Time of bloom: June to August.
Seed-time: August to November.
Range: Throughout the United States and southern British America.
A large, very robust plant, in many localities, the most common of the docks. Stem stout, erect, grooved, simple or with a few branches, somewhat rough, especially near the top. Lower leaves often more than a foot in length and half as broad, oblong, with heart-shaped bases and rounded or bluntly pointed tips, the veins somewhat hairy on the under side; petioles long and thick; stem leaves narrower and more pointed, all petioled. Panicle large and loose, the whorls somewhat distant, often subtended by leafy bracts; pedicels slender, jointed below the middle, longer than the calyx-lobes; the valves, which enclose the fruit, pointed-ovate, or nearly halberd-shaped, strongly net-veined, sharply toothed at the side, and only one of them bearing a tubercle on the back. Achene dark red, smooth and shining, its three faces concave and its angles faintly margined.
Means of control the same as for Rumex crispus. (Fig. 54.)