Plants 40–100 cm; caudices woody. Stems glabrous, viscid-resinous. Leaves: basal petiolate; blades tapering to petioles, linear to elliptic-oblanceolate, 100–150 (–220) (including petiole) × 5–10(–15) mm, margins serrate, apices acute to obtuse; the outer much smaller; mid and distal similar to basal, becoming sessile, mid 40–60 × 2–4 mm, distally reduced (in arrays) to linear bracts 10–35 × 1–2 mm, entire. Heads in paniculiform arrays, 15–30 cm, branches ascending, 2–10 cm, not secund in erect stems, secund in arching ones. Peduncles 2–6 mm, glabrous, sometimes resinous-glandular; bracteoles linear, 0–5. Involucres campanulate, 4.5–6 mm. Phyllaries (in 3–4 series) lanceolate to linear-lanceolate, strongly unequal, apices rounded, glabrous, somewhat resinous. Ray florets 3–6; laminae 3.5–5 × 1 mm. Disc florets mostly 8–10; corollas 4.5–5.5 mm, lobes 0.8–1.2 mm. Cypselae obconic, ca. 2.5 mm, shallowly ribbed, glabrous; pappi 4–5 mm. 2n = 18.
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