Definition

Noun: 1. A family of ferns: Parkeriaceae is a taxonomic family of aquatic ferns. It is a small family, often considered to contain a single genus, Ceratopteris. * In botanical classification, it is noted that this family is coextensive with the genus Ceratopteris, meaning the family's members consist solely of the species within that genus. * Due to its close relationships, it is sometimes included in the family Polypodiaceae, a much larger and more common family of ferns.

Usage Notes

• Technical Term: This word is highly specialized and used almost exclusively in scientific contexts, particularly in botany, taxonomy, and paleobotany.
• Capitalization: As a proper noun referring to a specific plant family, "Parkeriaceae" is always capitalized.
• Context: It is used when discussing the scientific classification (taxonomy) of ferns. In general conversation or non-scientific writing, the common name "water sprite ferns" or simply the genus name "" is more likely to be used.

Examples

• The aquatic fern was identified and placed within the family Parkeriaceae.
• Some taxonomic systems merge Parkeriaceae into the larger Polypodiaceae family.
• The study focused on the evolutionary history of Parkeriaceae.

Advanced Usage

• Taxonomic Discussion: The word is used in debates or descriptions about plant phylogeny (evolutionary relationships).
  • The monophyly of Parkeriaceae is supported by recent molecular data. (This means genetic evidence confirms all members share a single common ancestor.)

Variants and Related Words

• Parkeriaceous (adj.): Relating to or characteristic of the family Parkeriaceae.
  • The fossil exhibited parkeriaceous traits.
• Ceratopteris (n.): The sole genus within the family Parkeriaceae, commonly known as water sprite or floating fern.
• Polypodiaceae (n.): The large family of ferns (the polypody family) within which Parkeriaceae is sometimes classified.

Synonyms

• Ceratopteridaceae: An alternative, synonymous family name sometimes used in taxonomic literature.
• Water fern family: A descriptive, non-scientific synonym referencing the habitat of these plants.

Different Meanings

This word has only one specific meaning in modern English: it refers to this particular botanical family. It is not used idiomatically or in other contexts.

Noun

1. coextensive with the genus Ceratopteris; sometimes included in family Polypodiaceae