the blooming white azalea rhododendron in spring

azalea background beautiful bloom blooming bush ericaceae flower flowers garden green leaf leaves plant rhododendron season spring white simsii planch deciduous shrub genus family slender branches leathery clustered ends forming oval shape front short tapered edges retrorse fine teeth bottom corolla wide funnel shaped clusters branch rose color bright red flowering typical acidic soil indicator central rhododendrons prefer fertile