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disc lichen

Scientific Name: Buellia insignis

Family: Physciaceae

Category: Lichen

Growth: Lichenous

Duration:

Other Names:

       

Disc Lichen (Buellia spp.)

The term "Disc Lichen" or "Button Lichen" is commonly used to refer to lichens within the genus Buellia. This genus is quite diverse and widely distributed, encompassing approximately 450 species.

Considerations for Pets and Children

  • Some disc lichens produce small, disc-shaped fruiting bodies (apothecia) that could potentially be ingested.
  • The thallus (main body) of some lichens may have a crustose growth habit, attaching tightly to surfaces, which could present a scraping hazard.

Taxonomy and Nomenclature

  • Scientific Name: Buellia spp.
  • Common Names: Disc Lichen, Button Lichen, Black Disc Lichen, Common Button Lichen, Stilling's Disc Lichen
  • Family: Physciaceae (for at least one species, Buellia nigra)
  • Synonyms: Buelliopsis (for Buellia papillata)

Distribution and Habitat

  • The genus Buellia has a widespread distribution.
  • Specific locations mentioned include Howard County, Diamond Coast, Chiricahua National Monument, New Mexico, South Glenmore Park, and England.
  • Habitats can include rocks (acid rock), tree bark (live poplar tree), and clear-cut areas.

Morphological Characteristics

  • Lichens in this group have a disc-shaped apothecia (fruiting body), which may be black or yellow.
  • Apothecia can be epruinose (without a powdery surface coating).
  • The thallus (main body) of the lichen may have a necrotic thalline veil.
  • Growth habits include crustose (tightly attached to the substrate).

Interactions with Other Organisms

  • Reindeer lichen species are mentioned in the context of forest management.
  • Observed growing on a live poplar tree alongside Lecanora species.

Quirky Facts

  • Some disc lichens have been found to exhibit in vitro antimicrobial activity.
  • Lichen patterns have inspired designs, even appearing on dragonfly wings and business cards.
  • The Downs features a dedicated lichen trail.

Further Information

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