Cirsium pulcherrimum - (Rydb.) K. Schum.
Wyoming Thistle
Synonym(s): Cirsium pulcherrimum var. pulcherrimum
Taxonomic Status: Accepted
Related ITIS Name(s): Cirsium pulcherrimum (Rydb.) K. Schum. (TSN 36404)
Unique Identifier: ELEMENT_GLOBAL.2.158671
Element Code: PDAST2E2D0
Informal Taxonomy: Plants, Vascular - Flowering Plants - Aster Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Asterales Asteraceae Cirsium
Check this box to expand all report sections:
Concept Reference
Help
Concept Reference: Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Concept Reference Code: B94KAR01HQUS
Name Used in Concept Reference: Cirsium pulcherrimum
Taxonomic Comments: Kartesz (1994 and 1999) treats Cirsium pulcherrimum and C. aridum as distinct species. Flora of North America (2006) treats C. pulcherrimum broadly, including aridum material as C. pulcherrimum var. aridum. Cirsium pulcherrimum of Kartesz is equal to Cirsium pulcherrimum var. pulcherrimum of Flora of North America.
Conservation Status
Help

NatureServe Status

Global Status: G5
Global Status Last Reviewed: 01Jul1993
Global Status Last Changed: 08Jul1993
Rounded Global Status: G5 - Secure
Nation: United States
National Status: N5

U.S. & Canada State/Province Status
United States Colorado (SNR), Montana (S1), Nebraska (S1), Utah (SNR), Wyoming (S4)

Other Statuses

NatureServe Global Conservation Status Factors

Range Extent Comments: Eastern Montana, south to Wyoming, n Colorado, ne Utah, nw Nebraska and west to se Idaho.

Other NatureServe Conservation Status Information

Distribution
Help
Global Range: Eastern Montana, south to Wyoming, n Colorado, ne Utah, nw Nebraska and west to se Idaho.

U.S. States and Canadian Provinces
Color legend for Distribution Map

U.S. & Canada State/Province Distribution
United States CO, MT, NE, UT, WY

Range Map
No map available.


U.S. Distribution by County Help
State County Name (FIPS Code)
MT Powder River (30075)
NE Scotts Bluff (31157)*
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
10 Middle Powder (10090207)+, Middle North Platte-Scotts Bluff (10180009)+*, Pumpkin (10180013)+*
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
Help
General Description: Taprooted perennial with 1-few erect or ascending stems that are arachnoid-tomentose or sometimes glabrate. Flowers are pink to purple, 18-25 mm long, tubes 7-9 mm, throats 5.5-7.5 mm, lobes 4-8 mm; style tips 3-5.5 mm. The 1 to several heads are borne singly or in 2-3-headed clusters at the tips of the main stem and branches in an open, congested, or flat-topped fashion, heads sometimes also in present in distal axils. Peduncles 0-15 cm. Leaf blades are linear to oblong, oblanceolate, or elliptic, 5-25 0.6-7 cm, unlobed and merely spinulose or spiny-dentate to regularly pinnatifid, typically with 5-8 pairs of lobes, well separated, and usually with broad, U-shaped sinuses to crowded, linear to triangular-ovate, ascending-spreading to retrorse, merely spinulose to coarsely dentate or few lobed, primary spines are slender, 2-7 mm long. Lower leaf surfaces are usually densely arachnoid-tomentose, while upper surfaces are typically green, glabrous or less commonly thinly to densely gray-tomentose; basal leaves often present at flowering, spiny winged-petiolate; principal cauline well distributed along stem, gradually reduced upwards, lower leaves usually winged-petiolate, while mid and upper leaves typically are sessile, leaves decurrent along stem for 1.5-3.5 cm.
Involucres are ovoid to campanulate, 1.8-2.7 1-2 cm, thinly arachnoid-tomentose or glabrate. Bracts are in 6-7 series, imbricate, green or with a dark subapical patch or appendage, linear to linear-lanceolate, margins entire, abaxial faces with narrow glutinous ridge; outer and middle bases appressed, apical appendages spreading to stiffly ascending, linear-lanceolate to acicular, entire, spines spreading or ascending, stout, 2-7 mm, often flattened; apices of inner stiffly erect or sometimes flexuous, narrow, flat. Pappus is 14-16 mm long. (adapted from FNA treatment vol 19).

Habitat Comments: Rocky upland prairies or open pine woodlands.
Economic Attributes Not yet assessed
Help
Management Summary Not yet assessed
Help
Population/Occurrence Delineation Not yet assessed
Help
Population/Occurrence Viability
Help
U.S. Invasive Species Impact Rank (I-Rank) Not yet assessed
Help
Authors/Contributors
Help
NatureServe Conservation Status Factors Edition Date: 02Jul1993
NatureServe Conservation Status Factors Author: Skello, M.

Botanical data developed by NatureServe and its network of natural heritage programs (see Local Programs), The North Carolina Botanical Garden, and other contributors and cooperators (see Sources).

References
Help
  • Flora of North America Editorial Committee. 2006a. Flora of North America North of Mexico. Vol. 19. Magnoliophyta: Asteridae, part 6: Asteraceae, part 1. Oxford University Press, New York. xxiv + 579 pp.

  • Great Plains Flora Association (R.L. McGregor, coordinator; T.M. Barkley, ed., R.E. Brooks and E.K. Schofield, associate eds.). 1986. Flora of the Great Plains. University Press of Kansas, Lawrence, Kansas. 1392 pp.

  • Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.

  • Little, E.L., Jr. 1981. Atlas of the United States trees. Vol. 6. Supplement. Miscellaneous Publication No. 1410. U.S. Forest Service, Washington, DC. 30 pp.

