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acaulon moss

Scientific Name: Acaulon muticum

Family: Pottiaceae

Category: Moss

Growth: Nonvascular

Duration:

Other Names:

       

Acaulon muticum: Rounded Pygmy-moss

Acaulon muticum, commonly known as Rounded Pygmy-moss or acaulon moss, is a small moss belonging to the Pottiaceae family.

Taxonomy and Nomenclature

  • Scientific Name: Acaulon muticum (Brid.) Muell.Hal.
  • Family: Pottiaceae
  • Rank: Species
  • Synonyms:
    • Tortula acaulon (a former name for Phascum cuspidatum, the cuspidate earth-moss or toothed phascum moss, now considered a separate species)
    • Acaulon rufescens Jaeg. (also sometimes listed as Acaulon muticum var. rufescens)

Morphological Characteristics

  • Plants are often brown in appearance.
  • Typically 1-2 mm tall.
  • Appear to consist of a few concave upper leaves.
  • Leaves of Tortula acaulon (cuspidate earth-moss, previously classified as Phascum) are around 3 mm long and form green patches.

Distribution and Habitat

  • Acaulon eremicola, a related species, has been described from arid central Australia.

Genetic and Cytological Information

  • The sporophyte-gametophyte junction in Acaulon muticum involves the sporophyte foot and the surrounding gametophyte vaginula.

Ecological Role

  • Models have been used to study the relative abundance of Acaulon species in different soil and human footprint types within grassland and parkland regions.

Interactions with Other Organisms

  • Mention of sporophyte-gametophyte junction indicates interaction between generations within the same plant.

Further Information

  • USDA PLANTS Database: Mentions a map for Phascum acaulon (http://plants.usda.gov).
  • Encyclopedia of Life (EOL) contains information on Acaulon schimperianum and encourages contributions.
  • ResearchGate contains research on the sporophyte-gametophyte junction in the moss Acaulon muticum (Pottiaceae).