Commelinidae
Definition
- Noun:
- A taxonomic subclass: In botanical classification, "Commelinidae" is the name of one of the four subclasses or superorders within the Monocotyledones (monocots). It is a large group comprising approximately 19,000 species across 25 families. Its members are predominantly terrestrial herbaceous plants, often found in moist habitats.
Usage
- Scientific Classification: The term is used almost exclusively in the context of plant taxonomy and systematic botany to categorize a major lineage of flowering plants.
- The order Poales, which includes grasses, is placed within the subclass Commelinidae.
- Botanists study the evolutionary relationships among families in the Commelinidae.
Advanced Usage
- In Phylogenetic Context: In modern phylogenetic systems (like the APG system), the traditional rank-based name "Commelinidae" is often referred to as the "commelinid monocots," a well-supported clade.
- The commelinid monocots are a monophyletic group distinct from other monocots like lilies and orchids.
Variants and Related Words
- commelinid (adjective/noun): Pertaining to the Commelinidae subclass; a member of this group.
- The commelinid families share certain biochemical and morphological characteristics.
- Commelinales (noun): An order of flowering plants within the Commelinidae, containing families like Commelinaceae (the spiderwort family).
Synonyms
- commelinid monocots: A more modern, rank-free term for the same evolutionary group.
- (There are no common-language synonyms, as this is a precise scientific term.)
Different Meanings
- This word has only one specific meaning in scientific (botanical) English. It does not have general or figurative uses.
Notes
- The name "Commelinidae" is derived from the type genus (spiderworts). The group includes economically and ecologically vital families such as:
- Poaceae (Gramineae - grasses, including cereals like wheat and rice).
- Cyperaceae (sedges).
- Arecaceae (palms).
- Zingiberaceae (ginger family).
- Bromeliaceae (pineapple family).
Noun
-
one of four subclasses or superorders of Monocotyledones; comprises about 19,000 species in 25 families of mostly terrestrial herbs especially of moist places including: Cyperaceae; Gramineae; Bromeliaceae; and Zingiberaceae
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