Stem repeatedly branched, 2-10 dm. tall, reddish, 4-angled, setose on the nodes and angles to nearly glabrous; petioles slender, 2-8 mm. long, leaf-blades oval or oblong, 1-6 cm. long, 0.5-3 cm. wide, acute, entire, acute or obtuse at the base, 3-nerved, minutely pubescent, especially on the veins, to nearly glabrous; flowers sessile; hypanthium 4 mm. long; sepals 2.5-3 mm. long; petals 5 mm. long; anthers 0.7 or 1.2 mm. long, the basal spurs of the connective 0.5 mm. long; fruiting hypanthium 1 cm. long; seeds 0.4-0.5 mm. long.
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