——Polygonum amphibium.
Found in swamps in September and October.
The single stem, 3 or 4 inches high, bears a few leaves, and is large, round, hollow, and juicy; a dull-reddish-green color, that is dark near the foot.
The leaf (varying from 2 to 5 inches in length) is oblong with a pointed tip and wedge- or heart-shaped base, an entire margin, and prominent midrib; it has a thin, leathery texture, and a very smooth shining surface; in color it is dark green, much toned with dull red, the midrib lighter. The leaves, on short stout stems, clasp the stalk with a dry, red-brown sheath enfolding the joint; they are placed alternately.
The flowers are 5-parted, the tips of the divisions seldom spreading, of a bright rose-pink, coarse hue. They are gathered in a close club, set on a short, terminal, green stem.
The lower of the three or four leaves float upon the surface of the water or lie on the mud of this plant’s miry home.