Cirsium texanum

Cirsium texanum is a North American species of plants in the thistle tribe within the sunflower family. Common names include Texas thistle, Texas purple thistle or southern thistle.[2] The species is native to northern Mexico (Coahuila, Durango, Nuevo León, San Luis Potosí, Tamaulipas) and the southern Great Plains of the south-central United States (primarily Texas, Oklahoma, and eastern New Mexico with additional populations in Louisiana, Arkansas, and Missouri).[3][4]

Cirsium texanum
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Cirsium
Species:
C. texanum
Binomial name
Cirsium texanum
Synonyms[1]
  • Carduus austrinus Small
  • Carduus filipendulus (A.Gray) Rydb.
  • Carduus helleri Small
  • Cirsium austrinum (Small) E.D.Schulz
  • Cirsium helleri (Small) Cory

Cirsium texanum is a biennial or perennial herb up to 80 cm (32 inches) tall. Leaves have small, narrow spines along the edges. Flower heads are sometimes produced one at a time, sometimes in small groups, each head with light purple disc florets but no ray florets.[2]

References
  1. The Plant List, Cirsium texanum Buckley
  2. Flora of North America, Texas or Texas purple or southern thistle, Cirsium texanum Buckley
  3. Biota of North America Program 2014 county distribution map
  4. CONABIO. 2009. Catálogo taxonómico de especies de México. 1. In Capital Nat. México. CONABIO, México D.F..


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