| | |
 |
|
| 
| ||
 |
|
|
|
 |
|
Wildlife, Animals, and Plants |
|
|||
|
INTRODUCTORY
ABBREVIATION:CIRARV SYNONYMS:No entry NRCS PLANT CODE [226]:CIAR4 COMMON NAMES:Canada thistle Californian thistle creeping thistle field thistle TAXONOMY:The currently accepted scientific name for Canada thistle is Cirsium arvense (L.) Scop. (Asteraceae) [42,75,81,92,94,103,107,127,135,178,187,209,233,249]. Canada thistle is extremely variable with regard to leaf division and vestiture, and it has been treated as several species, numerous varieties, or as a single highly polymorphic species [81]. Several authors recognize different varieties based primarily on differences in leaf morphology [42,75,81,94,233,239]. Voss [233] says it is doubtful that the variety designations are meaningful, and Cronquist and others [42] state that contemporary European botanists do not consider described variants of the species to be taxonomically significant. LIFE FORM:Forb FEDERAL LEGAL STATUS:No special status OTHER STATUS:As of this writing (2001), Canada thistle is listed as a noxious weed in at least 29 states in the U.S. and 7 Canadian provinces. See the Invaders or Plants databases for current information. AUTHORSHIP AND CITATION:Zouhar, Kris (2001, June). Cirsium arvense. In: Remainder of Citation
Related categories for SPECIES: Cirsium arvense | Canada Thistle |
 |
 | |
| |
| |
| Content on this web site is provided for informational purposes only. We accept no responsibility for any loss, injury or inconvenience sustained by any person resulting from information published on this site. We encourage you to verify any critical information with the relevant authorities. | |
| |
|
About Us | Contact Us | Terms of Use | Privacy | Links Directory |
| 1Up Info All Rights reserved. Site best viewed in 800 x 600 resolution. |
