Tall Lettuce: Wild Opium: Horse-weed. Lactuca canadensis.
Composite Family. June - Sept.
Found in roadsides, borders of fields, thickets, moist soil. Canada to Georgia, west to Arkansas.
Pale-yellow, numerous, small, in loose, spreading cluster terminating stem, 4 - 10 feet high.
Lower leaves deeply toothed, often 1 foot long, narrowed toward the base; upper leaves lance-shaped, toothless.