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. Habitat and range 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 and stems Leaves are entire. Inflorescence and fruit Flowers are 4-petaled and spoon shaped. Seed pods are flat. References platysperma