D I S C O V E R    L I F E   
Bee Hunt! Odonata Lepidoptera 
  HomeAll Living ThingsIDnature guidesGlobal mapperAlbumsLabelsSearch
  AboutNewsEventsResearchEducationProjectsStudy sitesHelp


Conyza canadensis (L.) Cronquist
CANADIAN FLEABANE
Erigeron canadensis L sensu Linnaeus, C 1753; Erigeron pusillus Nutt; Conyza parva Cronquist; Erigeron canadensis L; Canadian horseweed; Erigeron canadensis; Nipplewort

Life   Plantae   Dicotyledoneae   Asteraceae   Conyza

Links
80x5 - 240x3 - 240x4 - 320x1 - 320x2 - 320x3 - 640x1 - 640x2
Set display option above.
Click on images to enlarge.
Conyza canadensis
© Copyright Bobby Hattaway 2011 · 5
Conyza canadensis
Conyza canadensis
© Copyright Bobby Hattaway 2011 · 5
Conyza canadensis

Conyza canadensis
© Copyright Bobby Hattaway 2011 · 5
Conyza canadensis
Conyza canadensis, inflorescence - frontal view of flower
© Copyright Steve Baskauf, 2002-2011 · 4
Conyza canadensis, inflorescence - frontal view of flower

Conyza canadensis, inflorescence - lateral view of flower
© Copyright Steve Baskauf, 2002-2011 · 4
Conyza canadensis, inflorescence - lateral view of flower
Conyza canadensis, stem - showing leaf bases
© Copyright Steve Baskauf, 2002-2011 · 4
Conyza canadensis, stem - showing leaf bases

Conyza canadensis, leaf - on upper stem
© Copyright Steve Baskauf, 2002-2011 · 4
Conyza canadensis, leaf - on upper stem
Conyza canadensis, whole plant - in flower - general view
© Copyright Steve Baskauf, 2002-2011 · 4
Conyza canadensis, whole plant - in flower - general view

Conyza canadensis, inflorescence - whole - unspecified
© Copyright Steve Baskauf, 2002-2011 · 4
Conyza canadensis, inflorescence - whole - unspecified
Conyza canadensis
© Copyright Mel Harte 2010 · 3
Conyza canadensis

Conyza canadensis
© Copyright Mel Harte 2010 · 3
Conyza canadensis
Conyza canadensis
© Copyright Mel Harte 2010 · 3
Conyza canadensis

Conyza canadensis
© Copyright Mel Harte 2010 · 3
Conyza canadensis
Conyza canadensis
© Copyright Mel Harte 2010 · 3
Conyza canadensis

Associates · map
FamilyScientific name @ source (records)
Aphididae  Aphis ( @ NCSU_ENT (6); CSCA_TCN (8)

Brachycaudus ( @ AMNH_PBI (2)

Myzus ( @ AMNH_PBI (1)

Prociphilus ( @ NCSU (24)

Uroleucon ( @ AMNH_PBI (8); NCSU (80)
Braconidae  Aphidius ( @ AMNH_PBI (3)

Lysiphlebus ( @ AMNH_PBI (50)
Coccinellidae  Coccinella septempunctata @ I_LB (6)

Cycloneda munda @ I_LB (6)

Harmonia axyridis @ I_LB (19)

Hippodamia convergens @ I_LB (4)

Hippodamia variegata @ PN- (1)

Olla v-nigrum @ I_LB (2)
Delphacidae  Pareuidella triloba @ UDCC_TCN (1)

Pissonotus binotatus @ NCSU (14); UDCC_NRI (9)
Derbidae  Omolicna mcateei @ UDCC_TCN (1)
Diaspididae  Aonidiella aurantii @ CSCA_TCN (1)

Hemiberlesia lataniae @ CSCA_TCN (1)
Halictidae  Agapostemon sericeus @ UCMS_ENT (1)

Agapostemon texanus @ PN- (1)

Agapostemon virescens @ UCMS_ENT (1)

Augochlorella aurata @ UCMS_ENT (1)

Lasioglossum laevissimum @ AMNH_BEE (1)

Lasioglossum pilosum @ AMNH_BEE (2)
Lygaeidae  Nysius coenosulus @ BPBM_TCN (4)

Nysius palor @ BPBM_TCN (3)
Megachilidae  Heriades variolosa @ AMNH_BEE (1)
Membracidae  Campylenchia latipes @ UDCC_TCN (4); NCSU (1)

Entylia carinata @ UDCC_TCN (6); NCSU (2)

Micrutalis calva @ UDCC_TCN (1); NCSU (9)

