Carduus pycnocephalus L.
Italian plumeless thistle
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Click on the image below to enlarge it and download a high-resolution
JPEG file.
Brother Alfred Brousseau. Courtesy of St. Mary's College of California. ©St. Mary's College of California. Usage Requirements.
Any use of copyrighted images requires notification of the copyright holder.
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Images:
Carduus pycnocephalus L.
See all the Carduus thumbnails at the PLANTS Gallery
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Distribution:
Carduus pycnocephalus L.
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See U.S. county distributions (when available) by clicking on the map or the linked states below:
USA (AL, AR, CA, HI, ID, NY, OR, SC, TX, WA) |
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Related Taxa:
Carduus pycnocephalus L.
View
477 genera in Asteraceae,
6 species in Carduus
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Classification:
Carduus pycnocephalus L.
Click on a scientific name below to expand it in the PLANTS
Classification Report.
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Noxious Weed Information:
Carduus pycnocephalus L.
This plant and the related entities italicized and indented below are listed by the U.S. federal government or a state. Common names are from state and federal lists. Click on a place
name to get a complete noxious weed list for that location,
or click here for a composite list of all
Federal and State Noxious Weeds.
| Arkansas: |
| Carduus |
| thistle |
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Noxious weed |
| California: |
| Italian thistle |
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C list (noxious weeds) |
| Iowa: |
| Carduus |
| thistle |
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Primary noxious weed |
| Oregon: |
| Italian thisle |
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"B" designated weed |
| Italian thisle |
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Quarantine |
| Washington: |
| Italian thistle |
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Class A noxious weed |
| Italian thistle |
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Noxious weed seed and plant quarantine |
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U.S. Weed Information:
Carduus pycnocephalus L.
Italian thistle
compact-headed thistle
Carduus
thistle
This plant and the related entity italicized and indented above can be weedy or invasive according to the authoritative sources noted below. This plant
may be known by one or more common names in different
places, and some are listed above. Click on an acronym
to view each weed list, or click here for a
composite list of Weeds of the U.S.
| STATE |
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Assorted authors.
200_.
State noxious weed lists for 46 states.
State agriculture or natural resource departments.
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| Cal-IPC |
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California Invasive Plant Council.
2006.
California Invasive Plant Inventory. Cal-IPC Publication 2006-02 (February 2007).
California Invasive Plant Council.
Berkeley, California.
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| WSWS |
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Whitson, T.D. (ed.) et al.
1996.
Weeds of the West.
Western Society of Weed Science in cooperation with Cooperative Extension Services, University of Wyoming.
Laramie, Wyoming.
630pp.
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Introduced Information:
Carduus pycnocephalus L.
This plant is introduced to some part of the PLANTS
Floristic Area, though it may be native in other parts. Click on
link below for a partial or complete list of PFA introduced plants.
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More Accounts and Images:
Carduus pycnocephalus L.
View photographs from CalPhotos.
View species account from ARS Germplasm Resources Information Network (GRIN).
View taxonomic account from Integrated Taxonomic Information System (ITIS) for ITIS Taxonomic Serial Number 35788.
View species account and distribution map from Jepson Interchange (University of California - Berkeley).
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Related Web Sites:
Carduus pycnocephalus L.
MT-Center for Invasive Plant Management
The Nature Conservancy: Wildland Weeds Management & Research Program
Victoria - Natural Resources & Environment: Landcare Notes
WA-Noxious Weed List & Information
Weed Science Society of America
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