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Sunflower stem vascular
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Sunflower stem vascular

March 8, 2013
Scanning electron microscope image of longitudinal section of Helianthus annus [sunflower] stem showing area of vascular bundles. Asterales Asteraceae (sunflower family) Helianthus annus herbaceous dicotyledon Zeiss DSM 962 SEM Credit: Louisa Howard, Charles Daghlian