Boechera platysperma, the pioneer rockcress or broad-seeded rock-cress, is a perennial plant in the family Brassicaceae found in western United States mountains.

[1] It is less than 12 inches (30 cm) tall.

[1] It can be found on dry, rocky flats and slopes, from 4,000 to 12,000 feet (1,200 to 3,700 m), in mountain ranges including the United States Sierra Nevada range, California's North Coast range, Cascade Range, and ranges in the Great Basin.

[1] Flowers are 4-petaled and spoon shaped.

Seed pods are flat.