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Preferred Term:

velamen

Definition:
Velamen is multiseriate, spongy layer of root epidermis that is composed of dead and air-filled cells. It is capable of rapid absorption and storage of water. It protects the root against excessive heating and water loss. It is mostly present in aerial roots of epiphytes.
Concept Schemes:
NALT Full
Broader Concept:
Entry Terms:
  • velamen roots
  • velamen radicum
URI:
https://lod.nal.usda.gov/nalt/309577
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RDF/XMLCreated 2017-10-04, last modified 2019-12-17