Conyza canadensis
(Horse Weed)

Other pictures of this plant:

               Seedpod                                           Leaf                                            Stem                                        Seed                                          Habit

Facts About this Plant:

    Common Names: Horse Weed, Canada Horseweed, Canadian fleabane, Coltstail, Marestail, Butterweed
    Synonyms: Erigeron canadensis
      Lifespan: Annual
      Zones: N/A
      Type: Forb
      Bloom Time: June - September
      Status: Native

    Conyza canadensis, or Horse Weed, is native to the entire continental United States. It is an annual which grows in spring and blooms starting in mid summer and continues until early fall. It is considered native by almost all authorities, though a couple consider it non-native.

    The plant at early stages looks very similar to Solidago (Goldenrod) species, but as it grows up and begins to take on its own shape. It has a tall habit, and typically has hairy stems and leaves. It is most easily distinguished in bloom, as it has small white flowers, which easily distinguish it from the yellow flowers of Solidago species.

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