Erigeron bonariensis grows up to 75 cm (29.5 in) in height and its leaves are covered with stiff hairs, including long hairs near the apex of the bracts. Its flower heads have white ray florets and yellow disc florets. It can easily be confused with Erigeron canadensis, which grows taller, and E. sumatrensis.[3]
It flowers in August and continues fruiting until the first frosts. It is instantly recognisable by its blue-green foliage, very narrow, undulate stem-leaves, and purple-tipped involucral bracts. It reproduces only by seed, which are easily blown and spread by wind.[citation needed]
E. bonariensis is a rare alien in southeastern England, found along walls and in cracks in pavements and concrete driveways.[citation needed] It is widespread throughout Australia, where it thrives on roadsides, fallows, pastures, gardens, lawns, footpaths, parks, riparian vegetation, forest and wetland perimeters, waste dumps and disturbed grounds.[8][9]
Photographic Descriptionedit
Dry Summer Formedit
The following are bright dry summer 1st-year forms; in contrast to shady damp winter forms that follow.
General view
Top-heavy greyish gangly look with initial central inflorescence subsequently overtopped by some side ones
Broad heads (may be narrower especially in winter) usually with reddened tips
Head close up
Leaf narrow showing hairs
Leaf surface hairs (similar underside), sometimes poorly hairy
Hairs at leaf tip
Leaf base hairs (a few long ones usually present) and underside hairs
Stem leaves of robust stems multi-lengthed, grey (sometimes green)
Winter, Damp, Shady, Biennial Formsedit
Showing diffusely branched or strangled appearances with small flower heads
Winter form near water in the open
Strangled winter form in the open
Winter form in damp shade
From a biennial form
May have particularly reddened heads
Other photosedit
Erigeron bonariensis growing as a weed on a building in New Delhi, India
erigeron, bonariensis, species, family, asteraceae, found, throughout, tropics, subtropics, pioneer, plant, precise, origin, unknown, most, likely, stems, from, central, america, south, america, become, naturalized, many, other, regions, including, north, amer. Erigeron bonariensis is a species in the family Asteraceae found throughout the tropics and subtropics as a pioneer plant its precise origin is unknown but most likely it stems from Central America or South America It has become naturalized in many other regions including North America Europe and Australia Erigeron bonariensisScientific classificationKingdom PlantaeClade TracheophytesClade AngiospermsClade EudicotsClade AsteridsOrder AsteralesFamily AsteraceaeGenus ErigeronSpecies E bonariensisBinomial nameErigeron bonariensisL Occurrence data from GBIFSynonyms 1 Synonymy Erigeron bonariense L Conyza bonariensis L CronquistLeptilon bonariense L SmallMarsea bonariensis L V M BadilloAster ambiguus DC E H L KrauseConyza ambigua DC Conyza chenopodioides DC Conyza crispa Pourret Rupr Conyza crispa Pourr Cout Conyza gracilis Hoffmanns amp LinkConyza hispida KunthConyza ivifolia Burm f 1768Conyza ivifolia L Less 1831Conyza leucodasys Miq Conyza linearis DC Conyza linifolia Willd Tackh 1956 not L 1753Conyza plebeja Phil Conyza rufescens Hoffmanns amp LinkConyza sinuata ElliottConyza sordescens CabreraConyzella linifolia Willd GreeneDimorphanthes ambigua C PreslDimorphanthes angustifolia Cass Dimorphanthes crispa Rupr Dimorphanthes hispida Kunth Cass Dimorphanthes linifolia Willd Rupr Erigeron ambiguus DC Sch Bip 1845 not Nutt 1818Erigeron canadensis Ten 1831 not L 1753Erigeron contortus Desf ex Pers1Erigeron coranopifolius Willk amp LangeErigeron crispus Pourr Erigeron gusalakensis Rech f amp Edelb Erigeron linearifolius CavErigeron linifolius Willd Erigeron looseri HerterErigeron naudinii Bonnet BonnierErigeron sordidus Gillies ex Hook amp Arn Erigeron transsilvanicus SchurErigeron undulatus