Conyza Canadensis, marestail, plant in flower

Photo by Richard Old | www.xidservices.com

Conyza Canadensis, marestail, leaves

Photo by Richard Old | www.xidservices.com

Conyza Canadensis, marestail, plant leaves in bolting phase

Photo by Richard Old | www.xidservices.com

marestail

Conyza canadensis

Weed Characteristics

Other Names: horseweed, horseweed fleabane, mares tail, Canadian horseweed, Canada horseweed, fleabane

Leaf Type: Broadleaf

Flowers: White

Leaves: Arrowhead leaves with serrated edge; some hair

Life Cycle: Annual/Winter Annual

Leaves are thin with lobed ends and white hairs on the back. The small, white flowerheads appear in mid to late summer. Along with ragweed, this weed's pollen is one of the leading causes of fall allergies. Prefers full sun and tolerates drought. Grows 2 to 5 ft. tall.

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