Spermatophyta
Definition
Noun: - A major division of plants: Spermatophyta refers to the group of plants that reproduce by producing seeds. This division includes all seed-bearing plants, characterized by the development of an embryo within a protective seed coat.
Usage
- Scientific Classification: The term is used in botanical taxonomy to classify and discuss plants that form seeds.
- The evolution of Spermatophyta was a key development in plant history.
- Botanists study the diverse reproductive strategies within Spermatophyta.
Advanced Usage
- Coordinate Taxonomic Groups: In some classification systems, Spermatophyta is a major group at the same taxonomic level (coordinate with) other divisions like Pteridophyta (ferns and allies) and Bryophyta (mosses and liverworts).
- The traditional classification placed Spermatophyta, Pteridophyta, and Bryophyta as the primary divisions of the plant kingdom.
Variants and Related Words
- Spermatophyte (n): An individual plant belonging to the division Spermatophyta; a seed plant.
- An oak tree is a common spermatophyte.
- Angiospermae / Magnoliophyta (n): A subclass or phylum within Spermatophyta; the flowering plants that produce seeds enclosed within a fruit.
- Gymnospermae / Gymnospermophyta (n): A subclass or phylum within Spermatophyta; plants that produce seeds not enclosed in an ovary, such as conifers.
Synonyms
- Seed plants: The common descriptive term for Spermatophyta.
- Phanerogams: An older, synonymous term for seed-producing plants.
Notes on Meaning
- Primary Meaning: The core meaning is the taxonomic group encompassing all seed-bearing plants.
- Composition: The division is understood to comprise two main groups: the angiosperms (flowering plants) and the gymnosperms (e.g., pines, firs, cycads).
Noun
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seed plants; comprises the Angiospermae (or Magnoliophyta) and Gymnospermae (or Gymnospermophyta); in some classification systems Spermatophyta is coordinate with Pteridophyta (spore producing plants having vascular tissue and roots) and Bryophyta (spore producing plants lacking vascular tissue and roots)
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