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disc lichen

Scientific Name: Buellia ocellata

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 with a wide geographical distribution.

Taxonomy and Nomenclature

  • Scientific Name: Buellia De Not.
  • Common Names: Disc lichen, Button lichen
  • Family: Physciaceae (mentioned in relation to Buellia nigra)
  • Kingdom: Fungi (inferred from the scientific classification of Buellia melanochroa)
  • Synonyms: Buelliopsis (e.g., Buelliopsis papillata for Buellia papillata)

Considerations for Pets

Some disc lichens have disc-shaped apothecia (fruiting bodies). These are often small and could potentially be ingested by pets exploring outdoors.

Distribution and Habitat

Buellia has a widespread distribution, being found in various locations such as:

  • Diamond Coast, South Africa (Black-disc lichen observation)
  • Chiricahua National Monument (New Mexican disc lichen)
  • South Glenmore Park (growing on a live poplar tree)
  • England (Gray-green disc lichen occurrences)

Morphological Characteristics

  • Thallus: May exhibit necrotic thalline material (thalline veil) that is thin and persistent.
  • Disc (Apothecia): Typically black, epruinose (without a powdery surface coating), and disc-shaped. Can be yellow and disk-like. Some species have concealed discs. Some species have discs with a rim around the edge.
  • Growth forms: Generally shaped like a disc, usually with a rim around the edge

Interactions with Other Organisms

  • Observed growing on a live poplar tree, alongside other lichens (Lecanora species).

Quirky Facts

  • Captive Lichen Disc: The mention of a "Captive Lichen Disc rotating" refers to a pattern from a dragonfly wing, used to create a captivating visual similar to a lichen disc. This highlights the visual appeal and unique patterns found in nature.

Further Information

  • Catalogue of Life: 2012 Annual Checklist
  • British Lichen Society (BLS) Lichen Database
  • ordabok.is (Icelandic dictionary)