Time of bloom: July to October.
Seed-time: August to November.
Range: Connecticut to Ontario, Michigan, and Kansas, southward to Georgia and Louisiana. Habitat: Sandy alluvial soil; damp meadows, thickets along streams.
Stem two to six feet in height with slender branches near the top, densely set with bristly, brownish hairs, very leafy, growing from fibrous clustered roots. Leaflets nine to nineteen, elliptic to narrow lance-shaped, pointed at both ends, sharply toothed, thin, finely hairy, with many interposed pairs of small leaflets of varying sizes; stipules usually broader than their length, clasping, sharply toothed. Racemes many-flowered, one to two feet long, the blossoms hardly more than a quarter-inch broad, the petals light yellow. Burs small, dilated top-shaped, deflexed on their pedicels, the rows of hooked bristles erect, spreading, and reflexed.
If areas are not too large to make the task impracticable, hand-pulling the plants before seed development is well worth while. Repeated and close cutting throughout the growing season, depriving the roots of all leaf-growth, will finally suppress the weed.