MoenchEschenbachia ambigua MorisEupatorium dictyophyllum DC Leptilon linifolium Willd SmallPulicaria gracilis Hoffmanns amp Link NymanPulicaria rufescens Hoffmanns amp Link NymanCommon names of E bonariensis include flax leaf fleabane wavy leaf fleabane Argentine fleabane hairy horseweed asthma weed and hairy fleabane 2 Contents 1 Description 2 Distribution and habitat 3 Photographic Description 3 1 Dry Summer Form 3 2 Winter Damp Shady Biennial Forms 3 3 Other photos 4 ReferencesDescription editErigeron bonariensis grows up to 75 cm 29 5 in in height and its leaves are covered with stiff hairs including long hairs near the apex of the bracts Its flower heads have white ray florets and yellow disc florets It can easily be confused with Erigeron canadensis which grows taller and E sumatrensis 3 It flowers in August and continues fruiting until the first frosts It is instantly recognisable by its blue green foliage very narrow undulate stem leaves and purple tipped involucral bracts It reproduces only by seed which are easily blown and spread by wind citation needed Distribution and habitat editErigeron bonariensis is found throughout the tropics and subtropics as a pioneer plant its precise origin is unknown but most likely it stems from Central America or South America It has become naturalized in many other regions including North America Europe and Australia 4 5 6 7 E bonariensis is a rare alien in southeastern England found along walls and in cracks in pavements and concrete driveways citation needed It is widespread throughout Australia where it thrives on roadsides fallows pastures gardens lawns footpaths parks riparian vegetation forest and wetland perimeters waste dumps and disturbed grounds 8 9 Photographic Description editDry Summer Form edit The following are bright dry summer 1st year forms in contrast to shady damp winter forms that follow nbsp General view nbsp Top heavy greyish gangly look with initial central inflorescence subsequently overtopped by some side ones nbsp Broad heads may be narrower especially in winter usually with reddened tips nbsp Head close up nbsp Leaf narrow showing hairs nbsp Leaf surface hairs similar underside sometimes poorly hairy nbsp Hairs at leaf tip nbsp Leaf base hairs a few long ones usually present and underside hairs nbsp Stem leaves of robust stems multi lengthed grey sometimes green Winter Damp Shady Biennial Forms edit Showing diffusely branched or strangled appearances with small flower heads nbsp Winter form near water in the open nbsp Strangled winter form in the open nbsp Winter form in damp shade nbsp From a biennial form nbsp May have particularly reddened headsOther photos edit nbsp Erigeron bonariensis growing as a weed on a building in New Delhi India nbsp Stiff hairs cover the plant nbsp Basal rosette leaves before plant matures and flowers Maui Hawaii nbsp Foliage becomes grey green in dry summer regions such as Israel nbsp White ray flowers and yellow disc flowers in fully open flower heads Maui Hawaii nbsp Flower heads are followed by seeds which are easily carried by the wind References edit Tropicos Erigeron bonariensis L Conyza bonariensis Germplasm Resources Information Network Agricultural Research Service United States Department of Agriculture Retrieved 18 December 2017 Conyza bonariensis International Environmental Weed Foundation Flora of China Erigeron bonariensis L 1753 香丝草 xiang si cao Comprehensive profile for Conyza bonariensis Archived 2006 11 10 at the Wayback Machine Malta Wild Plants Conyza bonariensis Flowers in Israel Altervista Flora Italiana Cespica di Buenos Aires Erigeron bonariensis L includes photos and European distribution map 1 Tall Fleabane by Agriculture of Victoria 2 Brisbane City Council Weed Identification Tool Retrieved from https en wikipedia org w index php title Erigeron bonariensis amp oldid 1194503144, wikipedia, wiki, book, books, library,
