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Mandan ricegrass

Scientific Name: ×Achnella caduca

Family: Poaceae

Category: Monocot

Growth: Graminoid

Duration: Perennial

Other Names:

       

Achnella caduca: Mandan Ricegrass

Achnella caduca, commonly known as Mandan ricegrass, is a perennial graminoid (grass-like) plant. This species has been the subject of taxonomic debate, reflected in its multiple scientific names.

Taxonomy and Nomenclature

  • Scientific Name: Achnella caduca (Beal) Barkworth
  • Common Name: Mandan ricegrass
  • Family: Poaceae (grasses, gramines)
  • Genus: Achnella Barkworth – ricegrass
  • Rank: Species
  • Synonyms:
    • Stiporyzopsis caduca (Beal) B. L. Johnson & Rogler
    • Oryzopsis caduca (mentioned as an alternative label)

Distribution and Habitat

Mandan ricegrass has been observed in regions such as Montana and Nebraska. It has historical ties to the Mandan people, near locations such as the Slant Indian Village south of Mandan, North Dakota.

Morphological Characteristics

  • Growth Habit: Graminoid
  • Duration: Perennial (lives for more than two years)

Ecological Role

Indian ricegrass (Achnatherum hymenoides), related to Mandan ricegrass, is valued for stabilizing sites susceptible to wind erosion.

Interactions with Other Organisms

  • It is identified as a potential forage for animals.
  • The text notes relationships to Carex, Beetles, Feis, Sedge, Aster, Wildlife, and Moss.

Further Information

  • USDA PLANTS Database: Referenced with a link to a profile page (http://plants.usda.gov/java/profile?symbol=acca32).
  • National Plant Germplasm System: Holds accessions of Mandan ricegrass.