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didymodon moss

Scientific Name: Didymodon

Family: Pottiaceae

Category: Moss

Growth:

Duration:

Other Names:

       

Didymodon Mosses: A Diverse Genus

Didymodon is a genus of mosses belonging to the Pottiaceae family. These mosses are found in a variety of habitats around the world.

Considerations for Pets

  • Some Didymodon species grow in tufts or patches, which could be tempting for pets to nibble.

Nomenclature and Taxonomy

  • Scientific Name: Didymodon Hedw.
  • Family: Pottiaceae
  • Synonyms: Some species were formerly classified under the genus Barbula (e.g., Barbula fallax, Barbula nicholsonii, Barbula nigrescens).
  • Various species and subspecies exist within the Didymodon genus, including:
    • Didymodon acutus
    • Didymodon asperifolius
    • Didymodon australasiae
    • Didymodon baii
    • Didymodon brachyphyllus and its variety Didymodon brachyphyllus var. brachyphyllus
    • Didymodon canoae
    • Didymodon cordatus
    • Didymodon eckeliae
    • Didymodon fallax and its variety Didymodon fallax var. fallax, as well as the form Didymodon fallax var. reflexus
    • Didymodon ferrugineus
    • Didymodon hegewaldiorum
    • Didymodon mamillosus
    • Didymodon maschalogenus
    • Didymodon michiganensis
    • Didymodon nicholsonii
    • Didymodon nigrescens
    • Didymodon norrisii
    • Didymodon reedii
    • Didymodon rigidulus and its variety Didymodon rigidulus var. icmadophilus
    • Didymodon sinuosus
    • Didymodon tomaculosus
    • Didymodon tophaceus
    • Didymodon vinealis and its variety Didymodon vinealis var. brachyphyllus

Common Names

  • Didymodon Moss (general)
  • 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.
  • Specific locations mentioned include:
    • Europe
    • Austrian Alps
    • Southern Norway
    • Turkey
    • British Isles (Didymodon reedii)
    • Inner Mongolia Autonomous Region of China (Didymodon baii)
    • Tibet, China
    • Northwest Territories and Labrador in Canada
    • Chihuahua in Mexico
    • Japan
    • Assam
    • Bhutan
    • United States
    • California (Didymodon norrisii)
    • Borrego Palm Canyon, Anza Borrego Desert State Park, San Diego County, California
    • Antarctica
    • Australia: Victoria
    • Chile
    • Greenland
    • Iceland
    • Mexico: Baja
    • Oregon: Juniper Canyon
  • Terricolous (ground-dwelling) species are common.

Morphological Characteristics

  • Acrocarpous mosses (having erect, terminal fruiting bodies).
  • Leaves are lanceolate to narrowly lanceolate with entire (smooth) margins.
  • Shoots can range in size:
    • Typical shoots of some species are 0.5 to 3 cm tall.
    • Leaves can be 3 to 4 mm in length.
    • Some species grow in patches or tufts less than 1 cm tall.
  • Coloration varies:
    • Olive-green, often brownish on the lower part.
    • Deep green, sometimes yellowish.

Quirky Facts

  • Didymodon maschalogenus was only recognized as a distinct species in 1981.
  • Some Didymodon species are very similar to each other, making identification challenging.
  • The leaves of Didymodon sinuosus are 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