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Pacific hairgrass

Scientific Name: Deschampsia holciformis

Family: Poaceae

Category: Monocot

Growth: Graminoid

Duration: Perennial

Other Names:

       

Pacific Hairgrass (Deschampsia cespitosa subsp. holciformis)

Pacific Hairgrass, scientifically known as Deschampsia cespitosa subsp. holciformis, is a beautiful tufted bunchgrass native to the Pacific Northwest. It's appreciated for its fine-textured, green foliage and is considered an elegant ornamental grass in gardens.

Taxonomy and Nomenclature

  • Scientific Name: Deschampsia cespitosa subsp. holciformis (J. Presl) W.E. Lawr.
  • Common Names: Pacific Hairgrass, Pacific Tufted Hair-grass, Tufted Hairgrass, Pacific reed grass
  • Genus: Deschampsia
  • Species: cespitosa
  • Subspecies: holciformis
  • Family: Poaceae (Grass family)
  • Synonyms: Deschampsia holciformis J. Presl, Deschampsia caespitosa ssp holciformis

Distribution and Habitat

  • Native to the Pacific Northwest, ranging from British Columbia to Monterey Bay.
  • Common in the Pacific coast states.
  • Found in wet and intermittently flooded areas such as tidal mudflats and estuaries.
  • Typically grows on moist sites between 5,000 and 13,000 ft, but can also occur on drier sites at its upper limit.

Morphological Characteristics and Growth Habits

  • Cool season, leafy, densely tufted perennial bunch grass.
  • Tussock-forming grass.
  • Grows 1 to 2 feet tall and 1 foot wide.

Ecological Role

  • In the Pacific Northwest, tufted hairgrass can form pure stands in wet areas.

Further Information

  • NatureServe: Globally vulnerable (G3G4) status.
  • Discover Life: Biology, natural history, ecology, identification and distribution information.