calyptrogen

calyptrogen

[kuh-lip-truh-juhn]
noun Botany.
the histogen layer that develops into the root cap.

Origin:
1880–85; calyptro- (combining form of calyptra) + -gen

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World English Dictionary
calyptrogen (kəˈlɪptrədʒən)
 
n
a layer of rapidly dividing cells at the tip of a plant root, from which the root cap is formed. It occurs in grasses and many other plants
 
[C19: from calyptra + -gen]

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