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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

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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 ( @ CSCA_TCN (8); NCSU_ENT (6)

Brachycaudus ( @ AMNH_PBI (2)

Myzus ( @ AMNH_PBI (1)

Prociphilus ( @ NCSU (24)

Uroleucon ( @ NCSU (80); AMNH_PBI (8)
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 @ UDCC_NRI (9); NCSU (14)
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 @ NCSU (9); UDCC_TCN (1)

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 @ MEMU_ENT (5); AMNH_PBI (1)

Pseudatomoscelis seriatus @ MEMU_ENT (1)

Slaterocoris stygicus @ AMNH_PBI (2)

Spanagonicus albofasciatus @ MEMU_ENT (1)

Taylorilygus apicalis @ AMNH_PBI (5); MEMU_ENT (85)
Peronosporaceae  Basidiophora entospora @ BPI (1)
Pseudococcidae  Phenacoccus solenopsis @ CSCA_TCN (2)
Pucciniaceae  Puccinia cyperi @ BPI (4)
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)

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Following modified from Delaware Wildflowers
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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

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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
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Following modified from Flora of North America
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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
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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: 2017-09-22 17:22:39 gmt
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