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Osterhout's thistle

Scientific Name: Cirsium osterhoutii

Family: Asteraceae

Category: Dicot

Growth: Forb/herb

Duration: Perennial

Other Names:

       

Osterhout's Thistle (Cirsium osterhoutii)

Also known as Jeweled Thistle, Osterhout's Thistle (Cirsium osterhoutii) is a forb/herb, meaning it is a non-woody plant that is not a grass. It is one of many species within the Cirsium genus, commonly known as thistles.

Considerations for Pets

  • According to the provided information, Osterhout's Thistle is not considered safe for dogs or cats.

Taxonomy and Nomenclature

  • Scientific Name: Cirsium osterhoutii (Rydb.) Petr.
  • Common Name: Osterhout's Thistle, Jeweled Thistle
  • Rank: Species
  • Family: Asteraceae
  • Synonym: Carduus osterhoutii Rydberg
  • Variety: Cirsium clavatum var. osterhoutii (Rydb.) D.J. Keil

Morphology and Growth Habits

  • Osterhout's Thistle is described as a forb/herb, meaning it's a non-woody plant that is not a grass.

Related Cirsium Species

  • Cirsium clavatum (M.E. Jones) Petr. - Fish Lake Thistle
  • Cirsium vulgare (bull thistle, common thistle, or spear thistle)
  • Cirsium ownbeyi - Ownbey's Thistle
  • Cirsium acarna - Soldier Thistle
  • Cirsium acaule - Stemless Thistle, Dwarf Thistle
  • Cirsium pallidum
  • Cirsium hydrophilum (Greene) Jepson - Suisun Thistle
  • Cirsium modestum (Osterhout) Cockerell - Lacy Thistle
  • Cirsium acuatum (Osterhout) Petrak - Gray Thistle, Tracy's Thistle, Wavyleaf Thistle
  • Cirsium douglasii DC. var. douglasii - Douglas' Thistle
  • Cirsium laterifolium (Osterhout) Petrak - Porcupine Thistle