Perennials or subshrubs (may flower first year), 20-40+ cm. Cauline leaves mostly crowded over proximal ¹/4-¹/2 of plant heights, internodes mostly 5-25+ mm; lobes mostly linear to filiform, 5-25(-45+) × 0.5(-1) mm. Calyculi of 5 ovate bractlets 1-3 mm. Ray florets 0. Disc corollas yellow, sometimes with red-brown nerves, throats equal to or longer than lobes. Cypselae 2-3 mm; pappi usually 0, rarely 0.1-0.3+ mm. 2n = 40. Flowering (Mar-)Apr-Oct. Openings in desert scrub, limestone ridges; 500-2100 m; Ariz., N.Mex., Tex.; Mexico (Coahuila, Nuevo León, San Luis Potosí, Tamaulipas).