Boechera platyspermaBoechera 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 rangeIt 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 stemsLeaves are entire.Inflorescence and fruitFlowers are 4-petaled and spoon shaped. Seed pods are flat.