Herbs 10-20 cm tall. Petiole usually purple at base, unwinged; leaf blade dull green to mid-green, narrowly oblanceolate, 7-10 × 1.5-2.8 cm, arachnoid, margin deeply dissected; lateral lobes 6-9 pairs, linear to linear-lingulate, 8-14 × 1-2(-2.5) mm, ± patent, sometimes slightly bent upward or downward, margin ± entire; interlobes 6-10 × 1-2 mm, margin with a few linear patent acute lobules or teeth; terminal lobe 3-partite, apical segment linear to linear-lingulate, 10-15 × 1.5(-3) mm, and apex acute; late summer leaves with broader lobes. Scapes greenish brown, ± equaling leaves, arachnoid but later sparsely so. Capitulum 2-3 cm wide. Involucre 1-1.2 cm wide, base ± rounded. Outer phyllaries 13-17, deep green to ± dark green, usually slightly glaucous and often suffused reddish in upper part, subimbricate, ± lanceolate, outermost ones 7-9(-10) × (2.2-)2.6-3.1 mm and ca. 3/5 as long as inner ones, loosely appressed to ± erect, some slightly recurved at apex, with whitish membranous ca. 0.3 mm border, margin ± glabrous, apex with distinct horn or corniculate; inner phyllaries 1.2-1.5 cm, narrow, apex distinctly corniculate. Ligules deep yellow; outer ligules flat, outside striped grayish greenish pink; inner ligules with reddish apical teeth. Stigmas grayish green, densely dark pubescent. Anthers polliniferous; pollen grains irregular in size. Achene grayish straw-colored brown, 3.9-4.3 × 0.8-0.9 mm; body apically ± densely shortly spinulose, subgradually to subabruptly narrowing into a thin cylindric 0.9-1.2 mm cone, spinules thin; beak 7-9 mm, thin. Pappus yellowish white, 6.5-7 mm. Fl. spring and summer. Agamosperm. 2n = 24.
Home