2n = 60

Erect annual or short-lived perennial herb. Mid cauline lvs glabrous, or sparsely clothed in short hairs especially on lower surface, apetiolate, narrow-elliptic to narrow-lanceolate, evenly, finely dentate, with dentate, amplexicaul basal lobes, 40-160-(200) × 5-25-(40) mm. Uppermost lvs smaller and sometimes linear. Supplementary bracts 3-5, 1-2 mm long. Involucral bracts (7)-8-(10), glabrous, 4.5-6.5 mm long. Ray florets 0. Disc yellow, 1-2 mm diam. Achenes subcylindric, only slightly narrowed to and slightly constricted below apex, with 1-2-(3) rows of hairs on ribs, 1.8-2 mm long.