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Caryopsis
In botany, a '''caryopsis''' is a type of simple dry fruit — one that is monocarpelate (formed from a single carpel) and indehiscent (not opening at maturity) and resembles an achene, except that in a caryopsis the pericarp is fused with the thin seed #Seed_structure|seed coat.
The caryopsis is popularly called a grain and is the fruit typical of the family ''Poaceae'' (or ''Gramineae''), such as wheat, rice, and maize|corn.
The term grain is also used in a more general sense as synonymous with cereal (as in "cereal grains", which include some non-''Gramineae''). Considering that the fruit wall and the seed are intimately fused into a single unit, and the caryopsis or grain is a dry fruit, little concern is given to technically separating the terms "fruit" and "seed" in these plant structures. In many grains, the "hulls" to be separated before processing are actually flower bracts.
Category: plant morphology
Related Images- An assortment of caryopses
Sources: StartLearningNow, Wikipedia | Usage license: GNU FDL
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