dilleniidae
Học thuậtThân thiện
Definition
- Noun:
- A taxonomic subclass of flowering plants: In botanical classification,
Dilleniidaeis a subclass of dicotyledonous plants. It comprises families of trees, shrubs, and herbs characterized by having flowers with either separate (polypetalous) or fused (gamopetalous) petals, and often with ovules attached to the ovary wall. It is a large group containing many significant plant families.
Usage Examples
- Noun:
- The order Malvales, which includes cotton and hibiscus, belongs to the subclass
Dilleniidae. - Botanists have debated the precise boundaries of the
Dilleniidae. - The classification system that uses
Dilleniidaeis primarily found in older botanical texts.
Advanced Usage
- In Taxonomic Context: The term is used almost exclusively in the context of scientific plant taxonomy. It represents a specific rank (subclass) within the division Magnoliophyta (flowering plants).
- Cronquist's system of classification recognized the
Dilleniidaeas one of six subclasses of dicots.
Variants and Related Words
- Dilleniales (n): An order of plants within the subclass Dilleniidae.
- Dilleniaceae (n): A family of flowering plants, often placed within the Dilleniidae, from which the subclass name is derived.
Synonyms
- Subclass Dilleniidae: The full, formal taxonomic name.
- (In some contexts): There is no direct common-language synonym. In modern phylogenetic systems (APG), the groups within Dilleniidae are redistributed, so equivalent clades like "rosids" and "asterids" cover many former members, but these are not synonyms.
Related Phrases/Idioms
- : As a highly specialized scientific term, is not used in idiomatic expressions or common phrasal verbs.
Noun
- a group of families of more or less advanced trees and shrubs and herbs having either polypetalous or gamopetalous corollas and often with ovules attached to the walls of the ovary; contains 69 families including Ericaceae and Cruciferae and Malvaceae; sometimes classified as a superorder