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This variety is accepted, and its native range is Utah to Wyoming and Colorado.
A specimen from Kew's Herbarium

Native to:

Colorado, Utah, Wyoming

Cirsium clavatum var. americanum (A.Gray) D.J.Keil appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Rattan, V. [s.n.], California Cirsium americanum K000778233

First published in Sida 21: 211 (2004)

Accepted by

  • Roskov Y. & al. (eds.) (2018). Species 2000 & ITIS Catalogue of Life Naturalis, Leiden, the Netherlands.

Herbarium Catalogue Specimens
Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

Kew Backbone Distributions
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0