Ontario Weeds: Canada fleabane
Excerpt from Publication 505, Ontario Weeds, Order this publication
Table of Contents
Horseweed, mare's-tail and, vergerette du Canada
Canada Fleabane is a winter or summer annual weed, reproducing only by seed.
Figure 1: Mature, fluffy flowers of Canada
Figure 2: Canada fleabane, hairy seedling
Figure 3: Canada fleabane, seedling
Figure 4: Canada fleabane showing rosette
Figure 5: Young Canada fleabane leaf
Figure 6: Old, mature leaf of Canada fleabane
Figure 7: Whole mature plant of Canada fleabane
Figure 8: Flowers of the Canada fleabane weed
Canada fleabane occurs throughout Ontario in grain fields, pastures, waste places, roadsides, and gardens.
Canada fleabane is easily distinguished by many narrow, bright green leaves and many small, yellow-green flower heads. The ray florets are inconspicuous and when mature the flowers look light and fluffy. When parts of the weed are crushed they have a faint odour that is similar to the scent of carrots.
There are populations in Ontario that are resistant to:
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