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| Online Flora of the Maltese Islands by Stephen Mifsud |
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Erigeron canadensis (Canadian Horseweed) |
Erigeron canadensis (ASTERACEAE.)
Images for this profile are taken from the Maltese Islands after year 2000.
Website launch: Oct-2002
Taxonomic update: Aug-2026
Code update: Jul-2026 |
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| Nomenclature and General Information |
Species name : |
Erigeron canadensisL.
Published in Bull. Torrey Bot. Club 70: 632 (1943) |
Synonyms :
(basionym or principal syn.) |
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Plant Family : |
Asteraceae Bercht. & J.Presl (The Daisy or Sunflower Family) Previously included in Compositae
123 species from the Asteraceae family are recorded from the Maltese Islands. | English name(s) : | Canadian Horseweed, Canadian Fleabane |
Maltese name(s) : |
Żagħżigħa Kanadiża |
Status for Malta : |
Doubtful origin. It is not yet established if this species is native or not. |
Frequency : |
Very Common Common Frequent Scarce Rare Very rare Extinct |
Growth form : |
Germination type [info]: Dicotyledon
Raunkiaer lifeform [info]: Therophyte ( annual plants, herbaceous, die after fruiting/seeding stage ) |
Legal Protection : |
Not legally protected till the last update of this website (22/Aug/2025) |
Red List (1989) : |
Not listed in the Red Data Book of the Maltese Islands |
Flowering Time : |
September – December |
Colour of Flowers: |
Green or Inconspicuous |
Toxicity: |
Not particularly toxic |
Name Derivation : |
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Planting in rural areas : |
Can be planted in rural areas according to ERA Guidelines |
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Description, Habitat and Distribution | |
Botanical Description |
Annual 10-150 cm, patent-hirsute. Leaves numerous, narrow, the lower up to 10 x 1 cm, oblanceolate, petiolate, often deciduous, the others linear, at least the upper sessile Capitula less than 1 cm wide, generally numerous, in a long, paniculate inflorescence with a single axis. Involucre 3-4 mm, glabrous or nearly so. Female florets usually 25-45; ligules 0.5-1 mm, equalling or slightly exceeding the style and pappus. | |
Habitat in Europe |
Cultivated ground and waste places.
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Preferred habitat in Malta |
Arid wasteground and abandoned places in urban areas.
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Chromosome number(s) |
2n=18 | |
Distributional range |
Naturalized almost throughout Europe.
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Native region outside Europe |
(North America.)
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Distributional maps from various sources |
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Occurrences in Europe
(from Flora Europaea till 1993) |
Introduced in All Europe except Faroe Islands, Ireland, Iceland, Russia and former USSR, Svalbard archipelago
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Occurrences in Europe
(from Euro+Med Checklist till 2024)
Country codes
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[nAb(A N) nAE(G) nAg nAl Ar nAu(A L) Az(C F G J P S) nAz(L M T) nBe(B L) nBH Bl nBl(I M N) nBr nBu By Ca(C T) nCg nCo nCr nCs nCt nCy nDa nEs nFe nGa(C F) nGe Gg nGr aHb(E N) nHe nHo nHs(A G S) nHu nIJ nIr nIt nJu nLa nLe Li nLS nLt nLu nMa nMd(M) nMk Mo nNo nPo Rf(C E N NW S) nRf(CS K) nRm nSa nSi(S) nSk Sl Sn nSr nSu nSy nTcs Tn nTu(A E) nUk(K) Uk(U)]
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| Links & Further literature
(0 papers) |
Google Web |
Google Images |
Google Scholar |
Research Gate |
Wikipedia |
JSTOR |
GBIF |
Med Checklist |
Cat. of Life |
EoL |
IPNI |
World Flora Online |
Plants of the World Online |
Vienna Virt. Herb. |
RBGE Herbarium |
KEW Herbarium |
MNHN |
Garden Database |
IUCN |
TROPICOS |
Kindly Email if there are papers and publications about local
studies or information about this species to be included in the list above.
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Sales and Donations
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Sales of seeds of wild plant from Malta: Seeds of selected wild plant species may be available for academic studies, research purposes, or personal use. Please note that not all species can be supplied or exported. Availability is subject to seasonal seed production, stock levels, and applicable regulations, including Maltese legislation and CITES requirements where relevant. Protected and endemic species cannot be sold (at least without the relevant environmental permits).
How it works: First, submit a quotation request by completing the Online Quotation Form (link provided on the right side of this table). Once your request has been reviewed, you will receive confirmation regarding seed availability, export eligibility (where applicable), pricing, and any transport charges. Payments are accepted by Revolut, bank transfer (IBAN), or PayPal only; credit and debit card payments are not accepted.
Please note that local orders are currently not being accepted. Seek Maltese nurseries and NGOs for local orders.
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Online Quotation (Seeds)
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Online Purchase (Images)
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| Contribute Information or Report Errors |
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Atlas Flora Europaea
GBIF Distribution Map
WFO Distribution map
