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Phyllaries many, appressed-imbricate, somewhat scarious, purple, glandular and ± puberulent towards the apex, otherwise glabrous, margins narrowly subhyaline, the outer from c. 1 mm. long, the inner to c. 3 mm. long, ovate to oblong-lanceolate.
Stem leafy, branching throughout, sparsely pilose; branches to c. 28 cm. long, ascending, leafy; indumentum of scattered erect soft flagelliform hairs intermixed with smaller appressed 1-2-armed T-shaped hairs on young growth and branch-ends.
Achenes c. 1 mm. long, shortly obovoid-oblong, rounded-truncate above, with 4–6 broad low ribs separated by narrow grooves, densely beset (except the apical part) with minute, tuberculate trichomes; pappus absent.
Corollas purple in the upper part, c. 3 mm. long, funnel-shaped with a short tubular lower portion, lobes short, sparsely glandular outside.
Capitula numerous, corymbiformly cymose, in clusters of 6–12, clusters terminal on branches; capitula stalks 1–10 mm. long.
Involucres 3–4 x 4–5 mm., spreading to c. 10 mm. wide, subglobose-cupuliform.
An erect bushy annual herb to c. 60 cm. tall.
Receptacle dentate-alveolate.
