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Rydberg's thistle

Scientific Name: Cirsium rydbergii

Family: Asteraceae

Category: Dicot

Growth: Forb/herb

Duration: Perennial

Other Names:

       

Rydberg's Thistle (Cirsium rydbergii)

Cirsium rydbergii, commonly known as Rydberg's thistle or alcove thistle, is a perennial herb belonging to the sunflower family (Asteraceae).

Considerations for Pets

  • As a thistle, Cirsium rydbergii may have prickly or thorny characteristics.

Taxonomy and Nomenclature

  • Scientific Name: Cirsium rydbergii Petr.
  • Common Names: Rydberg's thistle, alcove thistle
  • Family: Asteraceae (Sunflower family)
  • Synonym: Cirsium lactucinum Rydberg
  • Rank: Species

Distribution and Habitat

  • Rydberg's thistle is a North American species.
  • It is found in the Colorado Plateau region.

Morphological Characteristics

  • Cirsium rydbergii is a perennial herb.
  • The leaves are deciduous.

Related Species

  • The text mentions other Cirsium species, including:
    • Cirsium neomexicanum (New Mexico thistle)
    • Cirsium vulgare (Bull thistle, common thistle, or spear thistle)
    • Cirsium rusbyi (Rusby's thistle)
    • Cirsium flodmanii (Flodman's thistle, prairie thistle)
    • Cirsium barnebyi (Barneby's thistle)
    • Cirsium cymosum (Peregrine thistle)
    • Cirsium acarna (Soldier thistle)
    • Cirsium acaule (Stemless thistle, dwarf thistle)
    • Cirsium scabrum (Rough thistle)