Spissistilus festinus @ UDCC_TCN (1)
Miridae  Aoplonema princeps @ AMNH_PBI (1)

Deraeocoris nebulosus @ MEMU_ENT (1)

Keltonia sulphurea @ MEMU_ENT (1)

Lopidea ute @ AMNH_ENT (8)

Lygus lineolaris @ MEMU_ENT (99)

Polymerus basalis @ AMNH_PBI (1); MEMU_ENT (5)

Pseudatomoscelis seriatus @ MEMU_ENT (1)

Slaterocoris stygicus @ AMNH_PBI (2)

Spanagonicus albofasciatus @ MEMU_ENT (1)

Taylorilygus apicalis @ AMNH_PBI (5); MEMU_ENT (85)
Pseudococcidae  Phenacoccus solenopsis @ CSCA_TCN (2)
Reduviidae  Repipta taurus @ MEMU_ENT (1)
Rhopalidae  Harmostes reflexulus @ MEMU_ENT (1)
_  Anthomyiidae @ PN- (1)

Chrysididae @ PN- (1)

Crabronidae @ PN- (3)

Gryillidae @ PN- (1)

Hymenoptera @ PN- (1)

Miridae @ PN- (3)

Protaphis middletoni @ NCSU_ENT (13)

Ripiphoridae @ PN- (1)

go to Discover Life's Facebook group

Following modified from Flora of Taiwan, National Taiwan University
   Top | See original

&pull 20q v4.662 20091102: Error 301 Moved Permanently http://tai2.ntu.edu.tw/udth/bin/fot1.exe/browse?bid=4&page=916

Following modified from Delaware Wildflowers
   Top | See original

Delaware Wildflowers  •  Scientific names

Conyza canadensis (L.) Cronq. ( Conyza canadensis var. pusilla , Erigeron canadensis , Erigeron pusillus ) Canada Horseweed
Asteraceae — Aster family
Native
Conyza canadensis
The front yard
August 2001

More information on this plant, from other sources.


Copyright David G. Smith

Delaware Wildflowers main page

Following modified from Malezas de Mexico, CONABIO
   Top | See original

http://conabioweb.conabio.gob.mx/malezasdemexico/asteraceae/conyza-canadensis/FICHAS/0PAGINA1.HTM ---> http://www.conabio.gob.mx/institucion/notfound/doctos/notfound.html
 
 
 
Conabio

Para ver correctamente esta página su navegador debe soportar CSS
 

No podemos encontrar esa pgina

Lo sentimos lo que intentó buscar no fue encontrado en nuestro sitio. Recuerde que la estructura del sito cambió desde el 30 de abril de 2002, para reportar una liga inexistente por favor, escriba un mensaje a conabio@xolo.conabio.gob.mx .

Presione aqu para nuestro mapa del sitio y bsqueda o vaya a nuestra pgina principal .

 

We cant find that page.

We are sorry, the page you attempted to find was not found on Conabios site, Remember that the structure site was change since april 29th, 2002, to report a broken link, please send a message to conabio@xolo.conabio.gob.mx .

Click here to our Site Map and Search or go to our home page site .

 

Following modified from Taiwan Biodiversity National Information Network
   Top | See original

You have requested an unaccepted/invalid name entry, the corresponding accepted/valid name is presented here as the result.
 
Kingdom Plantae  
 Phylum Magnoliophyta  
 Class Magnoliopsida  
 Order Asterales  
 Family Compositae  
 Genus Conyza  
  Conyza canadensis    (L.) Cronq 
Provider: Jung-Tai Chao 
hierarchy tree    download xml    download txt    Chinese Page    
Synonyms: Aster canadensis Caenotus canadensis Caenotus pusillus Conyza canadensis canadensis Conyzella canadensis Erigeron canadense Erigeron myriocephalus Erigeron setiferus Marsea canadensis Mytilus californianus Trimorpha canadensis   details
Citation: 台灣入侵及外來種圖鑑, 林業試驗所 2005; 陽明山國家公園外來入侵種手冊,陽管處,101年12月。
Name Code: 417676
   Invasive     
Suggested Link  
User Response:   upload Comments    upload Photo
 
Previous Page       Home Page

Following modified from Plants Database, United States Department of Agriculture
   Top | See original

http://plants.usda.gov/java/profile?symbol=COCA5 ---> https://plants.usda.gov/java/profile?symbol=COCA5
https://plants.usda.gov/java/profile?symbol=COCA5 ---> http://plants.usda.gov/core/profile?symbol=COCA5
http://plants.usda.gov/core/profile?symbol=COCA5 ---> https://plants.usda.gov/core/profile?symbol=COCA5
Link: Skip repetitive navigation links
USDA and NRCS Identifier NRCS Logo
USDA.gov Web Site PLANTS photo banner
PLANTS Home  about PLANTS  PLANTS Team  Partners of PLANTS  What  National Plant Data Team Web Site  Help using PLANTS  Contact PLANTS
 
