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disc lichen

Scientific Name: Buellia oidalea

Family: Physciaceae

Category: Lichen

Growth: Lichenous

Duration:

Other Names:

       

Disc Lichens (Genus Buellia)

Lichens in the genus Buellia are commonly known as disc lichens or button lichens. This genus is quite diverse, encompassing approximately 450 different species.

Considerations for Pets

  • Some disc lichens have disc-shaped apothecia that can be yellow in color.

Considerations for Children

  • Some disc lichens have disc-shaped apothecia that can be yellow in color.

Taxonomy and Nomenclature

  • Scientific Name: Buellia De Not.
  • Common Names: Disc lichen, Button lichen, Common Button Lichen, Black Disc Lichen, Stilling's Disc Lichen, New Mexican disc lichen, Sunken disc lichen, Kola disk lichen.
  • Family: Physciaceae (mentioned in relation to Buellia nigra)
  • Synonyms: Buelliopsis papillata (for Buellia papillata)

Distribution and Habitat

  • The genus has a widespread distribution.
  • Observed on the Diamond Coast in 2012.
  • Found in Chiricahua National Monument (New Mexican disc lichen).
  • Observed in Howard Co. (Stilling's Disc Lichen)
  • Found growing on a live poplar tree in South Glenmore Park.
  • Found in England (Gray-green disc lichen).

Morphological Characteristics

  • Characterized by necrotic thalline material (thalline veil).
  • Possesses a black disc that is epruinose (lacking a powdery or frosty surface).
  • Apothecia (fruiting bodies) are variable in shape but commonly disc- or saucer-shaped.
  • The apothecium is a disc or cup-shaped fruiting body involved in sexual reproduction in lichens, and produces fungal spores.
  • The thallus (main body) can be yellow disc-like and arranged in circular formations.
  • Some species have discs that are strongly split, forming twisted rows of separate discs.
  • Growth forms are generally shaped like a disc, usually with a rim around the edge.

Ecological Role

  • Studies have investigated the re-establishment rate of reindeer lichen species following disc trenching in Pinus-lichen clear-cut areas.

Interactions with Other Organisms

  • Lichens are found growing on poplar trees alongside other Lecanora species.

Quirky Facts

  • The rotation of a Captive Lichen Disc was likened to a pattern from a dragonfly wing.

Antimicrobial Activity

  • Extracts from certain lichens in this group, using solvents like acetone, methanol, and ethanol, have shown in vitro antimicrobial activity.

Further Information

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