Herbs 0.5–1 m tall. Stems brown or reddish brown, cylindric, glabrous, with sparse, small prickles. Leaves simple; stipules linear, 8–10 mm, glabrous, margin entire; blade lanceolate or oblong-lanceolate, 10–22 × 2–5 cm, veins 9–12 pairs, raised abaxially, impressed adaxially, both surfaces glabrous, adaxially with sparse, small prickles along midvein, base rounded, margin sparsely sharply serrate, apex acuminate to caudate. Inflorescences terminal or axillary, 1-flowered. Pedicel 1.5–2.5 cm, glabrous, unarmed. Flowers to 1.5 cm in diam. Calyx abaxially glabrous; sepals erect after anthesis, ovate or lanceolate, 1–1.3 cm × 6–9 mm, apex abruptly pointed, inner sepals with yellowish gray tomentose margin. Petals white, 1.1–1.4 cm × 6–10 mm. Stamens many, shorter than petals; filaments broadened and flattened. Pistils nearly as long as stamens; ovary slightly soft hairy; torus basally with ca. 5 mm stalk; styles glabrous. Aggregate fruit brownish red, subglobose, ca. 2 cm in diam., glabrous; pyrenes 1–2 mm, deeply foveolate. Fl. Jun–Jul, fr. Aug–Sep.
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