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Steen Mountain thistle
Scientific Name: Cirsium peckii
Family: Asteraceae
Category: Dicot
Growth: Forb/herb
Duration: Perennial
Other Names:
Steens Mountain Thistle (Cirsium peckii)
The Steens Mountain Thistle, scientifically known as Cirsium peckii, is a unique plant found in a specific region of the United States. It is also known as Peck's Thistle and Steen's Mountain Thistle.
Considerations for Pets
- As a thistle, it may have spines or prickles that could pose a risk to pets that brush against or attempt to ingest it.
Taxonomy and Nomenclature
- Scientific Name: Cirsium peckii L.F. Hend.
- Common Names: Steens Mountain Thistle, Peck's Thistle, Steen's Mountain Thistle, Ghost Thistle
- Family: Asteraceae (Aster or Sunflower Family)
- Synonym: Cirsium eatonii var. peckii (L.F. Hend.) D.J. Keil
- USDA Symbol: CIPE4
Distribution and Habitat
- The Steens Mountain Thistle is endemic to Steens Mountain in southeastern Oregon, specifically in Harney County.
- It is often found at high elevations, around 7000-9600 feet.
- The plant grows in the Mountain Big Sagebrush Zone.
Morphological Characteristics
- It is described as a forb/herb, a non-woody plant.
- The stem is erect, single, and unbranched, covered with long straight hairs.
- Leaves are lance-shaped, mostly hairless or with a few hairs on the midrib.
Quirky Facts
- The Steens Mountain Thistle grows only on Steens Mountain.
Further Information
- Discover Life hosts a page about the biology, natural history, ecology, identification, and distribution of Cirsium peckii.
- Eric Coombs at the Oregon Department of Agriculture has photographed this species.
- Additional information may be available from the Oregon Flora Project.