astreus hygrometricus
Noun: A species of gasteromycete fungus belonging to the earthstar family. It is characterized by its hygroscopic (moisture-responsive) outer spore case (exoperidium), which opens into a star-like shape when dry to expose the spore sac and closes when wet to protect it. The spore mass (gleba) inside is typically a pale tan color. This fungus is commonly found growing in sandy soils.
This term is used in scientific contexts, specifically in mycology (the study of fungi), to identify and describe this particular species of earthstar fungus.
- The sandy path was dotted with several specimens of .
- Under the microscope, the spores from the gleba were clearly visible.
- A key identifying feature of is how its rays open and close with changes in humidity.
- The binomial name follows the standard scientific convention of italicizing genus and species names.
- In formal taxonomic writing, the author citation "Astreus hygrometricus (Pers.) Morgan" may be used to credit the scientists who described and renamed the species.
- Earthstar: The common name for the group of fungi in the family Geastraceae, which includes the genus .
- Gasteromycete: A former taxonomic grouping for fungi that produce spores inside their fruiting bodies, like puffballs and earthstars.
- Hygroscopic: The property of absorbing moisture from the air, which describes the opening/closing mechanism of this fungus's outer layer.
- Barometer Earthstar (a common name referring to its weather-responsive nature).
- (an older, synonymized scientific name).
This term refers exclusively to a specific biological organism. It does not have different meanings in general language, idiomatic uses, or phrasal verbs. Its usage is confined to scientific and naturalist contexts.
- a common species of earthstar widely distributed in sandy soil; the gleba is a pale tan