Erigeron sumatrensis (syn. Conyza sumatrensis) is an annual herb probably native to South America, but widely naturalised in tropical and subtropical regions, and regarded as an invasive weed in many places.[1][2][3] In the British Isles it is known as Guernsey fleabane.[4] Other common names include fleabane, tall fleabane, broad-leaved fleabane, white horseweed, and Sumatran fleabane.[citation needed]
When fully grown (in summer or autumn), Erigeron sumatrensis reaches one to two metres in height. 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] In certain countries the plant has started to exhibit resistance to herbicides.[6]
Distribution
It probably originates from South America, but is now naturalised in North America, Europe,[7] Africa,[8] Asia,[9] and Australasia.[10] It poses a significant threat to wildlife conservation areas and other reserves. In Britain, of the non-native former Conyza species, it is the second most abundant (after Erigeron canadensis) and is typically found in London and the South East of England. It was first recorded in London by Brian Wurzell in 1984,[11] and noted in France at Saint-Sozy (Dordogne) in 2006.[12]
Gallery
References
^ ab"Erigeron sumatrensis Retz". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 23 August 2020.
^Flora of China, 苏门白酒草 su men bai jiu cao Erigeron sumatrensis Retzius
^Pruski, J.F. & G. Sancho. 2006. Conyza sumatrensis var. leiotheca (Compositae: Astereae), a new combination for a common neotropical weed. Novon 16(1): 96–101
erigeron, sumatrensis, conyza, sumatrensis, annual, herb, probably, native, south, america, widely, naturalised, tropical, subtropical, regions, regarded, invasive, weed, many, places, british, isles, known, guernsey, fleabane, other, common, names, include, f. Erigeron sumatrensis syn Conyza sumatrensis is an annual herb probably native to South America but widely naturalised in tropical and subtropical regions and regarded as an invasive weed in many places 1 2 3 In the British Isles it is known as Guernsey fleabane 4 Other common names include fleabane tall fleabane broad leaved fleabane white horseweed and Sumatran fleabane citation needed Erigeron sumatrensisFruitingScientific classificationKingdom PlantaeClade TracheophytesClade AngiospermsClade EudicotsClade AsteridsOrder AsteralesFamily AsteraceaeGenus ErigeronSpecies E sumatrensisBinomial nameErigeron sumatrensisRetz Synonyms 1 List Aster ambiguus E H L KrauseBaccharis ivifolia BlancoConyza albida Willd ex Spreng Conyza altissima Naudin ex DebeauxConyza ambigua DC Conyza bonariensis var microcephala Cabrera CabreraConyza bonariensis f subleiotheca Cuatrec Conyza erigeroides DC Conyza floribunda var subleiotheca Cuatrec J B MarshallConyza groegeri V M BadilloConyza naudinii BonnetConyza sumatrensis Retz E WalkerDimorphanthes ambigua C PreslDimorphanthes floribunda Cass Erigeron albidus Willd ex Spreng A GrayErigeron ambiguus Sch Bip Erigeron bonariensis var microcephalus CabreraErigeron crispus subsp naudinii Bonnet BonnierErigeron musashensis MakinoErigeron naudinii Bonnet HumbertEschenbachia ambigua Moris Contents 1 Description 2 Distribution 3 Gallery 4 References 5 External linksDescription EditWhen fully grown in summer or autumn Erigeron sumatrensis reaches one to two metres in height 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 In certain countries the plant has started to exhibit resistance to herbicides 6 Distribution EditIt probably originates from South America but is now naturalised in North America Europe 7 Africa 8 Asia 9 and Australasia 10 It poses a significant threat to wildlife conservation areas and other reserves In Britain of the non native former Conyza species it is the second most abundant after Erigeron canadensis and is typically found in London and the South East of England It was first recorded in London by Brian Wurzell in 1984 11 and noted in France at Saint Sozy Dordogne in 2006 12 Gallery Edit References Edit a b Erigeron sumatrensis Retz Plants of the World Online Royal Botanic Gardens Kew Retrieved 23 August 2020 Flora of China 苏门白酒草 su men bai jiu cao Erigeron sumatrensis Retzius Pruski J F amp G Sancho 2006 Conyza sumatrensis var leiotheca Compositae Astereae a new combination for a common neotropical weed Novon 16 1 96 101 BSBI List 2007 xls Botanical Society of Britain and Ireland Archived from the original xls on 2015 06 26 Retrieved 2014 10 17 See pictures at International Environmental Weed Foundation Sumatran Fleabane Weedscience org Fleabane in Holland Flora of Zimbabwe Conyza sumatrensis Sumatran Fleabane in Japan Pacific Island Ecosystems at Risk PIER Conyza sumatrensis Fleabane in London Archived from the original on 2011 06 04 Retrieved 2008 03 01 Mark Galliott June 2006 France The Dordogne PDF Tour Report Naturetrek Wildlife Holidays Archived from the original PDF on 2007 09 29 Retrieved 2011 10 18 External links Edit Media related to Erigeron sumatrensis at Wikimedia Commons Erigeron sumatrensis occurrence data from GBIF Retrieved from https en wikipedia org w index php title Erigeron sumatrensis amp oldid 1009824723, wikipedia, wiki, book, books, library,
