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disc lichen

Scientific Name: Buellia vilis

Family: Physciaceae

Category: Lichen

Growth: Lichenous

Duration:

Other Names:

       

Disc Lichen (Buellia spp.) and Other Disc-Shaped Lichens

Lichens referred to as "disc lichens" or "button lichens" belong primarily to the genus Buellia, but other lichens with disc-shaped apothecia may also be referred to by this common name. This article explores characteristics and information known about lichens with this morphology.

Considerations for Pets

  • The text mentions that lichens can be extracted using acetone, methanol, and ethanol. While this does not directly indicate toxicity, it suggests the presence of chemical compounds that may warrant caution.

Considerations for Children

  • The text mentions "small disc-shaped apothecia", which may be of interest to small children.

Taxonomy and Nomenclature

  • Scientific Name: Primarily Buellia spp., but also includes lichens from other genera.
  • Common Names: Disc lichen, button lichen, black disc lichen, Common Button Lichen, Stilling's Disc Lichen, Rock Disk Lichen, sunken disc lichen
  • Family: Physciaceae (for Buellia nigra). Megasporaceae (mentioned in the context of a lichen family).
  • Synonyms: Buelliopsis papillata (for Disc Lichen - Buellia papillata).

Distribution and Habitat

  • The genus Buellia has a widespread distribution.
  • Observed in locations such as Diamond Coast, South Africa and Chiricahua National Monument.
  • Found growing on various substrates, including rocks ("Rock Disk Lichen") and live poplar trees.
  • Specific mention of lichens found on NEBC LICHEN WALK, June 5, 2004.

Morphological Characteristics

  • Characterized by disc-shaped apothecia (fruiting bodies involved in sexual reproduction).
  • Apothecia can be black, yellow, or brown in color.
  • Thallus (main body) can be crustose (closely attached to the substrate).
  • Some species exhibit a "thalline veil" of necrotic thalline material.
  • Apothecia can be epruinose (lacking a powdery surface coating) or pruinose (having a powdery coating).
  • Some species display strongly split discs, forming twisted rows.

Ecological Role

  • Mention of a study on the re-establishment rate of reindeer lichen species following disc trenching.

Interactions with Other Organisms

  • Lichens can exhibit antifungal activity.
  • They can be affected by excessive nutrient supply, leading to outgrowth in disc cultures.

Quirky Facts

  • Stilling's Disc Lichen is also known as Common Button Lichen.

Further Information

  • Catalogue of Life: 2012 Annual Checklist is mentioned as a data source.
  • ordabok.is is mentioned as an online dictionary.