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bryum moss

Scientific Name: Bryum algovicum var. algovicum

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 component of various ecosystems worldwide.

Taxonomy and Nomenclature

  • Scientific Name: Bryum Hedw.
  • Family: Bryaceae
  • Common Name(s): Bryum moss, thread-moss (for some species)

Some species within the genus, like Bryum argenteum, have the common name silvergreen bryum moss. Historically, the genus has been subject to splitting into smaller, segregate genera.

Distribution and Habitat

  • Bryum species are found globally, including locations like Scotland (Bryum dixonii), Antarctica (Bryum algens, Bryum argenteum), and the Netherlands (Baltic bryum).
  • They occupy diverse habitats, ranging from montane regions (Bryum dixonii) to woods, sheltered grassy areas (Rhodobryum roseum, formerly Bryum roseum), salt marshes (Baltic bryum), beaches, and even sidewalks (Bryum caespiticium).

Morphological Characteristics

  • Bryum mosses typically grow in tufts or patches.
  • Stems are mostly 1 to 3 cm tall.
  • Some species, like Bryum argenteum, form compact, pale green or silvery-grey tufts.
  • Dry plants of some species have corkscrew-like shoots, with leaves spirally twisted around the stem.
  • Some species such as Bryum flaccidum have leaves arranged in a rosette formation.

Ecological Role

  • Bryum argenteum can be an important component of Biological Soil Crusts (BSCs) in desert environments, showing desiccation tolerance.
  • In turfgrass environments, Bryum argenteum (silvery thread moss) can be considered a weed, and its control is an active area of research.

Genetic Information

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

Interactions with Other Organisms

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

Further Information

  • Jepson eFlora (California Moss eFlora)
  • Discover Life
  • Encyclopedia of Life
  • AusMoss