Sunflower Stem 1
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Sunflower Stem 1

March 8, 2013
Scanning electron microscope image of x-section through Helianthus annus [sunflower] stem. Image shows outer epidermal layer, followed by the cortex and then large vascular bundles. The vascular bundles have vascular cambium between the phloem (nearest the cortex) and xylem. Asterales Asteraceae (sunflower family) Helianthus annus herbaceous dicotyledon Zeiss DSM 962 SEM Credit: Louisa Howard, Charles Daghlian

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