Stolons white or tan, 0.3–1 mm diam., glabrous. Flowering stems repent, decumbent, or ascending, branching in distal 1/4–1/2, 4–30 cm, glabrous. Leaves opposite, sometimes alternate distally, membranous. Stolon leaves: petiole 1–4 mm, glabrous; blade ovate to depressed-ovate, round, or flabellate, 2.5–15 × 2–10(–20) mm, base attenuate to cordate, margins subentire or 5–7(–9)-crenate or -crenulate, not purple-spotted, glabrous, surfaces glabrous abaxially and adaxially. Cauline leaves 4–9; petiole absent or 0.1–4 mm, glabrous; blade ovate to depressed-ovate, round, or flabellate, 2.5–15 × 2–10(–20) mm, base attenuate to cordate, margins 5–7(–9)-crenate or -crenulate, glabrous, surfaces glabrous abaxially and adaxially. Inflorescences terminal or axillary solitary flowers or 2–10-flowered, open cymes; bracts green, not purple-spotted, foliaceous, ovate to flabellate, 2–7 × 2–7 mm, margins subentire or 5–7-crenate or -crenulate. Pedicels absent or 0.1–0.8 mm. Flowers: hypanthium green, not purple-spotted, turbinate, 0.9–1.8 × 1.4–2.6 mm, glabrous; sepals spreading to erect, green, greenish yellow, or greenish red, not purple-spotted or purplish brown-spotted distally, broadly triangular or broadly ovate to nearly round, 1.3–1.8 × 0.9–1.6 mm, apex obtuse to rounded; nectary disc conspicuous, green or purple, 8-lobed; stamens 4–8, 0.5–0.9 mm; anthers purple, red, or orange, 0.2–0.3 × 0.4–0.5 mm; styles 0.2–0.6 mm. Seeds 6–16, dark brown, spheroid to ovoid, (0.5–)0.6–0.8 mm, puberulent. 2n = 18, 24.
Phenology: Flowering Mar–Jul.
Habitat: Marshy ground, streamsides, seeps, springs, swampy woods
Elevation: 0-1500 m
N.B., N.S., Ont., P.E.I., Que., Conn., Del., Ga., Ind., Maine, Md., Mass., Mich., Minn., N.H., N.J., N.Y., N.C., Ohio, R.I., S.C., Tenn., Vt., Va., W.Va., Wis.