Herbs, 30–140 cm; indumentum of nonglandular hairs. Stems erect, glabrescent or sparsely hairy, hairs fine, usually appressed; older stems 6–13 mm diam. Leaves: petiole 0.3–1.5 cm; blade linear, linear-lanceolate, lanceolate, narrowly ovate, or elliptic, 5–15 × 0.4–3 cm (L/W = (2–)4–24), base narrowly acute, apex narrowly acute, acute, or obtuse, surfaces glabrescent or sparsely appressed-hairy. Inflorescences 1.5–7 cm, peduncle 0.5–3 cm, fertile portion 0.7–5 cm, with 1–2 pistillate flowers. Staminate flowers: petals narrowly obovate, 2–2.3 mm, often unequal, exerted well beyond calyx. Pistillate flowers: sepals ovate or elliptic, longest 2–2.4 mm, becoming 3–4.5 mm in fruit; petals 1.9–2.9 mm; ovary densely covered in bulbous-based, nonglandular trichomes. Capsules 5–6 mm wide, trichomes conic proximally, hairlike distally, nonglandular. Seeds pale brown, 3 mm diam.
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