Sigesbeckia australiensis subsp. australiensis

Erect herb to c. 80 cm high. Leaves lanceolate to elliptic, 3–9 cm long, 0.5–2.5 cm wide, surfaces sparsely pubescent with broad-based hairs and sessile glands, apex acute, base cuneate to attenuate, margins irregularly dentate; petiole to 1 cm long. Capitula 5–12 mm diam.; outer involucral bracts linear to oblanceolate, 4–7 mm long, densely pubescent with minute simple hairs; inner bracts boat-shaped, 2–4 mm long, pubescent with simple and sometimes also stalked glandular hairs; receptacle scales obovate, 2–3 mm long. Ray florets c. 8, ligules 1–2 mm long; disc florets 10–20. Cypselas 2–3 mm long, curved, ridged, black. Flowers mostly spring and summer.