Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.


A weedy North American annual plant (Conyza canadensis) in the composite family, having a tall erect stem, narrow leaves, and numerous small whitish flower heads grouped in panicles. Also called mare's tail.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Plants) the US name for Canadian fleabane. See fleabane3
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014



a North American composite weed, Erigeron canadensis, having narrow hairy leaves and clusters of very small greenish flowers.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.


An annual common throughout North America. It grows as high as six feet and during the Depression years of the 1930s was sometimes pulled up and fed to livestock.
1001 Words and Phrases You Never Knew You Didn’t Know by W.R. Runyan Copyright © 2011 by W.R. Runyan
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.Horseweed - erect perennial strong-scented with serrate pointed leaves and a loose panicle of yellowish flowershorseweed - erect perennial strong-scented with serrate pointed leaves and a loose panicle of yellowish flowers; the eastern United States
herb, herbaceous plant - a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests
Collinsonia, genus Collinsonia - small genus of perennial erect or spreading aromatic herbs; United States
2.Horseweed - common North American weed with linear leaves and small discoid heads of yellowish flowershorseweed - common North American weed with linear leaves and small discoid heads of yellowish flowers; widely naturalized throughout temperate regions; sometimes placed in genus Erigeron
Conyza, genus Conyza - common American weed or wildflower
weed - any plant that crowds out cultivated plants
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
Researchers conducted field experiments in Pennsylvania to explore how cover cropping tactics influenced the management of horseweed in no-till grain crops.
Pale comandra pallida Convolvulus arvensis Field bindweed Conyza canadensis Horseweed Croton monanthogynus Oneseed croton Dalea candida White prairieclover y Dalea purpurea Purple prairieclover y Desmanthus illinoensis Illinois bundleflower Erigeron strigosus Daisy fleabane y Euphorbia dentata Toothed spurge y Euthamia graminifolia Grassleaf goldenrod Eragaria virginiana Wild strawberry Helianthus mollis Ashy sunflower y Hieracium longipilum Eongbeard hawkweed Hypericum perforatum Common St.
Competitive ability of soybean cultivars with horseweed (Conyza bonariensis).
The horseweed (Conyza spp.) is well recognized globally as an herbicide-resistant weed and which can, according to TREZZI et al., (2014), cause up to 36% of yield loss in soybean.
Conyza canadensis (L.) Kali Boti/Canadian Horseweed; Asteraceae: Aphis crassivora, Aphis fabae; Aphis gossypii, Aulocorthum solani and Myzus persicae.
Erigeron canadensis L.), known as "Canadian fleabane" or "horseweed", is native throughout of North America and is also widespread in Europe.
zure kers 'sour cherry', Canadese fijnstraal 'Canadian horseweed', and nominal (42%), e.g.
This study aimed to use geostatistical techniques to map the weed species common sow thistle (Sonchus oleraceus), horseweed (Conyza spp) and 'maria-mole' (Senecio brasiliensis), in order to study their spatial dependence in an area under no-tillage system during two agricultural seasons.
Dominant plants at this location were Epilobium ciliatum (willow-herb), Erigeron [Conyza] canadensis (horseweed), and Juncus spp.
The problem weed species, horseweed (Conyza bonariensis), of lesser frequency, was controlled 100%.