cryptogamia
Học thuậtThân thiện
Definition
- Noun:
- In former biological classification systems: one of the two major divisions of plants, comprising all plants that do not produce seeds, such as ferns, mosses, algae, and fungi.
Usage
- Noun:
- The term Cryptogamia is used in historical scientific contexts to describe a now-obsolete taxonomic group.
- It is primarily encountered in texts discussing the history of botany and plant classification.
Examples
- Noun:
- Linnaeus's class Cryptogamia included ferns, mosses, and fungi.
- The study of Cryptogamia was essential to early botanical science before the advent of modern phylogenetic systems.
Advanced Usage
- The term is a historical taxonomic category and is not used in modern scientific classification, which is based on evolutionary relationships (phylogenetics) rather than morphological characteristics like seed production.
- It is often contrasted with Phanerogamia (or Spermatophyta), the historical division for seed-bearing plants.
Variants and Related Words
- Cryptogam (n): An individual plant belonging to the former division Cryptogamia.
- Ferns and mosses are examples of cryptogams.
- Cryptogamic (adj): Relating to or characteristic of cryptogams.
- The cryptogamic flora of the forest floor is diverse.
- Phanerogamia (n): The historical division for seed plants, the counterpart to Cryptogamia.
Synonyms
- Non-seed plants (descriptive term)
- Lower plants (archaic and imprecise term)
Notes on Meaning
- The core meaning refers to a specific, outdated taxonomic group. It does not have other common meanings in modern English.
- The word is derived from Greek ( meaning "hidden" and meaning "marriage"), referring to the "hidden" reproductive organs of these plants, which are not flowers or cones.
Noun
- in former classification systems: one of two major plant divisions, including all plants that do not bear seeds: ferns, mosses, algae, fungi