 Search the PLANTS Web site
 Name Search

 State Search
 Advanced Search
 Search Help
PLANTS Topics
 
 Alternative Crops
 Characteristics
 Classification
 Cover Crops
 Culturally Significant
 Distribution Update
 Documentation
 Fact Sheets & Plant Guides
 Introduced, Invasive, and Noxious Plants
 Threatened & Endangered
 Wetland Indicator Status
 
PLANTS Image Gallery
 
 50,000+ Plant Images
 
Download PLANTS data
 
 Complete PLANTS Checklist
 State PLANTS Checklist
 Advanced Search Download
 Symbols for Unknown Plants
 NRCS State GSAT Lists
 NRCS State Plants Lists
 
Related tools
 
 Crop Nutrient Tool
 Ecological Site Information System
 PLANTS Identification Keys
 Plant Materials Web Site
 Plant Materials Publications
 USDA Plant Hardiness Map
 
 
You are here: Home / Plant Profile

Conyza canadensis (L.) Cronquist
Canadian horseweed

Image of Conyza canadensis

General Information
Symbol: COCA5
Group: Dicot
Family: Asteraceae
Duration: Annual
Biennial
Growth Habit : Forb/herb
Native Status : AK   I
CAN   N
HI   I
L48   N
NAV   N
PB   I
PR   N
SPM   N
VI   N
Other Common Names: horseweed
lani wela
Characteristics
Plant Guide (pdf) (doc)
Data Source and Documentation
About our new maps
Plants-NRCS Logos
green round image for nativity Native blue round image for introduced Introduced ocre round image for introduced and nativity Both white round image for no status Absent/Unreported
image for native, but no county data Native, No County Data image for introduced, but no county data Introduced, No County Data both introduced and native, but no county data Both, No County Data
Native Status:
lower 48 status L48    Alaska status AK    Hawaii status HI    Puerto Rico status PR    Virgin Islands status VI    Navassa Island NAV    Canada status CAN    Greenland status GL    Saint Pierre and Michelon status SPM    North America NA   

Images

click on a thumbnail to view an image, or see all the Conyza thumbnails at the Plants Gallery

Robert H. Mohlenbrock. USDA SCS. 1991. Southern wetland flora: Field office guide to plant species . South National Technical Center, Fort Worth. Provided by USDA NRCS Wetland Science Institute (WSI). Usage Requirements .

Brother Alfred Brousseau. Provided by St. Mary's College of California . ©St. Mary's College of California. Usage Requirements .

Patrick J. Alexander. Usage Requirements .

Patrick J. Alexander. Usage Requirements .

©Ted Bodner. James H. Miller and Karl V. Miller. 2005. Forest plants of the southeast and their wildlife uses. University of Georgia Press., Athens. Provided by University of Georgia Press . Scanned by Forestry Images . Usage Requirements .

©Ted Bodner. James H. Miller and Karl V. Miller. 2005. Forest plants of the southeast and their wildlife uses. University of Georgia Press., Athens. Provided by University of Georgia Press . Scanned by Forestry Images . Usage Requirements .

©Ted Bodner. James H. Miller and Karl V. Miller. 2005. Forest plants of the southeast and their wildlife uses. University of Georgia Press., Athens. Provided by University of Georgia Press . Scanned by Forestry Images . Usage Requirements .

USDA NRCS. Wetland flora: Field office illustrated guide to plant species. USDA Natural Resources Conservation Service. Provided by NRCS National Wetland Team . Usage Requirements .

slideshow

Synonyms

Classification

Click on a scientific name below to expand it in the PLANTS Classification Report.
Rank Scientific Name and Common Name
Kingdom Plantae – Plants
Subkingdom Tracheobionta – Vascular plants
Superdivision Spermatophyta – Seed plants
Division Magnoliophyta – Flowering plants
Class Magnoliopsida – Dicotyledons
Subclass Asteridae
Order Asterales
Family Asteraceae ⁄ Compositae – Aster family
Genus Conyza Less. – horseweed
Species Conyza canadensis (L.) Cronquist – Canadian horseweed

