Parry’s sandpaper plant Parry’s sandpaper plant

Shrubs, bushy to moundlike, to 15 dm; branches of current season to 13 cm. Leaves: petiole 0.5–3.5 mm; blade ovate to elliptic, without marked size dimorphism, to 40 × 30 mm, base acute to rounded, margins usually crenate to serrate, sometimes small leaves entire, apex acute. Inflorescences 35–65-flowered. Flowers strongly bilaterally symmetric; petals spatulate, 10–15 mm, claws postgenitally distally coherent, forming slitted corolla tube; stamens exserted laterally through slits between petal claws. 2n = 46.

Flowering Apr–Jul. Wash bottoms, desert plains, usually white to gray, clayey soils; of conservation concern; 400–1300 m; Ariz., Nev., Utah.