Hairy galinsoga (Galinsoga quadriradiata) is a broadleaf weed that is native to Central Mexico but has been naturalized in many parts of the world, including the United States. Like many weeds, it produces a beautiful flower, but hairy galinsoga is considered an invasive plant in many countries. If left to its own devices it can spread fairly quickly over large areas. It grows well around ditch banks, in open fields and lawn areas.This plant has an erect stem that grows up to 2 feet tall. Leaves of the plant have stems of their own and stick out from the main stem. The leaves are green in color and are egg-shaped and large when the plant is early in development. During growth, the leaves appear smaller and are covered in tiny hairs. When flowers appear, they have small white petals and a round center that is yellow in color. Some flowers may become dull yellow in the center once exposed to sunlight.