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discelium moss

Scientific Name: Discelium

Family: Disceliaceae

Category: Moss

Growth:

Duration:

Other Names:

       

Discelium nudum: The Flag-Moss

Discelium nudum, commonly known as flag-moss or discelium moss, is a unique and rare moss species.

Taxonomy and Nomenclature

  • Scientific Name: Discelium nudum (Dicks.) Brid.
  • Family: Disceliaceae
  • Genus: Discelium (the only genus in the family)
  • Rank: Species
  • Synonyms: Naked Flag Moss, Naked Weissia Moss
  • Other Names: Nuppisammal (Finnish common name)
  • Taxonomic Serial No. (TSN): 15835

Distribution and Habitat

  • Discelium nudum is widely distributed, though rare.
  • It has been found in Northern Scotland, southern Scotland, northern England, the English Midlands, Wales, southeast England, Northern Sweden (Vasterbotten), Czech Republic, and California.
  • This moss prefers soils rich in clay or silt and is often found on fine-textured mineral soils and unstable clay banks.

Morphological Characteristics and Growth Habits

  • Discelium nudum is a very tiny, brownish-green moss.
  • It appears to consist mainly of a capsule on a seta (stalk) emerging directly from the substrate.
  • It has a reduced brownish gametophyte and persistent green protonema, setting it apart from other North American mosses.
  • The plant is characterized by an extremely small, echlorophyllose (lacking chlorophyll), and ecostate (lacking a midrib) structure.

Ecological Role

  • Discelium nudum is an acrocarpous clay-inhabiting pioneer moss.
  • It is considered a pioneer species, quickly establishing itself on suitable substrates.

Considerations for Pets

  • This moss is very tiny and may be easily disturbed by pets.
  • As a rare moss that prefers soils high in clay, it can be found in soils, which may be a cause for concern with soil-eating animals.

Quirky Facts

  • Discelium nudum is described as producing sporophytes with long setae, similar to Buxbaumia and Tetradontium, making it a distinctive moss.

Further Information

  • ITIS (Integrated Taxonomic Information System): https://www.itis.gov/
  • CalPhotos: https://calphotos.berkeley.edu/
  • Ohio Moss and Lichen Association: ohiomosslichen.org