Erect, strongly scented annual, up to c. 1 m tall. Stems moderately hairy and glandular, much-branched from base and above. Lower lvs moderately clothed in simple hairs and short glandular hairs, oblanceolate to narrowly elliptic-oblong, apetiolate and cuneate, acute to acuminate, entire or remotely denticulate, 20-80 × 2-10 mm; uppermost lvs smaller, broader based and becoming ± linear and entire. Capitula solitary, 4-10 mm diam. Outer involucral bracts mostly herbaceous, 3-4 mm long; inner bracts mostly membranous, 5-7 mm long. Ray florets c. 8-10; ligules yellow, 1-3 mm long, not exceeding involucre. Disc yellow, often turning red on drying. Achenes hairy, glandular toward apex, obovoid and slightly angled, c. 2 mm long; pappus minutely barbellate.