Narrow-leaf sandpaper plant Narrow-leaf sandpaper plant

Subshrubs, bushy, to 16 dm; branches of current season 10–38 cm. Leaves: petiole 0–1 mm; blade usually elliptic, sometimes falcate, without marked size dimorphism, to 42 × 5 mm, base acute, margins entire, apex rounded to acute. Inflorescences 60-flowered. Flowers ± radially symmetric; petals spatulate, 5 mm, claws distinct; stamens exserted distally (not laterally between petal claws). 2n = 46.

Flowering Mar–Jun. Sandy and gravelly canyon and arroyo bottoms, creosote bush scrub; 20–1000 m; Ariz., Calif.; Mexico (Baja California, Sonora).

Petalonyx linearis is found in the Sonoran Desert.