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didymodon moss

Scientific Name: Didymodon fallax var. fallax

Family: Pottiaceae

Category: Moss

Growth: Nonvascular

Duration:

Other Names:

       

Didymodon Moss

Didymodon is a genus of mosses belonging to the family Pottiaceae. Several species within this genus are commonly referred to as "didymodon moss." This diverse group presents a fascinating subject for botanical study, with various species exhibiting unique characteristics and distributions.

Considerations for Pets

  • Some species of Didymodon are very small, only growing to 1mm in height, and could be ingested by curious pets.

Taxonomy and Nomenclature

  • Kingdom: Plantae
  • Family: Pottiaceae
  • Order: Pottiales
  • Synonyms: Several species were formerly classified under the genus Barbula (e.g., Barbula fallax is a synonym for Didymodon fallax).
  • Examples of Species:
    • Didymodon acutus
    • Didymodon asperifolius
    • Didymodon australasiae
    • Didymodon brachyphyllus (also listed as Didymodon vinealis var. brachyphyllus)
    • Didymodon canoae
    • Didymodon cordatus
    • Didymodon eckeliae
    • Didymodon fallax (also listed as Didymodon fallax var. fallax and Didymodon fallax var. reflexus)
    • Didymodon ferrugineus
    • Didymodon hegewaldiorum
    • Didymodon johansenii
    • Didymodon liae
    • Didymodon mamillosus
    • Didymodon maschalogenus
    • Didymodon michiganensis
    • Didymodon nicholsonii
    • Didymodon nigrescens
    • Didymodon norrisii
    • Didymodon reedii
    • Didymodon rigidulus (also listed as Didymodon rigidulus var. icmadophilus)
    • Didymodon sinuosus
    • Didymodon tomaculosus
    • Didymodon tophaceus
    • Didymodon vinealis (also listed as Barbula vinealis)

Common Names

  • Didymodon Moss
  • False Beard-moss
  • Nicholson's Beard-moss
  • Perthshire beardmoss (Didymodon mamillosus)
  • Rigid Didymodon Moss (Didymodon rigidulus var. icmadophilus)
  • Soft-tufted Beard-moss (Didymodon vinealis)
  • Black Didymodon Moss (Didymodon nigrescens)

Distribution and Habitat

  • Didymodon species are found worldwide, including:
    • Antarctica
    • Australia (Victoria)
    • The Austrian Alps
    • Assam
    • Bhutan
    • British Isles
    • California
    • Canada (Northwest Territories and Labrador)
    • Chile
    • China (Tibet)
    • Europe
    • Greenland
    • Iceland
    • Italy
    • Japan
    • Mexico (Baja California and Chihuahua)
    • Norway
    • Oregon
    • Peru
    • Turkey
    • United States
  • Specific locations mentioned include:
    • Anza Borrego Desert State Park, San Diego County, California (Borrego Palm Canyon)
    • Juniper Canyon, Oregon

Morphological Characteristics and Growth Habits

  • Didymodon mosses are acrocarpous, meaning they have an upright growth habit with the archegonia (female reproductive organs) located at the tips of the main stems.
  • Leaves are typically lanceolate to narrowly lanceolate with entire (smooth) margins.
  • Shoots can vary in size, with some species growing less than 1 cm tall, while others reach 0.5 to 3 cm.
  • Coloration ranges from deep green to yellowish, olive-green, and brownish.

Quirky Facts

  • Didymodon maschalogenus was only recognized as a distinct species in 1981.
  • Didymodon sinuosus is noted for sometimes having missing leaf tips.

Further Information

  • Flora of North America
  • GBIF (Global Biodiversity Information Facility)
  • USDA (United States Department of Agriculture)
  • CNPS Inventory of Rare and Endangered Plants (California Native Plant Society)