monocot Stem: Cortex in Sparganium |
| Author | Berkshire Community College Bioscience Image Library |
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This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication. |
| The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.
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This image was originally posted to Flickr by bccoer at https://flickr.com/photos/146824358@N03/23808752008 (archive). It was reviewed on 5 October 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-zero. |
Files from Berkshire Community College Bioscience Image Library Flickr stream uploaded by Netha Hussain
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 19:36, 5 October 2019 | | 3,264 × 1,840 (1.25 MB) | Netha Hussain (talk | contribs) | Transferred from Flickr via #flickr2commons |
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