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bryum moss

Scientific Name: Bryum warneum

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 over a thousand described species, Bryum may be the largest moss genus in the world, though some species have been reclassified into segregate genera.

Considerations for Pets

  • Several Bryum species grow in tufts or patches, potentially attracting attention from pets who enjoy exploring different textures.

Taxonomy and Nomenclature

  • Scientific Name: Bryum Hedw.
  • Family: Bryaceae
  • Synonyms:
    • Rose moss: (Rhodobryum roseum formerly Bryum roseum)
  • Examples:
    • Bryum dixonii Cardot ex W.E.Nicholson (Dixon's threadmoss)
    • Bryum argenteum Hedw. (Silvergreen bryum moss)
    • Bryum capillare
    • Bryum miniatum Lesq. (Red thread-moss or Glossy red bryum moss)
    • Bryum muehlenbeckii (Muehlenbeck's bryum moss)
    • Bryum sandbergii
    • Bryum dichotomum, also known as Bryum bicolor
    • Bryum pseudotriquetrum
    • Bryum coronatum
    • Bryum algovicum var. algovicum Sendtn. ex C. Mll.
    • Bryum aeneum Blytt ex Bruch & Schimp. in B.S.G.

Distribution and Habitat

  • Bryum dixonii is endemic to Scotland and occupies montane habitats.
  • Bryum argenteum is cosmopolitan.
  • Bryum capillare was observed overlooking Alum Creek in Delaware, Ohio.
  • Bryum algens is found in Antarctica.
  • Baltic bryum grows on grazed salt marshes in the Netherlands.

Morphological Characteristics and Growth Habits

  • Bryum mosses grow in tufts or patches.
  • Stems are usually 1 to 3 cm tall.
  • Dry plants often have corkscrew-like shoots, with leaves spirally twisted around the stem.
  • Bryum argenteum forms compact, silvery-grey tufts or cushions.
  • Long-leaved thread moss is reddish-green.
  • Bryum flaccidum grows with its leaves arranged in a rosulate pattern.
  • Bryum argenteum spores are yellow with many oil droplets.

Ecological Role

  • Bryum argenteum is an important component of Biological Soil Crusts (BSCs) in the Gurbantunggut desert.
  • Silvery thread moss (Bryum argenteum) can be problematic on putting greens.

Genetic and Cytological Information

  • The RAPD technique (Random Amplified Polymorphic DNA) has been used to assess genetic diversity in Bryum pseudotriquetrum.
  • Sex ratios in expressing and nonexpressing shoots for the cosmopolitan moss Bryum argenteum have been studied.

Interactions with Other Organisms

  • Bryum argenteum depends on epiphytic bacteria for freezing protection in Antarctica.
  • Waitea circinata is a fungal pathogen that affects Bryum.

Quirky Facts

  • Bryum argenteum is desiccation-tolerant.

Further Information

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