Representative Images

11 Images Send these Selected Images to Your Light Box

1120054 horseweed Conyza canadensis Plant(s) James H. Miller & Ted Bodner	1120053 horseweed Conyza canadensis Plant(s) James H. Miller & Ted Bodner	5374402 horseweed Conyza canadensis Foliage Joseph M. DiTomaso	1358423 horseweed Conyza canadensis Foliage Mary Ellen (Mel) Harte
5437414 horseweed Conyza canadensis Foliage Bruce Ackley	1116025 horseweed Conyza canadensis Flower(s) Charles T. Bryson	1358419 horseweed Conyza canadensis Flower(s) Mary Ellen (Mel) Harte	1358421 horseweed Conyza canadensis Flower(s) Mary Ellen (Mel) Harte
5437420 horseweed Conyza canadensis Seed(s) Bruce Ackley	1557223 horseweed Conyza canadensis Seedling(s) Ohio State Weed Lab Archive	1116024 horseweed Conyza canadensis Plant(s) Charles T. Bryson

Maps

EDDMapS Distribution - This map is incomplete and is based only on current site and county level reports made by experts, herbaria, and literature. For more information, visit www.eddmaps.org

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State Regulated List - This map identifies those states that list this species on their regulated list. For more information, visit Invasive.org

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Most Troublesome / Most Common Agricultural Weed List
This map identifies those states that consider this species either most troublesome or most common in at least one commodity. For more information, visit the MTMC project page.

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Legend
	No Data for this state
	Troublesome or Common weed in one or more crops

Invasive Listing Sources

Taxonomic Rank

Kingdom: Plantae

Phylum: Magnoliophyta

Class: Magnoliopsida

Subclass: Asteridae

Order: Asterales

Family: Asteraceae

Genus: Conyza

Synonyms and Other Names

Other Common Names:
Canadian horseweed, Canada horseweed, horseweed, horseweed fleabane, mare's tail, marestail

References

Common Name Reference:	Weed Science Society of America Common Names List
Scientific Name Reference:	USDA, NRCS. 2010. The PLANTS Database. National Plant Data Center, Baton Rouge, LA, USA.