DR KEITH WHEELER / SCIENCE PHOTO LIBRARY DR KEITH WHEELER / SCIENCE PHOTO LIBRARY
Common rush stem. Light micrograph of a section through the stem of a common rush (Juncus conglomeratus) plant, showing stellate cells. The stem has scattered vascular bundles suspended by stellate dead cells (pink). There is an outer ring of solid supporting tissue (epidermis) with a thick cuticle (red). Within this, the cortex contains spongy mesophyll with chloroplasts (red ovals), with vascular bundles in-between. The oval vascular bundles have supporting fibres (red) surrounding the outside. Facing the outside of the stem is the circular phloem (blue), and on the inner side the larger xylem vessels (red). Magnification: x70 when printed 10 centimetres wide.
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