Swaziland's Alien Plants Database

Conyza canadensis (L.) Cronquist
horseweed fleabane, Canadian horseweed, Canada fleabane, butterweed, blood stanch, colt's tail, fireweed, hogweed, horseweed, mare's tail, pride weed
Disturbed areas, Minor problem species
Origin: North America
Growth Form: Herb
Plant Description: Sub-woody, almost unbranched annuals up to 2 m high. Leaf margins finely dentate. Flower heads minutely radiate, rays mauve or white.
Key Features:
Control: pre-emergence herbicides, post-emergence herbicides must be completed before plant rosette
More information:
NRCS Plants Database

Photo - flowers

Brother Alfred Brousseau @ USDA-NRCS PLANTS Database

Photo - flowers

Larry Allain @ USDA-NRCS PLANTS Database

Photo - plant

Robert H. Mohlenbrock @ USDA-NRCS PLANTS Database / USDA SCS. 1989. Midwest wetland flora: Field office illustrated guide to plant species. Midwest National Technical Center, Lincoln, NE.

Photo - flowers

K Braun, Swaziland's Alien Plants Database

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