- Conyza sumatrensis
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Conyza sumatrensis 
Scientific classification Kingdom: Plantae (unranked): Angiosperms (unranked): Eudicots (unranked): Asterids Order: Asterales Family: Asteraceae Tribe: Astereae Genus: Conyza Species: C. sumatrensis Binomial name Conyza sumatrensis
(Retz.) E. WalkerConyza sumatrensis is an annual herb native to North America[1] but naturalised worldwide.
In certain countries the plant has started to exhibit resistance to herbicides.[2]
In Britain, of the alien British Conyza species, this is the second most abundant (after C. canadensis) and is typically found in London and the South East of England. It was first recorded in London by Brian Wurzell in 1984,[3] and noted in France at Saint-Sozy (Dordogne) in 2006.[4]
Plant Details
Type Details Comments Scientific Name Conyza sumatrensis Synonyms: Conyza albida, Conyza altissima, Conyza nandina Common Names fleabane, tall fleabane, broad-leaved fleabane, white horseweed, Sumatran fleabane, Guernsey fleabane Family Asteraceae Seasonality Annual Height 1-2 metres when fully grown (summer/autumn) Description Flowers are white rather than purple-pink. Its leaves are like dandelion leaves, but longer, thinner and more like primrose leaves in colour and texture. Its seeding heads are like dandelions, but straw coloured and smaller.[5] Toxicity [citation needed] Threat to other plants It poses a significant threat to wildlife conservation areas and other reserves. Its invasive nature and competitive ability could suppress the native flora in the more open habitats it favours. Origin North America Naturalised South America
Europe[6]
Africa[7]
Asia[8]
Australasia[9]References
- ^ Conyza sumatrensis, Tall Fleabane, Royal Botanic Gardens, New South Wales, Australia
- ^ Sumatran Fleabane, Weedscience.org
- ^ Fleabane in London
- ^ Mark Galliott (June 2006). "France – The Dordogne". Tour Report. Naturetrek Wildlife Holidays. Archived from the original on 2007-09-29. http://web.archive.org/web/20070929015715/http://www.naturetrek.co.uk/reports/France%20-%20The%20Dordogne%20-%20tour%20report%20(May%2006).pdf. Retrieved 2011-10-18.
- ^ See pictures at International Environmental Weed Foundation
- ^ Fleabane in Holland
- ^ Flora of Zimbabwe: Conyza sumatrensis
- ^ Sumatran Fleabane in Japan
- ^ Pacific Island Ecosystems at Risk (PIER): Conyza sumatrensis
External links
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