Xanthisma grindelioides var. depressum (Maguire) D.R. Morgan & R.L. Hartman
Family: Asteraceae
rayless tansyaster
[Haplopappus nuttallii var. depressus Maguire,  more...]
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Plants densely cespitose, 3-8(-12) cm. Leaves mostly crowded at base of stems, margins conspicuously white-bristled, bristles (1.5-)2-4 mm. Heads usually 1. Peduncles 1-4 cm, usually ebracteate, occasionally bracteate.

Flowering summer. Calcareous or clayey slopes; 1300-2000 m; Nev., Utah.

Variety depressum was attributed to Arizona by J. T. Kartesz and C. A. Meacham (1999), but I have seen no specimen from there.