Use Guidelines & Citation

Use Guidelines and Citation

The Small Print: Trademark, Copyright, Citation Guidelines, Restrictions on Use, and Information Disclaimer.

Note: All species and ecological community data presented in NatureServe Explorer at http://explorer.natureserve.org were updated to be current with NatureServe's central databases as of November 2016.
Note: This report was printed on

Trademark Notice: "NatureServe", NatureServe Explorer, The NatureServe logo, and all other names of NatureServe programs referenced herein are trademarks of NatureServe. Any other product or company names mentioned herein are the trademarks of their respective owners.

Copyright Notice: Copyright © 2017 NatureServe, 4600 N. Fairfax Dr., 7th Floor, Arlington Virginia 22203, U.S.A. All Rights Reserved. Each document delivered from this server or web site may contain other proprietary notices and copyright information relating to that document. The following citation should be used in any published materials which reference the web site.

Citation for data on website including State Distribution, Watershed, and Reptile Range maps:
NatureServe. 2017. NatureServe Explorer: An online encyclopedia of life [web application]. Version 7.1. NatureServe, Arlington, Virginia. Available http://explorer.natureserve.org. (Accessed:

Citation for Bird Range Maps of North America:
Ridgely, R.S., T.F. Allnutt, T. Brooks, D.K. McNicol, D.W. Mehlman, B.E. Young, and J.R. Zook. 2003. Digital Distribution Maps of the Birds of the Western Hemisphere, version 1.0. NatureServe, Arlington, Virginia, USA.

Acknowledgement Statement for Bird Range Maps of North America:
"Data provided by NatureServe in collaboration with Robert Ridgely, James Zook, The Nature Conservancy - Migratory Bird Program, Conservation International - CABS, World Wildlife Fund - US, and Environment Canada - WILDSPACE."

Citation for Mammal Range Maps of North America:
Patterson, B.D., G. Ceballos, W. Sechrest, M.F. Tognelli, T. Brooks, L. Luna, P. Ortega, I. Salazar, and B.E. Young. 2003. Digital Distribution Maps of the Mammals of the Western Hemisphere, version 1.0. NatureServe, Arlington, Virginia, USA.

Acknowledgement Statement for Mammal Range Maps of North America:
"Data provided by NatureServe in collaboration with Bruce Patterson, Wes Sechrest, Marcelo Tognelli, Gerardo Ceballos, The Nature Conservancy-Migratory Bird Program, Conservation International-CABS, World Wildlife Fund-US, and Environment Canada-WILDSPACE."

Citation for Amphibian Range Maps of the Western Hemisphere:
IUCN, Conservation International, and NatureServe. 2004. Global Amphibian Assessment. IUCN, Conservation International, and NatureServe, Washington, DC and Arlington, Virginia, USA.

Acknowledgement Statement for Amphibian Range Maps of the Western Hemisphere:
"Data developed as part of the Global Amphibian Assessment and provided by IUCN-World Conservation Union, Conservation International and NatureServe."

NOTE: Full metadata for the Bird Range Maps of North America is available at:
http://www.natureserve.org/library/birdDistributionmapsmetadatav1.pdf.

Full metadata for the Mammal Range Maps of North America is available at:
http://www.natureserve.org/library/mammalsDistributionmetadatav1.pdf.

Restrictions on Use: Permission to use, copy and distribute documents delivered from this server is hereby granted under the following conditions:
  1. The above copyright notice must appear in all copies;
  2. Any use of the documents available from this server must be for informational purposes only and in no instance for commercial purposes;
  3. Some data may be downloaded to files and altered in format for analytical purposes, however the data should still be referenced using the citation above;
  4. No graphics available from this server can be used, copied or distributed separate from the accompanying text. Any rights not expressly granted herein are reserved by NatureServe. Nothing contained herein shall be construed as conferring by implication, estoppel, or otherwise any license or right under any trademark of NatureServe. No trademark owned by NatureServe may be used in advertising or promotion pertaining to the distribution of documents delivered from this server without specific advance permission from NatureServe. Except as expressly provided above, nothing contained herein shall be construed as conferring any license or right under any NatureServe copyright.
Information Warranty Disclaimer: All documents and related graphics provided by this server and any other documents which are referenced by or linked to this server are provided "as is" without warranty as to the currentness, completeness, or accuracy of any specific data. NatureServe hereby disclaims all warranties and conditions with regard to any documents provided by this server or any other documents which are referenced by or linked to this server, including but not limited to all implied warranties and conditions of merchantibility, fitness for a particular purpose, and non-infringement. NatureServe makes no representations about the suitability of the information delivered from this server or any other documents that are referenced to or linked to this server. In no event shall NatureServe be liable for any special, indirect, incidental, consequential damages, or for damages of any kind arising out of or in connection with the use or performance of information contained in any documents provided by this server or in any other documents which are referenced by or linked to this server, under any theory of liability used. NatureServe may update or make changes to the documents provided by this server at any time without notice; however, NatureServe makes no commitment to update the information contained herein. Since the data in the central databases are continually being updated, it is advisable to refresh data retrieved at least once a year after its receipt. The data provided is for planning, assessment, and informational purposes. Site specific projects or activities should be reviewed for potential environmental impacts with appropriate regulatory agencies. If ground-disturbing activities are proposed on a site, the appropriate state natural heritage program(s) or conservation data center can be contacted for a site-specific review of the project area (see Visit Local Programs).

Feedback Request: NatureServe encourages users to let us know of any errors or significant omissions that you find in the data through (see Contact Us). Your comments will be very valuable in improving the overall quality of our databases for the benefit of all users.