Annual or biennial to 0.7 m high. Stems with adpressed arachnoid hairs; wings absent. Cauline leaves linear, pinnatisect to entire, grey-green above and below, with adpressed arachnoid hairs; sessile glands present. Capitula solitary, pedunculate; involucre narrowly ovoid, 4–7 mm diam. at anthesis; median involucral bracts narrowly elliptic, 5–8 mm long, 1.5–2 mm wide, glabrous or with sparse arachnoid hairs; appendages 1.5–2 mm long, dark brown to black, with 5–7 pairs of stiff marginal cilia. Florets purple; inner (fertile) florets with tube 8–9 mm long, glandular, and lobes 3–4 mm long; sterile florets longer than fertile florets. Anthers 4–5.5 mm long. Achenes cylindrical, 2.7–3 mm long, sparsely tomentose, dark brown. Longest pappus bristles 1–1.5 mm long, white.
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