STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Cotton stem. Light micrograph of a cross-section through a cotton (Gossypium sp.) stem. There is a large area of central pith surrounded by secondary xylem (light green) and secondary phloem (purple) tissue. Magnification: x10 when printed at 10 centimetres wide.
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