family polypodiaceae
Học thuậtThân thiện
Definition
Proper noun A taxonomic family of ferns, known as the true polypody ferns. It is a large and diverse family that, in some historical or alternative classification systems, has been subdivided into several smaller, distinct families.
Examples of Usage
- The common polypody fern, , is a classic member of the family Polypodiaceae.
- Botanists reclassified many ferns formerly placed in the Polypodiaceae into more specific families.
- The study focused on the spore morphology across genera within the Polypodiaceae.
Advanced Usage
- In taxonomic discussion: The term is used to discuss the historical breadth of the family and its subsequent division in modern phylogenetics.
- The circumscription of the family Polypodiaceae has narrowed significantly with the advent of molecular data.
- As a type specimen: Used to specify the familial classification of a particular fern.
- The specimen was definitively identified as belonging to the Polypodiaceae.
Variants and Related Words
- Polypodiaceae (noun): The standard form, often used without the word "family."
- Ferns of the Polypodiaceae are often epiphytic.
- Polypod fern (noun): A common name for ferns in this family.
- Polypod (adjective): Relating to this family.
- The polypod ferns exhibited a distinct rhizome structure.
Synonyms
- Polypody family (noun): A common English name for the taxonomic family.
- (Historical) Broad Polypodiaceae (noun phrase): Refers to the older, more inclusive concept of the family before reclassification.
Notes on Different Meanings
This term has a single, specific meaning in scientific (botanical/biological) context. Its definition is tied directly to biological taxonomy. The "different meanings" relate to its changing scope within scientific history: 1. Traditional/Broad Sense: A very large family encompassing many fern groups (as indicated in the reference context, including groups like Dryopteridaceae). 2. Modern/Strict Sense: A more narrowly defined family, primarily containing the polypodies and their closest relatives.
Noun
- ferns: a large family that in some classification systems has been subdivided into several families (including Aspleniaceae and Blechnaceae and Davalliaceae and Dennstaedtiaceae and Dryopteridaceae and Oleandraceae and Pteridaceae)