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Vasey's thistle

Scientific Name: Cirsium hydrophilum var. vaseyi

Family: Asteraceae

Category: Dicot

Growth: Forb/herb

Duration: Biennial, Perennial

Other Names:

       

Cirsium hydrophilum and Relatives

This page provides information about Cirsium hydrophilum, a species of thistle endemic to California, as well as related plants mentioned in the provided text. It's important to note that the information here is based solely on the provided text and may not be exhaustive.

Considerations for Pets and Children

  • Several plants mentioned in the text are thistles, which are known to have prickly or thorny characteristics.

Taxonomy and Nomenclature

  • Scientific Name: Cirsium hydrophilum
  • Variety: Cirsium hydrophilum var. vaseyi
  • Common Names: Mt. Tamalpais thistle, Vasey's thistle, Suisun thistle
  • Synonyms/Related Species: The text also mentions Eryngium castrense, also known as Vasey's Coyote-thistle, which appears to be distinct but is referred to by a common name very similar to that of the thistle.

The text also includes references to these names (likely synonyms or misspellings, though it is not explicitly stated): Cnicus breweri, Eryngium vaseyi var. vaseyi.

Cirsium hydrophilum is within the Asteraceae or Composite or Sunflower Family.

Distribution and Habitat

  • Cirsium hydrophilum is endemic to California.
  • Cirsium hydrophilum var. vaseyi is known from approximately twenty occurrences on Mount Tamalpais in Marin County, California.
  • Habitat: vernal pools.

Morphological Characteristics

  • The plant is described as being 8 to 18 inches tall.
  • Eryngium vaseyi (Vasey's Coyote-thistle) is described as decumbent to ascending, branching horizontally.

Ecological Role

  • The presence of Vasey's coyote thistle in a vernal pool is mentioned in the context of potentially halting construction, suggesting it plays a significant ecological role, possibly as an indicator species or protected plant.

Quirky Facts

  • The text mentions an informal reception at the Thistle Marble Arch Hotel in London and refers to Thistle Generators being rescued from administration, showing the name 'Thistle' is used in different contexts besides plants.
  • One source references an individual named "Dr. Gary M. Vasey", and mentions "Gary Vasey" as an author, implying a connection between the plant name and a person.

Further Information

  • The text references the CTRMCenter News Conference 2015.
  • Vasey, M.C., V.T. Parker, L.M. Schile, J.C. Callaway &amp E.R. Herbert. 2012. Vegetation Constraints on population recruitment for a rare serpentine seep thistle.