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Conyza canadensis (L. ) Cronquist Erigeron canadensis; Canadian horseweed; Erigeron canadensis L; Leptilon canadense L Britton; Conyza parva Cronquist; Erigeron pusillus Nutt; Leptilon pusillum Nutt Britton

Links

Higher taxa:  Life   Plantae   Dicotyledoneae   Asteraceae   Conyza   Global map IDnature guides: Dicotyledoneae, Guianas_flora, Hawaii_flora, Neotropical_flora, Panama_Dicotyledoneae, Plants_Chicago, Plants_Georgia_Clarke, POPA_USGA, Taiwan_Dicotyledoneae, Wildflowers Missouri Botanical Garden We parsed the following live from the Web into this page. Such content is managed by its original site and not cached on Discover Life. Please send feedback and corrections directly to the source. See original regarding copyrights and terms of use. Plants Database, United States Department of Agriculture Flora of Taiwan, National Taiwan University Malezas de Mexico, CONABIO Taiwan Biodiversity National Information Network CalPhotos

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© Pedro Tenorio-Lezama, 2001 Conyza canadensis, habitat	© Pedro Tenorio-Lezama, 2001 Conyza canadensis, plant and habitat
© Pedro Tenorio-Lezama, 2001 Conyza canadensis, leaves	© Pedro Tenorio-Lezama, 2001 Conyza canadensis
© Pedro Tenorio-Lezama, 2001 Conyza canadensis, flower buds	© Kay Yatskievych, 2003 Conyza canadensis, flower
© Copyright Steve Baskauf, 2002-2005 Conyza canadensis, Flower	© Copyright Steve Baskauf, 2002-2005 Conyza canadensis, Flower
© Copyright Steve Baskauf, 2002-2005 Conyza canadensis, Stem	© Copyright Steve Baskauf, 2002-2005 Conyza canadensis, Leaf
© Copyright Steve Baskauf, 2002-2005 Conyza canadensis, Whole plant	© Copyright Steve Baskauf, 2002-2005 Conyza canadensis, Flower

