parmelia
Definition
Noun: 1. A genus of lichens: Parmelia is the type genus of the family Parmeliaceae. It is a large genus consisting primarily of foliose (leaf-like) lichens that are commonly found in alpine and arctic habitats, as well as on trees and rocks in other regions.
Examples
- The old oak tree was covered in a crust of grey .
- Scientists study species as bioindicators of air quality.
- A key characteristic of many lichens is their lobe-shaped, leafy thallus.
Advanced Usage
- In scientific taxonomy: The genus name is used in the binomial nomenclature of lichen species (e.g., ).
- In ecology: The presence or absence of sensitive species can indicate levels of atmospheric pollution, particularly sulfur dioxide.
Variants and Related Words
- Parmeliaceae (n): The large family of lichens to which the genus belongs.
- Parmelioid (adj): Describing lichens that share morphological characteristics with the genus .
Synonyms
- Foliose lichen (descriptive term): A general term for the leaf-like growth form characteristic of this genus.
- There are no direct common-name synonyms, as it is a scientific genus name. It may be loosely referred to as a "shield lichen" or "crottle" in specific regional or historical contexts for certain species.
Notes on Meaning
- Scientific vs. Common Use: is primarily a scientific term used in biology, ecology, and taxonomy. It is not typically used in everyday conversation.
- Historical Context: Many lichens originally classified under the broad genus have been reclassified into newer, more specific genera based on modern molecular analysis. The genus is now more narrowly defined than in past centuries.
Noun
-
type genus of the Parmeliaceae; a large genus of chiefly alpine foliaceous lichens
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