Perennial, aromatic, densely appressed silky-canescent, upright, up to 1.25 (-1.5) m tall herb with vertical rootstock. Stem terete, mildly striate, minutely punctate glandular, thinly cinereous or glabrate, ± densely foliated and profusely branched in upper part. Basal and lower stem leaves long petioled, petiole up to 10 cm long, lamina broadly ovate, 8-15 x 4-8 cm, 2-3-pinnatisect into linear-oblong to oblanceolate, 4-10 x 2-4 mm, obtuse lobes; upper and middle stem leaves short petioled or subsessile with fewer, mostly lanceolate, ± acute lobes; uppermost in floral region sessile, 3-fid or entire. Capitula heterogamous, short peduncled, depressed globose, 2.5-3.5 x 3-5 mm, nodding in narrow to broad pyramidate panicle with straight ascending or ± oblique spreading, up to 30 cm long primary and up to 12 cm long secondary branches. Involucre 3-4-seriate, outermost phyllaries linear, c. 3 mm long, green, appressed canescent; inner ovate to broadly ovate-orbicular, 1.5-2.5 x 1.25-2 mm, mostly scarious. Receptacle ± flat, densely white hairy. Florets numerous, yellow; marginal florets female, 20-25, fertile, with c. 1.25 mm long, obliquely 2-toothed corolla and flat exserted patent style branches; disc-florets many, bisexual, fertile, with campanulate, 1.5-2 mm long, 5-toothed, glabrous corolla. Cypselas ± oblong-cylindric, 0.8-1 mm long, narrowed to the base, smooth, with oblique corolla attachment.