Names

Scientific source:       Integrated Taxonomic Information System

Following modified from Plants Database, United States Department of Agriculture

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Name Search name search type enter a search name Scientific Name Common Name Symbol State Search Advanced Search Search Help   Alternative Crops Characteristics Classification Culturally Significant Distribution Update Fact Sheets & Plant Guides Invasive and Noxious Weeds Links Plant Materials Publications Threatened & Endangered Wetland Indicator Status     40,000+ Plant Images Submit Your Digital Images     Complete PLANTS Checklist State PLANTS Checklist Advanced Search Download Symbols for Unknown Plants NRCS State GSAT Lists NRCS State Plants Lists PLANTS Posters     Crop Nutrient Tool Ecological Site Information System PLANTS Identification Keys Plant Materials Web Site Other NRCS Tech Resources VegSpec     You are here: Home / PLANTS Profile Printer-Friendly / Plug-Ins PLANTS Profile   Conyza canadensis (L.) Cronquist Canadian horseweed         Symbol:   COCA5   Group:   Dicot   Family:   Asteraceae   Duration:   Annual Biennial   Growth Habit:   Forb/herb   Native Status:   L48    N AK    I? HI    I PR    N VI    N CAN    N SPM    N Click on the image below to enlarge it and download a high-resolution JPEG file. Robert H. Mohlenbrock. USDA SCS. 1991. Southern wetland flora: Field office guide to plant species . South National Technical Center, Fort Worth. Courtesy of USDA NRCS Wetland Science Institute . Usage Requirements .   More Information: Characteristics Classification Data Source and Documentation   Images: Conyza canadensis (L.) Cronquist Click on a thumbnail to view an image, or see all the Conyza thumbnails at the PLANTS Gallery   Distribution: Conyza canadensis (L.) Cronquist View Native Status See U.S. county distributions (when available) by clicking on the map or the linked states below: USA ( AK , AL , AR , AZ , CA , CO , CT , DC , DE , FL , GA , HI , IA , ID , IL , IN , KS , KY , LA , MA , MD, ME , MI , MN , MO , MS , MT , NC , ND , NE , NH , NJ , NM , NV , NY , OH , OK , OR , PA , RI , SC , SD , TN , TX , UT , VA , VT , WA , WI , WV , WY ), USA+ (PR, VI), CAN (AB, BC, MB, NB, NF, NS, NT, ON, PE, QC, SK), FRA (SPM)   Related Taxa: Conyza canadensis (L.) Cronquist View 477 genera in Asteraceae , 6 species in Conyza or click below on a thumbnail map or name for species profiles. Conyza canadensis var. canadensis Canadian horseweed Conyza canadensis var. glabrata Canadian horseweed Conyza canadensis var. pusilla Canadian horseweed Native    Introduced   Classification: Conyza canadensis (L.) Cronquist Click on a scientific name below to expand it in the PLANTS Classification Report.     Kingdom Plantae – Plants Subkingdom Tracheobionta – Vascular plants Superdivision Spermatophyta – Seed plants Division Magnoliophyta – Flowering plants Class Magnoliopsida – Dicotyledons Subclass Asteridae Order Asterales Family Asteraceae – Aster family Genus Conyza Less. – horseweed Species Conyza canadensis (L.) Cronquist – Canadian horseweed   Threatened and Endangered Information: Conyza canadensis (L.) Cronquist The related entity italicized and indented below is 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 protected plant list for that location. Indiana : Conyza canadensis var. pusilla fleabane              Extirpated   U.S. Weed Information: Conyza canadensis (L.) Cronquist horseweed horseweed fleabane mares tail This plant 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. KY        Haragan, P.D. 1991. Weeds of Kentucky and adjacent states: a field guide . The University Press of Kentucky. Lexington, Kentucky. N'EAST        Uva, R.H., J.C. Neal, & J.M. DiTomaso. 1997. Weeds of the Northeast . Cornell University Press. Ithaca, New York. NE&GP        Stubbendieck, J., G.Y. Friisoe, & M.R. Bolick. 1994. Weeds of Nebraska and the Great Plains . Nebraska Department of Agriculture, Bureau of Plant Industry. Lincoln, Nebraska. SWSS        Southern Weed Science Society. 1998. Weeds of the United States and Canada. CD-ROM . Southern Weed Science Society. Champaign, Illinois. WSWS        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.   Introduced Information: Conyza canadensis (L.) Cronquist 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. Scientific Name= A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | all Common Name= A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | all   Wetland Indicator Status: Conyza canadensis (L.) Cronquist Nat. Ind. Reg. 1 Reg. 2 Reg. 3 Reg. 4 Reg. 5 Reg. 6 Reg. 7 Reg. 8 Reg. 9 Reg. 0 Reg. A Reg. C Reg. H UPL,FAC UPL FACU FAC- FACU FACU- UPL FACU UPL FACU FAC NO FACU UPL Interpreting Wetland Indicator Status   Wildlife Habitat Values: Conyza canadensis (L.) Cronquist   Large Mammals Small Mammals Water Birds Terrestrial Birds Source Large Mammals Food Large Mammals Cover Small Mammals Food Small Mammals Cover Water Birds Food Water Birds Cover Terrestrial Birds Food Terrestrial Birds Cover Gee Moderate               Miller Minor               Wildlife Habitat Values   Gee, K.L., M.D. Porter, S. Demarais, F.C. Bryant, and G.V. Vreede. 1994. White-tailed deer: Their foods and management in the Cross Timbers . Ardmore. Miller, J.H., and K.V. Miller. 1999. Forest plants of the southeast and their wildlife uses . Southern Weed Science Society.   More Accounts and Images: Conyza canadensis (L.) Cronquist View photographs from CalPhotos. View species account , photographs , and distribution from USF Atlas of Florida Vascular Plants. View species account from ARS Germplasm Resources Information Network (GRIN). View taxonomic account from Integrated Taxonomic Information System (ITIS) for ITIS Taxonomic Serial Number 37113. View species account and distribution map from Jepson Interchange (University of California - Berkeley). View species account and photographs from Lady Bird Johnson Wildflower Center Native Plant Information Network (NPIN). View species account from Native American Ethnobotany (University of Michigan - Dearborn). View photographs and distribution from University of Tennessee Herbarium. View species account, photographs, and distribution from University of Washington Burke Museum.   Related Web Sites: Conyza canadensis (L.) Cronquist Arizona: abstract & image of horseweed (Conyza canadensis) International Survey of Herbicide Resistant Weeds (WSSA) Purdue University, Botany Department: no-till abstract & images UC Davis, IPM: abstract & images Virginia: abstract & image     Time Generated: 02/09/2010 06:55 PM MST   PLANTS Home | USDA.gov | NRCS | Site Map | Policies and Links Accessibility Statement | Privacy Policy | Non-Discrimination Statement

