Canada goldenrod. Native. Member of the Asteraceae family. Canada goldenrod reaches a height of 2-6 feet and grows in a variety of habitats such as open fields across nearly the entire United States. Its leaves are 4-6 inches in length, lanceolate in shape, and typically serrated along the edges. Flowers are small and yellow, growing in dense clusters on the upper stems. Several of these flowering stems top each plant, and the flowers have a slight fragrance. Canada goldenrod blooms from July-October.