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disc lichen

Scientific Name: Buellia capitis-regnum

Family: Physciaceae

Category: Lichen

Growth: Lichenous

Duration:

Other Names:

       

Disc Lichen (Genus *Buellia*)

Disc lichens, also known as button lichens, belong to the genus *Buellia*. This genus is quite diverse, encompassing approximately 450 species.

Considerations for Pets

  • Some species of *Buellia* produce disc-shaped fruiting bodies.

Considerations for Children

  • Some species of *Buellia* produce disc-shaped fruiting bodies.

Taxonomy and Nomenclature

  • Scientific Name: *Buellia* De Not.
  • Common Names: Disc lichen, Button lichen, Common Button Lichen, Black Disc Lichen, Stilling's Disc Lichen, Rock Disk Lichen
  • Family: Physciaceae (for at least one species, *Buellia nigra*)
  • Symbol: BUELL
  • Synonyms: Buelliopsis (for *Buellia papillata*)

Distribution and Habitat

  • The genus *Buellia* has a widespread distribution.
  • Observed on the Diamond Coast (South Africa).
  • Found in Chiricahua National Monument.
  • Observed in Howard County.
  • Observed in South Glenmore Park (growing on a live poplar tree).
  • England

Morphological Characteristics

  • The genus is characterized by necrotic thalline material (thalline veil).
  • Discs are typically black and epruinose (lacking a powdery surface covering).
  • Some species exhibit yellow, disc-shaped apothecia (fruiting bodies).
  • Apothecia are disc- or cup-shaped and used in lichen identification.
  • Growth forms are generally shaped like a disc, usually with a rim around the edge .

Species Examples

  • *Buellia amphidexia* Imshaug ex R.C. Harris
  • *Buellia capitis-regnum* W.A. Weber
  • *Buellia papillata* (also known as *Buelliopsis papillata*)
  • *Buellia stillingiana* (Stilling's Disc Lichen or Common Button Lichen)
  • *Buellia nigra* (Black Disc Lichen)
  • *Buellia imshaugii* (Imshaug's Disc Lichen)
  • *Buellia halonia*
  • *Buellia melanochroa*

Interactions with Other Organisms

  • Found growing on live poplar trees.
  • Reindeer lichen species affected by disc trenching in Pinus-lichen clear-cut areas.

Uses and Research

  • Extracts have been tested for antimicrobial and antifungal activity using disc diffusion methods.
  • Used in the study of erosive oral lichen planus, with buccal adhesive discs containing triamcinolone acetonide and chitosan.

Further Information

  • Catalogue of Life: 2012 Annual Checklist
  • British Lichen Society - BLS Lichen Database