Pueblo Mountains wild buckwheat

Leaves: petiole 1-1.5(-2) cm; blade 0.7-1.5 × 0.3-0.8 cm, to-mentose abaxially, floccose and greenish adaxially. Scapes 0.4-0.8(-0.9) dm. Involucres 3-4 mm. Flowers 2.5-3.5(-4) mm. Achenes 2.5-3.5 mm.

Flowering May-Jul. Sandy to gravelly slopes, sagebrush com-munities; 1400-2400; Idaho, Nev., Oreg.

Variety mystrium is known from the Owyhee Mountains (South Mountain) of Owyhee County, Idaho, the Santa Rosa Range (Auto Hill) of Humboldt County, Nevada, and the Oregon Canyon, Pueblo, Steens, and Trout Creek mountains of Harney County, Oregon.