order Filicales
Definition
Noun: 1. The taxonomic order Filicales: A major order of ferns, specifically the leptosporangiate ferns. This group is characterized by sporangia that develop from a single cell and have a specialized mechanism for spore dispersal.
Usage
- As a taxonomic classification: The term is used in scientific contexts, particularly in botany and paleobotany, to classify a large, natural group of ferns.
- The fossil record suggests that the order Filicales diversified during the Mesozoic era.
- Botanists study the evolution of spore dispersal mechanisms within the order Filicales.
Advanced Usage
- In modern phylogenetic classifications, the traditional "order Filicales" has been largely superseded by more refined groupings (e.g., orders like Polypodiales). However, the term remains useful in historical and educational contexts to refer to the core group of leptosporangiate ferns.
- While "Filicales" is an older classification, it still encompasses most common ferns familiar to gardeners.
Variants and Related Words
- Filicales: The same term, often used without "order."
- Leptosporangiate ferns: A descriptive term for the defining characteristic of this group.
- Polypodiales: A modern order that includes many ferns formerly classified under Filicales.
Synonyms
- Leptosporangiate ferns (descriptive synonym)
- True ferns (common name synonym, as indicated in the reference context)
Related Terms
- Fern: The common name for plants in this and related groups.
- Sporangium (pl. sporangia): The spore-producing structure.
- Leptosporangiate: Referring to sporangia that arise from a single epidermal cell.
Noun
-
true (leptosporangiate) ferns
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