Water milfoil stem. Light micrograph of a transverse section through the stem of the aquatic whorled water milfoil (Myriophyllum verticillatum) plant.


Water milfoil stem. Light micrograph of a transverse section through the stem of the aquatic whorled water milfoil (Myriophyllum verticillatum) plant. All aquatic plants (hydrophytes) have a similar stem structure. The epidermis has a thin cuticle and is permeable to water. The vascular tissue (centre) acts as a cable to resist the movement of water. Below the outer endodermis (purple ring) is a ring of phloem (small dark blue cells) and an inner thin ring of xylem (large circles). The pith consists of large-celled parenchyma (deep blue). Magnification: x14 when printed 10 centimetres wide.


Size: 5705px × 4937px
Photo credit: © DR KEITH WHEELER/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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