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dot lichen

Scientific Name: Arthonia glaucescens

Family: Arthoniaceae

Category: Lichen

Growth: Lichenous

Duration:

Other Names:

       

Dot Lichen

"Dot lichen" is a common name applied to lichens in the genera Arthonia or Micarea. "Dotted lichens" may refer to lichens in the genus Bacidia. Several species include "dot lichen" in their common name.

Considerations for Pets

  • The text mentions lichens "clinging" to surfaces. The adherence of lichen to surfaces and potential ingestion by pets could be considered.

Considerations for Children

  • The text indicates that lichens grow in small dots. The small size of lichen, in general, might be a consideration.

Taxonomy and Nomenclature

  • Kingdom: Fungi
  • Family: Arthoniaceae (for Arthonia and related genera) and Icmadophilaceae (for Dibaeis absoluta)
  • The text lists several lichens:
    • Arthonia arthonioides (Ach.) A.L. Sm. - Dot Lichen
    • Arthonia asteriscus Mll. Arg. - Dot Lichen
    • Dibaeis absoluta (Tuck.) Kalb & Gierl. - Pink Dot Lichen
    • Mycobilimbia pilularis - 'Dot Lichen'
    • Leptorhaphis epidermidis - Birchbark Dot Lichen
    • Leptorhaphis atomaria - Birchbark Dot Lichen
    • Micarea globulosella - Globe Dot Lichen
    • Bacidia rubella - Frosty-rimmed Dot Lichen
    • Scoliciosporum chlorococcum - City Dot Lichen (Synonym: Bacidia chlorococca)
    • Caloplaca arenaria - Granite firedot lichen
    • Cliostomum griffithii - Multicolored dot lichen
    • Arthonia exilis
    • Arthonia glebosa Tuck. - dot lichen

Distribution and Habitat

  • One lichen was noted on Palm tree bark, Bahia Honda Key, Florida, USA.
  • Another was noted growing on rocks in Mt. Rainier National Park.
  • The text mentions lichens in the New Orleans area and lichens on stone walls in Walden.

Morphological Characteristics

  • Mycobilimbia pilularis ('Dot Lichen') is described as a crustose lichen with a grayish green thallus without soredia or isidia and yellowy brown biatorine, convex apothecia.
  • Dibaeis absoluta (Pink Dot Lichen) has pink apothecia born on very short (ca. 1 mm) stalks.

Quirky Facts

  • The text references a headline: "I'm lichen it!" in an article about eating oak moss.

Resources

  • Encyclopedia of Life
  • Catalogue of Life
  • ResearchGate
  • Smithsonian Institution, National Museum of Natural History, Department of Botany
  • USDA
  • MO, ToL, BHL, WikiSpecies