Canada Goldenrod 

Flowering heads are tiny, and have about 10 small, yellow ray flowers, surrounding a few, central disc flowers. Involucral bracts are narrow, lance-shaped, and only about 3 mm long. The inflorescence is highly branched, with each segment bearing many tiny flowering heads. Leaves occur individually on the stem and attach by a short inconspicuous petiole. Leaves are lance-shaped to elliptical, and have conspicuous teeth. They also have 3 distinct veins that run parallel to the leaf edge. Goldenrod is very common in the fall, and forms conspicuous, sometimes extensive, weed-like, yellow patches in fields, roadsides, and woodland openings. Blooms from August into October. Native to N. A.