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Collar  [ Biology ]

Dictionary of botanic terminology - index of names

  In Biology  terminology a collar describes an encircling structure or bandlike marking or junction, as around the neck of an animal, or a plant base suggestive of a collar.  
Collar   [ Botany  ] 
Crown, Root neck
  In botany the collar or crown is the neck or line of junction between the root of a plant and its stem;  
The transition point between stem and root. The area of the axis of a plant where the tissues differentiate into stem and root and merge to each other. Normally this area appears swollen or tapered, but can also be constricted and very thin, and is located near or at soil level. It may be clearly or vaguely apparent.

The collar is a vulnerable area prone to fungal  diseases known as collar rot or crown rot.





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