Which other plant is in the same family as bitterweed?

Bitterweed belongs to the Asteraceae family, which is commonly known as the aster, daisy, or sunflower family. This large family is characterized by its typically composite flower heads and includes a wide variety of plants. The sunflower is a prominent member of this family and shares similar genetic and morphological characteristics with bitterweed.

Other options like dandelion and Canadian thistle also fall under the Asteraceae family. However, barnyard grass is a member of the Poaceae family, which is entirely different, as it includes grasses rather than flowering plants like bitterweed and sunflower. This distinction in family classification helps identify the relationship among these plant species.