Herbs or subshrubs, perennial, erect, 1-2.5 m tall. Stems striate, green, woody at base, hollow in center, 1-25 cm in diam., glabrate or puberulent particularly on younger parts and in synflorescence, usually unbranched except for synflorescence. Leaves herbaceous, dark green adaxially, narrowly oblong to oblanceolate, 20-30 × 4-8 cm, abaxially glabrate or puberulent with sparse multicellular hairs, adaxially often rugose and glabrous, base attenuate into auriculate petiole, margin minutely serrate-dentate, apex acuminate; veins 14-16 pairs. Capitula numerous, 7.5-8.5 × 2.5-3.5 mm, terminal, in a pyramidal panicle. Involucre campanulate-globose; phyllaries in 2 or 3 series, outer ones shorter, ovate-lanceolate to linear, 6.5-7.5 × ca. 0.5 mm, with prominent scarious margins, margins and apices ciliate. Receptacle flat, 1.5-2.5 mm in diam., alveolate, fimbriate or densely pilose. Marginal florets 6-7 mm, 2-or 3-lobed, glabrous. Central florets yellowish, 6.5-7.5 mm, with 5 broadly triangular lobes, lobes with sessile glands and remote multicellular hairs. Anthers sagittate, tailed. Achenes oblong, ca. 1 × 0.3-0.4 mm, 10-ribbed, pubescent. Pappus pale reddish, ca. 5 mm. Fl. Jan-Apr. 2n = 18.
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A tall herb. It takes 2 years to complete its life cycle. It can keep growing from year to year. It can be 3 m or more tall. The stems are woody at the base and have lines along them. The leaves are narrowly oblong and 20-30 cm long by 4-8 cm wide.
A tropical plant. It grows in the central mountains in Malaysia. In southern China it grows in forests, on grassy slopes and along rivers between 400-1,500 m above sea level. In Yunnan.
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Humid shaded places, along stream banks, at elevations up to 1,500 metres. Forests, grassy slopes, riversides; at elevations from 400-1,500 metres in southern China.1
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