Subordinate Taxa

The Plants Database includes the following 3 subspecies of Conyza canadensis . Click below on a thumbnail map or name for subspecies profiles. Plant is native (blue) Native Plant is introduced Introduced Plant is introduced Native and Introduced Related taxa legend Distribution of <i>
Conyza canadensis</i>
(L.) Cronquist var. <i>
canadensis </i>
Conyza canadensis var. canadensis
Canadian horseweed Distribution of <i>
Conyza canadensis</i>
(L.) Cronquist var. <i>
glabrata</i>
(A. Gray) Cronquist
Conyza canadensis var. glabrata
Canadian horseweed Distribution of <i>
Conyza canadensis</i>
(L.) Cronquist var. <i>
pusilla</i>
(Nutt.) Cronquist
Conyza canadensis var. pusilla
Canadian horseweed

Legal Status

U.S. Weed Information
Conyza canadensis 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,and J.M. DiTomaso. 1997. Weeds of the Northeast . Cornell University Press. Ithaca, New York.
NE&GP Stubbendieck, J., G.Y. Friisoe,and 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.

Wetland Status

Interpreting Wetland Status

Related Links

More Accounts and Images
ARS Germplasm Resources Information Network (COCA5)
CalPhotos (COCA5)
Integrated Taxonomic Information System (COCA5)
Jepson Interchange (University of California - Berkeley) (COCA5)
Lady Bird Johnson Wildflower Center Native Plant Information Network (COCA5)
Native American Ethnobotany (University of Michigan - Dearborn) (COCA5)
USF Atlas of Florida Vascular Plants (COCA5)
University of Tennessee Herbarium (Distribution) (COCA5)
University of Washington Burke Museum (COCA5)
Related Websites
Arizona: abstract & image of horseweed (Conyza canadensis) (COCA5)
International Survey of Herbicide Resistant Weeds (WSSA) (COCA5)
Purdue University, Botany Department: no-till abstract & images (COCA5)
UC Davis, IPM: abstract & images (COCA5)
Virginia: abstract & image (COCA5)

Wildlife

Food

Source Large Mammals Small Mammals Water Birds Terrestrial Birds
Gee Moderate
Miller Minor

Cover

Source Large Mammals Small Mammals Water Birds Terrestrial Birds
Gee
Miller

Sources

Miller, J.H., and K.V. Miller. 1999. Forest plants of the southeast and their wildlife uses . Southern Weed Science Society.
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.

Description of Values

Value Class Food Cover
High Average 25-50% of diet Regular source of cover
Low 5-10% of diet Infrequently used as cover
Minor 2-5% of diet Sparsely used as cover
Moderate Average 10-25% of diet Occasional source of cover


 PLANTS Home | USDA.gov | NRCS | Site Map | Policies and Links
Accessibility Statement | Privacy Policy | Non-Discrimination Statement

Following modified from Flora of North America
   Top | See original

Link to Flora of North America home
 
All Floras       Advanced Search
FNA Vol. 20 Page 347 ,349, 350 Login | eFloras Home | Help
FNA | Family List | FNA Vol. 20 | Asteraceae | Conyza

4. Conyza canadensis (Linnaeus) Cronquist, Bull. Torrey Bot. Club. 70: 632. 1943.

Vergerette du Canada

Erigeron canadensis Linnaeus, Sp. Pl. 2: 863. 1753 (as canadense); Conyza canadensis var. glabrata (A. Gray) Cronquist; C. canadensis var. pusilla (Nuttall) Cronquist; C. parva Cronquist; E. canadensis var. pusillus (Nuttall) B. Boivin

Plants erect, (3—)50—200(—350+) cm, branched mostly distally. Leaves: faces usually glabrate (proximal margins ± ciliolate, hairs usually stiff, spreading and hispid on nerves, hairs erect); proximal blades oblanceolate to linear, 20—50(—100+) × 4—10(—15+) mm, toothed to entire; distal similar, smaller, entire. Heads usually in paniculiform, sometimes corymbiform arrays. Involucres 3—4 mm. Phyllaries usually glabrous, sometimes sparsely strigose (margins chartaceous to scarious); outer greenish to stramineous, lanceolate to linear, shorter; inner stramineous to reddish, lance-attenuate to linear. Receptacles 1—1.5(—3) mm diam. in fruit. Pistillate florets 20—30(—45+); corollas ± equaling or surpassing styles, laminae 0.3—1 mm. Disc florets 8—30+. Cypselae uniformly pale tan to light gray-brown, 1—1.5 mm, faces sparsely strigillose; pappi of 15—25, white bristles 2—3 mm. 2 n = 18.

