Perennial herbs. Stems several, sturdy, up to 1.5 m, branched above, several-headed, ridged, greenish, sulcate-striate, below covered with lanate indumentums and stipitate-glandular hairs, above arachnoid and with stipitate-glandular hairs. Leaves oblanceolate to oblong-lanceolate outline, subentire to pinnatisect with triangular segments, margins revolute spines sturdy, up to 1 cm; green with glandular-setose above, white lanate below with stipitate glands on veins. Basal leaves petiolate up to 6 cm, lamina 22–34 x 5–10 cm, cauline amplexicaul and simple. Heads 5–8 cm diameter, borne at ends of stems and branches, greenish to bluish. Capitula up to 30 mm long, brush equal to longer than outer phyllaries, 6–12 mm long; phyllaries 17–21, other 6–10 mm, glandular spathulate-deltoid, margins serrate, median 14–20 mm, without long spines, lanceolate, margins serrate, innermost connate to about 1/2 their length. Corollas pale blue or whitish; tube 8–10 mm long, glandular, lobes 7–8 mm; anther bases tailed and fimbriate. Achenes 10–11 mm long, densely covered with yellow twin-hairs; pappus bristles 1.5–2 mm long, connate at basal half. Flowers and fruits between July and October.