Epilobium curtisiae

Matted perennial herb with vigorous leafy stolons, often with stems ascending to 15 cm high, lower branches rooting in mud; stems with dense or sparse curved hairs. Leaves opposite on lower stems, alternate near inflorescences, narrow-elliptic to elliptic, 0.5–2.5 cm long, 2–9 mm wide, glabrous but for a few marginal hairs, apex rounded, base tapering, margins with sparse, shallow teeth, often undulate; petiole to 1 mm long. Flowers with or without a few long hairs inside the hypanthium; sepals lanceolate, 2–4 mm long; petals pale purplish-pink, 3.5–7 mm long. Capsule 1–2.5 cm long, with a sparse, close pubescence; pedicel to 3 mm long; seeds 1.3–1.4 mm long, coma absent, pale cellular rim present on adaxial side. Flowers mainly Dec.–Feb.