Leaves: Opposite, simple, ovate to ovate-lanceolate, pointed at the tip, rounded at the base, with 3 main veins, coarsely toothed, smooth, up to 3 inches long.
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Flowers: Many tiny flowers crowded into slender spikes borne from the axils of the leaves, the male flowers usually on separate plants from the female flowers, each flower greenish white, about 1/12 inches long.
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Sepals: 4, united.
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Petals: 0.
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Stamens: 4.
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Pistils: Ovary superior.
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Fruits: Achenes ovoid, narrowly winged, up to 1/10 inch long.