Senecio hispidissimus

Erect annual to 1.5 m high; stems densely coarse-hairy, density reducing upwards. Leaves sessile, auriculate, coarse dentate to lobate or occasionally not dissected, with remotely and sparsely denticulate margins, both surfaces moderately to densely coarse-hairy; mid-stem leaves narrow-elliptic or linear in outline, 6–13 cm long, 1–3.5 cm wide; upper leaves narrow-oblong to narrow-lanceolate. Inflorescence corymbose, typically with 10–100 capitula; capitula non-radiate; involucre cylindric to narrowly cylindric, (5.0–)6.0–9.0 mm long, glabrous; bracts mostly 11–14; bracteoles present; florets 20–45, bisexual and female. Cypselas cylindric to narrow-ellipsoid, 1.5–2.8 mm long, tan or brown, papillose-hairy in dense lines; pappus of slender hairs, 6–7 mm long, deciduous. Flowers spring–summer.