Melanthera angustifolia A.rich. In Sagra

Plants 30–90 cm. Stems weakly erect, strigose. Leaf blades usually linear to narrowly oblanceolate, rarely narrowly ovate-elliptic, 3–8 × 0.5–1.5 cm, bases cuneate, margins irregularly serrate, faces sparsely strigose. Heads borne singly. Peduncles 9–20 cm, glabrescent. Involucres 6–12 mm diam. Phyllaries ovate, 4–5 × 2–3 mm. Paleae 4–5 × 1 mm, apical mucros 0.5–1 mm, straight to slightly recurved. Florets 30–40; corollas 5.5 mm; anther sacs 2 mm. Cypselae 2.5 × 1.5 mm. 2n = 30.