In botany, the tissue or region that generates or produces the root cap (calyptra) as a root grows.
From Greek kalyptro (covering) plus -gen (producer or generator), literally meaning 'that which produces a covering.' Scientific botanical term established in the 19th century.
The calyptrogen is like a tiny factory inside the root—it's constantly producing replacement cells for the cap that gets worn away by friction as the root digs through soil, making it a tissue that understands planned obsolescence!
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