Conyza canadensis (L.) Cronquist

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Conyza canadensis

Photo: Bart Wursten
Haka Game Park, Cleveland Dam

Conyza canadensis

Photo: Bart Wursten
Haka Game Park, Cleveland Dam

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Synonyms: Erigeron canadensis L.
Erigeron floribundus (Kunth) Sch.Bip.
Common names: Canadian fleabane (English)
Frequency: Frequent
Status: Introduced
Erect annual herb. Stems simple or sparingly-branched, up to 1.2 m. Leaves linear to linear-lanceolate. Inflorescence a large terminal compound panicle. Capitula numerous, small, funnel-shaped with minute white ray-florets and yellow disk-florets.
Notes: Although less common than the related Conyza sumatrensis and Conyza bonariensis, it is still a widespread weed.
Derivation of specific name: canadensis: of Canada
Habitat: Disturbed and cultivated lands, favouring damp soils and high rainfall areas.
Altitude range: (metres)
Flowering time:
Worldwide distribution: Originating from temperate North America, but now a widespread weed.
Zimbabwe distribution: N,W,C,E,S
Growth form(s):
Endemic status:
Red data list status:
Insects associated with this species: Hyalites rahira rahira (Food plant)
Spot characters: Display spot characters for this species

Wild, H. (1975). The Compositae of the Flora Zambesiaca area. 4. Astereae. Kirkia 10(1) Pages 41 - 42.

Wild, H. (undated, c. 1955). Common Rhodesian Weeds ?Government of Rhodesia, Salisbury Page 68. as Erigeron floribundus (Includes a picture).


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Other sources of information about Conyza canadensis:

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Flora of Malawi: Conyza canadensis
Flora of Mozambique: Conyza canadensis
Flora of Zambia: Conyza canadensis

External websites:

African Plants: A Photo Guide (Senckenberg): Conyza canadensis
African Plant Database: Conyza canadensis
Biodiversity Explorer (Biodiversity of southern Africa): Conyza canadensis
BHL (Biodiversity Heritage Library): Conyza canadensis
EOL (Encyclopedia of Life): Conyza canadensis
ePIC (electronic Plant Information Center): Conyza canadensis
Flora Zambesiaca web site: Conyza canadensis
GBIF (Global Biodiversity Information Facility): Conyza canadensis
Google: Web - Images - Scholar
GRIN (Germplasm Resources Information Network): Conyza canadensis
IPNI (International Plant Names Index): Conyza canadensis
Ispot Southern Africa: Conyza canadensis
JSTOR Plant Science: Conyza canadensis
Kew Herbarium catalogue: Conyza canadensis
Mansfeld World Database of Agricultural and Horticultural Crops: Conyza canadensis
The Plant List (version 1.1): Conyza canadensis
Tropicos: Conyza canadensis

Copyright: Mark Hyde, Bart Wursten, Petra Ballings and Meg Coates Palgrave, 2002-18

Hyde, M.A., Wursten, B.T., Ballings, P. & Coates Palgrave, M. (2018). Flora of Zimbabwe: Species information: Conyza canadensis., retrieved 23 February 2018

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