A small chaffy or membranous scale, particularly one of the bracts enclosing a grass flower.
From Latin 'gluma' (husk or chaff). Used in botany since the 1700s to describe the papery scales that protect grass florets, borrowed directly from Latin agricultural terminology.
When you look at a blade of grass or wheat up close, those tiny papery husks you see covering the flower are glumae—they're nature's packaging for keeping pollen safe and dry!
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