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Last updated on April 25, 2014 at 1:22 EDT
Psidium stem 1
279 of 430

Psidium stem 1

March 8, 2013
Scanning electron microscope image of x-section through Psidium guajava stem. Image shows thin outer epidermal layer with a thick layer of cortex beneath. Vascular area consists of secondary phloem and primary xylem, with vascular cambium in between. The central pith has some mucilage present. Myrtales Myrtaceae (myrtle family) Psidium guajava woody dicotyledon Zeiss DSM 962 SEM Credit: Louisa Howard, Charles Daghlian