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Unformatted text preview: P i t h • The pith is comprised of parenchyma tissue with many intercellular spaces. • Some plants may have a “hollow” pith. An endodermis layer forms interior to the vascular tissue in these hollow-stemmed plants. • Pith rays, extensions of pith between vascular bundles radiate from the pith to the cortex. Pith rays are difficult to observe in plants that have a cylinder of vascular tissue in primary growth. Helianthus stem, xs...
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This note was uploaded on 01/08/2012 for the course BIO 213 taught by Professor Makina during the Fall '09 term at SUNY Stony Brook.
- Fall '09