Boechera platysperma, the pioneer rockcress or broad-seeded rock-cress, is a perennial plant in the family Brassicaceae found in western United States mountains.
It is less than tall.
It can be found on dry, rocky flats and slopes, from , in mountain ranges including the United States Sierra Nevada range, California's North Coast range, Cascade Range, and ranges in the Great Basin.
Leaves are entire.
Flowers are 4-petaled and spoon shaped. Seed pods are flat.