Annual herbs, 15-35 cm tall; stems erect, 1.5-3.5 mm diam., hirtellous to pilose with hairs to 0.7 mm long. Leaves lyrate, the margin sinuate especially on the blade, 2-4.5 cm long, 1.2-2.7 cm wide, the apex obtuse, the base attenuate, the upper surface sparingly pilose, the lower surface resin-dotted and sometimes more densely pilose; petiole tapering, winged, 1-2.2 cm long. Inflorescence with heads subsessile or with peduncles up to 1 mm long. Heads radiate, 3-5 mm tall, 6-10 mm across; outer involucre spreading, 6-7 mm diam., the bracts usually 5, separate, lanceolate to narrowly ovate, 3-4 mm long, 1.5-2 mm wide, apically acute, the abaxial surface resin-dotted and sparingly pilose with hairs 0.5 mm long, the margin herbaceous and ciliate; paleas elliptic, 1 mm long, 0.2 mm wide, apically erose; ray florets 5-7, the ligules light yellow, elliptic, 1 mm long, 0.4 mm wide, apically emarginate; disc florets 3-5, the corollas yellow-orange, 0.7 mm diam., the throat and tube each 0.7 mm long, the ovaries sterile, 0.8 mm long, 0.1 mm diam. Fruits 2.5-4 mm long, the sides resin-dotted, the apex with hooked short spines and 2 straight divergent spines to 4 mm long. Chromosome number unknown.
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