Herbs, perennial, 30-70 cm tall, with procumbent slender rhizomes; stems erect, unbranched or few branched in upper part, usually with short sterile branches at leaf axils above middle, white villous, especially in lower part. Basal leaves petiolate; leaf blade linear-lanceolate, rarely linear-oblong, 8-20 × 1-2 cm, (2 or)3-pinnatisect, both surfaces villous; primary segments many, 1-1.5 mm apart; ultimate segments filiform-linear or linear-lanceolate to lanceolate, 0.5-1.5 × 0.1-0.2 mm, apex cartilaginous-mucronulate; middle and upper stem leaves similar, sessile, gradually smaller. Synflorescence a terminal flat-topped panicle, 2.5-7 cm in diam. Capitula many. Involucres narrowly oblong or ovoid-oblong, 4-4.5 × 2-2.5 mm; phyllaries in 3 rows, yellowish green, midvein greenish, convex, abaxially brownish pilose, oblong-ovate to oblong, 2-4 × 0.8-1.2 mm, scarious margin sometimes with narrow pale brown edge, apex somewhat acute or obtuse. Paleae oblong-lanceolate to lanceolate, glabrous or appressed pilose on upper part. Ray florets 5; lamina yellowish white, semiorbicular or suborbicular, 1.2-1.3 × 1.3-1.8 mm, apex subtruncate or 3-dentate. Disk florets yellow, tubular, 5-lobed. Achenes oblong-cuneate, 1.8-2 × ca. 0.8 mm, with narrow lateral ribs. Corona absent. Fl. and fr. Jul-Aug. 2n = 18, 36.
Erect to ascending erect, up to 80 cm tall, usually unbranched, white villose-stemmed herb. Leaves linear to linear-lanceolate, 3 – 8 (-10) cm long, up to 2 cm wide, (2-) 3-pinnatisect into filiform-linear or linear-lanceolate, 0.5–1.5 x 0.1–0.3 mm, cartilaginous mucronulate, setaceous, often congested ultimate segments, basal and lower leaves on up to 5 cm long petioles, middle and upper stem leaves sessile and gradually smaller, rachis 0.4 – 0.6 mm wide. Capitula oblong, 40–150 or more, 2.5–3 mm across, on up to c. 3 mm long peduncles, in dense, up to 8 cm broad compound corymbs. Involucre oblong to oblong-cylindric, 3.5–4.5 x 2–3 mm, shortly attenuate and sparse to dense pilose below, phyllaries 3-seriate, oblong-ovate to oblong-lanceolate, outer pale, brownish at the acute tips, inner apically obtuse and scarious. Paleae oblong-lanceolate to lanceolate, whitish-membranous, glabrous to hairy towards the acute apices. Ray-florets 4-5, with inconspicuously 3-lobed, ± orbiculate, 1–1.2 x 1–2 mm, white ligules. Disc-florets 10–20, with yellow, 5-lobed corolla tube. Cypselas oblong-cuneate, 1.8 – 2 mm long, laterally ribbed, light brown.
15–50 cm hoch. Grundständige Blätter 0,3–1 cm breit. An den obersten 12 cm des Stängels unter dem Blütenstand 8–12 Blätter. Mittelrippe der Stängelblätter 0,6–1 mm breit, ungeflügelt und nicht gezähnt, Blattabschnitte aufgestellt (nicht flach ausge