Following modified from Flora of Taiwan, National Taiwan University

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Following modified from Malezas de Mexico, CONABIO

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Following modified from Taiwan Biodiversity National Information Network

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Kingdom Plantae    Phylum Magnoliophyta    Class Magnoliopsida    Order Asterales    Family Compositae    Genus Conyza     Conyza canadensis     (L.) Cronq.  var. canadensis  (L.) Cronq. 1943  Provider: Ching-I Peng  Synonyms： Erigeron canadensis ,  Leptilon canadense ,  Citation: Flora of Taiwan 2nd ed. 4: 916, 1998  Name Code: 202440 Suggested Link    Discover Life    Flora of Taiwan 2nd eBooks (National Taiwan University)   User Response:

Following modified from CalPhotos

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CalPhotos     Photo Database   Number of matches : 18 Query: SELECT * FROM img WHERE ready=1 and taxon like "Conyza canadensis%" and (lifeform != "specimen_tag" OR lifeform != "Plant") ORDER BY taxon Click on the thumbnail to see an enlargement Conyza canadensis Horseweed ID: 5207 1611 1114 0067 [detail] © 1995 Saint Mary's College of California Conyza canadensis Horseweed ID: 5207 1611 1114 0069 [detail] © 1995 Saint Mary's College of California Conyza canadensis Horseweed ID: 5207 1611 1114 0068 [detail] © 1995 Saint Mary's College of California Conyza canadensis Horseweed ID: 0000 0000 1005 0512 [detail] © 2005 Luigi Rignanese Conyza canadensis Horseweed ID: 0000 0000 1005 0518 [detail] © 2005 Luigi Rignanese Conyza canadensis ID: 0000 0000 1006 0525 [detail] © 2006 Steven Thorsted Conyza canadensis ID: 0000 0000 1006 0526 [detail] © 2006 Steven Thorsted Conyza canadensis ID: 0000 0000 1006 0527 [detail] © 2006 Steven Thorsted Conyza canadensis Horseweed ID: 0000 0000 0807 1465 [detail] © 2007 Greta Murdoff Conyza canadensis Horseweed ID: 0000 0000 0808 1932 [detail] © 2008 John Dittes Conyza canadensis Horseweed ID: 0000 0000 1008 1110 [detail] © 2008 Zoya Akulova Conyza canadensis Horseweed ID: 0000 0000 1108 0206 [detail] © 2008 Jorg Fleige Conyza canadensis Horseweed ID: 0000 0000 1208 1678 [detail] © 2008 Keir Morse Conyza canadensis Canada Horseweed ID: 0000 0000 1009 2889 [detail] © 2009 Barry Breckling Conyza canadensis Canada Horseweed ID: 0000 0000 1009 2890 [detail] © 2009 Barry Breckling Conyza canadensis Canada Horseweed ID: 0000 0000 1109 1650 [detail] © 2009 Zoya Akulova Conyza canadensis Horseweed ID: 0000 0000 1209 3706 [detail] © 2009 Neal Kramer Conyza canadensis Horseweed ID: 0000 0000 1209 3707 [detail] © 2009 Neal Kramer Using these photos: A variety of organizations and individuals have contributed photographs to CalPhotos. Please follow the usage guidelines provided with each image. Use and copyright information, as well as other details about the photo such as the date and the location, are available by clicking on the [detail] link under the thumbnail. See also: Using the Photos in CalPhotos .    Copyright © 1995-2010 UC Regents. All rights reserved. CalPhotos is a project of BSCIT     University of California, Berkeley