Flowering year round, mostly summer—fall. Disturbed places; 0—2000 m; Alta., B.C., Man., N.S., Ont., P.E.I., Que., Sask.; Ala., Ariz., Ark., Calif., Colo., Conn., Fla., Ga., Idaho, Ill., Ind., Iowa, Kans., Ky., La., Maine, Md., Mass., Mich., Minn., Miss., Mo., Mont., Nebr., Nev., N.H., N.J., N.Mex., N.Y., N.C., N.Dak., Ohio, Okla., Oreg., Pa., R.I., S.C., S.Dak., Tex., Utah, Vt., Va., Wash., W.Va., Wis., Wyo.; Mexico; Central America; introduced in South America, Europe, Asia, Africa.

Conyza canadensis is thought to be native to North America and is now widely adventive, e.g., in South America, Europe, Asia, and Africa. Plants with stems glabrous and phyllaries red-tipped are sometimes treated as var. pusilla ; similar plants with stems glabrous and phyllaries stramineous (not red-tipped) are sometimes treated as var. glabrata .

Following modified from CalPhotos
   Top | See original


CalPhotos     Photo Database

 

Number of matches : 16
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
Conyza canadensis
Horseweed
ID: 0000 0000 1005 0512 [detail]
© 2005 Luigi Rignanese

Conyza canadensis
Conyza canadensis
Horseweed
ID: 0000 0000 1005 0518 [detail]
© 2005 Luigi Rignanese

Conyza canadensis
Conyza canadensis
Horseweed
ID: 0000 0000 0807 1465 [detail]
© 2007 Greta Murdoff

Conyza canadensis
Conyza canadensis
ID: 0000 0000 0510 1475 [detail]
© 2010 Louis-M. Landry

Conyza canadensis
Conyza canadensis
Canada Fleabane
ID: 0000 0000 0811 3185 [detail]
© 2011 Mary Winter

Conyza canadensis
Conyza canadensis
Horseweed
ID: 0000 0000 0412 0003 [detail]
© 2012 Richard Spellenberg

Conyza canadensis
Conyza canadensis
Horseweed
ID: 0000 0000 1215 0781 [detail]
© 2015 Richard Spellenberg

Conyza canadensis
Conyza canadensis
Horseweed
ID: 0000 0000 1215 0782 [detail]
© 2015 Richard Spellenberg

Conyza canadensis
Conyza canadensis
Horseweed
ID: 0000 0000 1215 0786 [detail]
© 2015 Richard Spellenberg

Conyza canadensis
Conyza canadensis
Horseweed
ID: 0000 0000 1215 0785 [detail]
© 2015 Richard Spellenberg

Conyza canadensis
Conyza canadensis
Horseweed
ID: 0000 0000 0216 1000 [detail]
© 2016 Barry Breckling

Conyza canadensis
Conyza canadensis
Horseweed
ID: 0000 0000 0216 1001 [detail]
© 2016 Barry Breckling

Conyza canadensis
Conyza canadensis
Horseweed
ID: 0000 0000 0216 1002 [detail]
© 2016 Barry Breckling

Conyza canadensis
Conyza canadensis
Canadian Horseweed
ID: 0000 0000 0916 2343 [detail]
© 2016 Richard Spellenberg

Conyza canadensis var. canadensis
Conyza canadensis var. canadensis
ID: 0000 0000 0510 1476 [detail]
© 2010 Louis-M. Landry

Conyza canadensis var. canadensis
Conyza canadensis var. canadensis
ID: 0000 0000 0510 1477 [detail]
© 2010 Louis-M. Landry

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 © 1995-2016 UC Regents. All rights reserved.

CalPhotos is a project of BSCIT      University of California, Berkeley

Following modified from CalPhotos
   Top | See original


CalPhotos     Photo Database

 

Number of matches : 2
Query: SELECT * FROM img WHERE ready=1 and taxon like "Conyza canadensis var. canadensis%" and (lifeform != "specimen_tag" OR lifeform != "Plant") ORDER BY taxon

Click on the thumbnail to see an enlargement

Conyza canadensis var. canadensis
Conyza canadensis var. canadensis
ID: 0000 0000 0510 1476 [detail]
© 2010 Louis-M. Landry

Conyza canadensis var. canadensis
Conyza canadensis var. canadensis
ID: 0000 0000 0510 1477 [detail]
© 2010 Louis-M. Landry

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 © 1995-2016 UC Regents. All rights reserved.

CalPhotos is a project of BSCIT      University of California, Berkeley

Updated: 2017-06-27 12:33:19 gmt
Discover Life | Top
© Designed by The Polistes Corporation