monocotyledones
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Definition
Noun 1. A major class of flowering plants: Monocotyledones is the taxonomic name for a large group of flowering plants (angiosperms) characterized by seeds that contain a single embryonic leaf, known as a cotyledon. This class is also defined by other typical features, including leaves with parallel veins, flower parts in multiples of three, and a scattered arrangement of vascular bundles in the stems.
Usage
- Scientific/Botanical Context: The term is used primarily in formal botanical classification and scientific writing to refer to this specific plant group.
Advanced Usage
- Synonym in Modern Taxonomy: In more recent classification systems (e.g., the Angiosperm Phylogeny Group system), the term "Monocotyledones" is often replaced by "monocots" or "Liliopsida." However, "Monocotyledones" remains valid and recognizable in historical and specific taxonomic contexts.
Variants and Related Words
- Monocot (noun): A common, informal abbreviation for monocotyledon or Monocotyledones.
- Monocotyledonous (adjective): Describing the characteristics of the Monocotyledones.
- Dicotyledones / Dicot (noun): The traditional contrasting major class of flowering plants, characterized by two cotyledons in the seed.
Synonyms
- Liliopsida: The alternative class name used in some taxonomic systems.
- Monocots: The common, abbreviated term for plants in this group.
Related Terms and Concepts
- Cotyledon: The embryonic leaf within the seed, the number of which (one) defines this class.
- Parallel venation: A key leaf characteristic of Monocotyledones, where veins run parallel to each other.
- Angiosperm: The larger group (flowering plants) to which the Monocotyledones belong.
Noun
- comprising seed plants that produce an embryo with a single cotyledon and parallel-veined leaves: includes grasses and lilies and palms and orchids; divided into four subclasses or superorders: Alismatidae; Arecidae; Commelinidae; and Liliidae