Description

Perennial herb to 1(-2.5) m. Stems reddish-brown and markedly glandular-pubescent, especially above. Leaves opposite: petiole up to 4 cm; lamina up to 10 × 6 cm, ovate or rhombic, dark green above, paler beneath; base cuneate; apex acute to acuminate; margin crenate. Capitula c. 5 × 5 mm, crowded in corymbs. Phyllaries 2-seriate, lanceolate, glandular-pubescent. Flowers white, often appearing in the winter. Achenes c. 2 mm, ± cylindric, smoothly 5-angled. Pappus of numerous scabrid bristles.