265 • Foundation plants, which are typically shrubs, can be used to create a contrast of colors and textures between a building’s foundation and plant materials. • Corner plants soften hard architectural lines and narrow the distance from the soil surface to those lines. • A topiary is a shrub that has been pruned and sheared into an interesting shape or imaginative character. • Espalier is a unique plant training method in which the plant is trained to grow fl at against a wall or other support. • Massing is the practice of planting many of the same type of plant very close together to create sweeps of colors that create dramatic effect.