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talus collomia

Scientific Name: Collomia larsenii

Family: Polemoniaceae

Category: Dicot

Growth: Forb/herb

Duration: Perennial

Other Names:

       

Collomia larsenii: Talus Collomia

Collomia larsenii, commonly known as talus collomia or talus mountain-trumpet, is a flowering plant belonging to the phlox family (Polemoniaceae).

Taxonomy and Nomenclature

  • Scientific Name: Collomia larsenii (A. Gray) Payson
  • Common Names: Talus collomia, talus mountain-trumpet
  • Synonyms: Collomia debilis var. larsenii (A. Gray) Brand, Collomia debilis (S. Watson) Greene var. larsenii (A. Gray) Brand, C. debilis v. larsenii
  • Family: Polemoniaceae (Phlox family)
  • Kingdom: Plantae

Distribution and Habitat

  • Collomia larsenii is native to the Olympic Mountains and California.
  • It is typically found on rocky slopes and talus at high elevations, including limestone talus slopes, granitic talus slopes and rock slides.
  • Specific locations mentioned include Sheep Canyon on the Loowit Trail and Little Mt. Hoffman, California.

Morphological Characteristics and Growth Habits

  • Collomia larsenii is a perennial herb that forms mats of lavender to cream-colored flowers.
  • The mats range from 4-15 cm across and are often found in gravelly or cinder substrates.
  • It is a dicot with rhizomatous stems that grow interspersed among rock talus (sobols), allowing the plant to adapt to rockslides.
  • It has highly divided leaves (with 3-7 lobes, some or all cleft again).

Interactions with Other Organisms

  • Mentioned in relation to other plants such as: Bluehead gilia (Gilia capitata), Large-flowered collomia (Collomia grandiflora), Spreading phlox (Phlox diffusa), Cut-leaf daisy (Erigeron compositus)

Further Information

  • Specimens of Collomia larsenii can be viewed at PNW Herbaria Specimens.
  • More information about the biology, natural history, ecology, identification, and distribution of Collomia larsenii can be found on Discover Life.