Taxon: Cirsium undulatum (Nutt.) Spreng.

A declared aquatic or terrestrial noxious weed and/or noxious-weed seed in these U.S. states (see state noxious weed lists), with links to state information or web documents:

CA*°.

ªAquatic.

*Terrestrial.

°In seed.

Link to noxious weed information from

Common names:

• gray thistle   (Source: F NAmer ) – English
  
• pasture thistle   (Source: F NAmer ) – English
  
• wavy-leaf thistle   (Source: State Noxweed Seed ) – English
  

Economic importance:

• Weed: potential seed contaminant   (fide State Noxweed Seed)
  

More:

View ethnobotanical data from Moerman's Native American Ethnobotany Database

Distributional range:

• NORTHERN AMERICA (Check conservation status in U.S. & Canada in NatureServe Explorer database)
  Western Canada: Canada - Alberta, British Columbia, Manitoba, Saskatchewan
  Northeastern U.S.A.: United States - Indiana, Michigan
  North-Central U.S.A.: United States - Illinois, Iowa, Kansas, Minnesota, Missouri, Nebraska, North Dakota, Oklahoma, South Dakota, Wisconsin
  Northwestern U.S.A.: United States - Colorado, Idaho, Montana, Washington, Wyoming
  South-Central U.S.A.: United States - New Mexico, Texas
  Southwestern U.S.A.: United States - Arizona, California, Utah
  Northern Mexico: Mexico - Chihuahua, Coahuila, Durango, Sonora

• NORTHERN AMERICA (Check conservation status in U.S. & Canada in NatureServe Explorer database)
  Northeastern U.S.A.: United States - Pennsylvania
  Southeastern U.S.A.: United States - Georgia
  Southwestern U.S.A.: United States - California

References:

• Baldwin, B. G. et al., eds. The Jepson manual: vascular plants of California (on-line resource).
• Correll, D. S. & M. C. Johnston. 1970. Manual of the vascular plants of Texas.
• Cronquist, A. et al. 1972–. Intermountain flora.
• FNA Editorial Committee. 1993–. Flora of North America.
• Kartesz, J. T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland.
• Scoggan, H. J. 1978–1979. The flora of Canada, 4 vol.
• Seed Regulatory and Testing Branch, Agricultural Marketing Service, U.S.D.A. 1999. State noxious-weed seed requirements recognized in the administration of the Federal Seed Act.

More:

Search AGRICOLA article citation database for citations referencing Cirsium undulatum.

Search NCBI's Entrez search engine for PubMed citations referencing Cirsium undulatum.

Search Biodiversity Heritage Library for historical publications referencing Cirsium undulatum.

Synonyms:

• (≡) Carduus undulatus Nutt. (basionym)
  

Check other web resources for Cirsium undulatum (Nutt.) Spreng.:

• Flora of North America: Collaborative Floristic Effort of North American Botanists
• PLANTS: USDA-NRCS Database of Plants of the United States and its Territories
• BONAP: North American Plant Atlas of the Biota of North America Program
• TROPICOS: Nomenclatural and Specimen Database of the Missouri Botanical Garden
• ePIC: Electronic Plant Information Centre of Royal Botanic Gardens, Kew
• AGRICOLA: Article Citation Database or NAL Catalog of USDA's National Agricultural Library
• Entrez: NCBI's search engine for PubMed citations, GenBank sequences, etc.

Images:

• GRIN Images of germplasm accessions.
• Forestry Images: from www.forestryimages.org
• Fruits: Seed ID Workshop image, from Department of Horticulture and Crop Science, Ohio State University

More:

• Check PlantSystematics.org for additional images
• Images Note: Be advised that their identity may be inaccurate. Proper identification of a plant may require specialized taxonomic knowledge or comparison with properly documented herbarium material.

Abbreviations & symbols in GRIN Taxonomy

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