borealforest.org

 
BACK

Herbs and Other Plant Species of the World's Boreal Forests

World Boreal Trees

GLOSSARIES
Terminology | Pictorial

   
Conyza canadensis
Canadian Fleabane
"Horseweed"

Asteraceae (Aster Family)

A coarse weed with an erect stem with branching clusters, growing to a height of 30 - 210 cm.

Description

Horseweed Distinguishing Features - Leaves: numerous, alternate, ascending, mostly linear to linear-oblanceolate or lower ones elliptic-oblong to oblanceolate and often coarsely toothed, the latter often early deciduous, 2 - 10 cm long, 2 - 10 mm wide, acute, tapered to a sessile or short-petiolate base, usually hispid on the margins and at least on the midrib beneath. Flowers: a terminal, elongate cluster with ascending racemiform branches; heads usually numerous, inconspicuously radiate; white or pinky-purplish-tinged; disk corollas yellowish to light pinkish. Fruit: single-seeded, with numerous bristles.

Habitat

Native of North America, widespread throughout Canada and the United States; spread to Europe; on disturbed ground; often invades shorelines.

Notes

North American Indians and early settlers used a preparation of Horseweed leaves to treat dysentery and sore throat.



Return to Top of Page



Home | Forest Capital of Canada | About Our Website |
Ontario's North (West) Forest | Boreal Forests of the World | North (West) Forest Industry |
World Links and Resources | "Forest Finder" Search Engine | Educational Resources |
What's Happening | Contacts | Site Map |