Caryopsis
Caryopsis
Caryopsis (pronounced: /ˌkæriˈɒpsɪs/), also known as a grain, is a type of fruit specific to the grass family (Poaceae). The term is derived from the Greek words 'karyon' meaning 'nut' and 'opsis' meaning 'like'.
Definition
A caryopsis is a simple, dry, one-seeded fruit in which the ovary wall is tightly fused to the seed coat. The pericarp (fruit wall) and the seed coat are inseparable, making it difficult to distinguish between the two.
Characteristics
Caryopses are small and hard, often appearing as grains. They are indehiscent, meaning they do not split open at maturity to release seeds. The most common examples of caryopses include wheat, corn, rice, and oats.
Etymology
The term 'caryopsis' was first used in the early 19th century and is derived from the Greek words 'karyon' (nut) and 'opsis' (like). This is in reference to the nut-like appearance of the fruit.
Related Terms
- Fruit: The mature ovary of a flowering plant.
- Grass family (Poaceae): A large family of flowering plants that includes cereal grasses, bamboos and the grasses of natural grassland and cultivated lawns and pasture.
- Pericarp: The part of a fruit formed from the wall of the ripened ovary.
- Indehiscent: A term used to describe fruit that do not split open at maturity.
External links
- Medical encyclopedia article on Caryopsis
- Wikipedia's article - Caryopsis
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