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bryum moss

Scientific Name: Bryum pseudocapillare

Family: Bryaceae

Category: Moss

Growth: Nonvascular

Duration:

Other Names:

       

Bryum: A Diverse Genus of Mosses

Bryum is a large and widespread genus of mosses belonging to the family Bryaceae. With potentially over a thousand described species, it represents a significant portion of the moss diversity found across the globe.

Taxonomy and Nomenclature

  • Scientific Name: Bryum Hedw.
  • Family: Bryaceae
  • Common Names: Bryum Moss
  • Synonyms: Mentions of changes in taxonomy suggest that certain species have been moved to segregate genera by Spence. For example, Rhodobryum roseum was formerly Bryum roseum.

Distribution and Habitat

  • Bryum species occupy a wide range of habitats, from montane regions (e.g., Bryum dixonii in Scotland) to coastal areas (Lake Winnipeg) and even Antarctic deserts (Bryum argenteum).
  • Specific species like Baltic bryum are found on grazed salt marshes in the Netherlands.
  • Bryum capillare was observed at bluff overlooking Alum Creek in Delaware Ohio.

Morphological Characteristics

  • Bryum mosses typically grow in tufts or patches.
  • Stems are generally 1 to 3 cm tall.
  • Bryum argenteum forms very close tufts or cushions, appearing as pale green or almost white.
  • Some species, like Bryum flaccidum, have leaves arranged in a rosette.
  • Dry plants may exhibit corkscrew-like shoots, with leaves spirally twisted around the stem.

Ecological Role

  • Bryum argenteum is an important component of Biological Soil Crusts (BSCs) in desert environments, like the Gurbantunggut desert, due to its desiccation tolerance.
  • Some species, such as Bryum argenteum (silvery thread moss), can become problematic in managed turfgrass environments, leading to management considerations for its control.

Genetic Information

  • RAPD (Random Amplified Polymorphic DNA) techniques have been used to assess genetic diversity within Bryum pseudotriquetrum.

Interactions with Other Organisms

  • Bryum argenteum exhibits dependence on epiphytic bacteria for freezing protection in Antarctic environments.
  • Waitea circinata is identified as a fungal pathogen affecting turfgrasses, with potential implications for Bryum species growing in similar environments.

Further Resources

  • Jepson eFlora for CA Vascular Plants, University of California
  • Encyclopedia of Life
  • Discover Life
  • AusMoss