Specimen image via iDigBio · BY
Placidium
Sign in to savePlacidium is a genus of crustose to squamulose to almost foliose lichens. The genus is in the family Verrucariaceae. Most members grow on soil (are terricolous), but some grow on rock (saxicolous). The fruiting bodies are perithecia, flask-like structures immersed in the lichen body (thallus) with only the top opening visible, dotting the thallus. Lichen spot tests are all negative. Members of the genus lack rhizines, but otherwise resemble members of the genus Clavascidium.
Species
GENUS
- KingdomFungi
- PhylumAscomycota
- ClassEurotiomycetes
- OrderVerrucariales
- FamilyVerrucariaceae
via GBIF
Museum specimens
- Specimen records
- 422
- With media
- 132
- Family
- Verrucariaceae
- Collections
- ASU, LSU, USU, NY, DUKE, UC
- Recorded in
- MéXico, United States, South Africa, Paraguay
Wikidata facts
- Instance of
- taxon
- Parent taxon
- Verrucariaceae
- Image
- Placidium lacinulatum Plouharnel 2010-01-16 24.jpg
Show 5 more facts
- taxon name
- Placidium
- taxon rank
- genus
- taxonomic type
- Placidium michelii
- Commons category
- Placidium
- taxon author citation
- A. Massal.
via Wikidata · CC0
~2 min read
Encyclopedic overview
3 sectionsContents
- Taxonomy
- Species
- References
Placidium is a genus of crustose to squamulose to almost foliose lichens. The genus is in the family Verrucariaceae. Most members grow on soil (are terricolous), but some grow on rock (saxicolous). The fruiting bodies are perithecia, flask-like structures immersed in the lichen body (thallus) with only the top opening visible, dotting the thallus. Lichen spot tests are all negative. Members of the genus lack rhizines, but otherwise resemble members of the genus Clavascidium.
Members of the genus are commonly called stiplescale lichens or earthscale.
Excerpted from Wikipedia’s “Placidium” article, available under the CC BY-SA 4.0 licence.