Leaves: petioles 0-20+ mm; blades or lobes mostly 20-150 × 1-1.5(-3) mm. Peduncles 1-3+ mm. Involucres 2-3+ mm. Phyllaries: outer 5-7 ± herbaceous, sericeous to strigillose, inner scarious to membranous, usually villous. Functionally staminate florets: corollas 2.5-3 mm. Paleae 1.8-2+ mm. Cypselae 1.5-2.5 mm. 2n = 36.

Flowering Jun-Sep. Wet or seasonally wet, alkaline soils; 100-2200 m; Ariz., Calif., Colo., Nev., N.Mex., Utah.