2n = 60

n = 30

Erect annual or short-lived perennial herb. Mid cauline lvs sparsely white- lanate on upper surface, usually densely white-lanate on lower, very rarely becoming only sparsely hairy, apetiolate, elliptic to narrow-oblong, pinnately lobed with oblong to obovate, entire or few-toothed segments, amplexicaul and dentate at base, 5-17 × 1.5-4 cm. Uppermost lvs smaller, often lanceolate, usually dentate and not lobed, rarely entire. Supplementary bracts 8-14, 1-2.5 mm long. Involucral bracts 13-(14), usually lanate toward base, (4)-4.5-6 mm long. Ray florets 0. Disc yellow, 2-3 mm diam. Achenes ellipsoid-subcylindric, slightly constricted below apex, usually with 1-3 rows of hairs between ribs, sometimes evenly hairy, 1.2-1.6 mm long.