Also known as Esperanza, Yellow Trumpetbush or Trumpetflower, and Yellow Elder, this perennial, deciduous shrub usually reaches 3 to 6 feet in height. It grows lance-shaped, olive green leaves and clusters of showy, trumpet-shaped, yellow flowers that are especially attractive to butterflies and hummingbirds. This shrub grows in full sun and partial shade, and in dry, well-drained soils, including rocky, sandy, limestone, and loam soils.