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The Collaborative International Dictionary

Glume \Glume\ (gl[=u]m), n. [L. gluma hull, husk, fr. glubere to bark or peel: cf. F. glume or gloume.] (Bot.) The bracteal covering of the flowers or seeds of grain and grasses; esp., an outer husk or bract of a spikelet.


n. (context botany English) a basal, membranous, outer sterile husk or bract in the flowers of grasses (Poaceae) and sedges (Cyperaceae)


n. small dry membranous bract found in inflorescences of Gramineae and Cyperaceae


A glume is a phytomorphological term used in botany referring to a part of the inflorescence of grasses ( Poaceae) and sedges ( Cyperaceae).

Glumes are bracts subtending the flowers of a sedge or the spikelets of a grass.

In grasses, two bracts known as "glumes" form the lowermost organs of a spikelet (there are usually 2 but 1 is sometimes reduced; or rarely, both are absent). Glumes may be similar in form to the lemmas, the bracts at the base of each floret.

In sedges, by contrast, a glume is a scale at the base of each flower in a spikelet.

Usage examples of "glume".

The Dainnan showed them how to rub the grass-seeds between their hands and let the breeze winnow the outer glumes away.

The Bearded Darnel, a common grass weed in English cornfields, is easily distinguished by its long glumes or awns and turgid, fruiting pales, containing the large grains, from the common Ray or Rye-grass (Lolium perenne), which is one of the best of the cultivated grasses, peculiarly adapted for both hay and pasture, especially in wet or uncertain climates.