Red azalea is a shrub native to East and Southeast Asia and cultivated in the U.S. It is an important parent of the azaleas grown in pots for sale.
On a simple flower, Satsuki azalea has five , while red azalea usually has ten. Double-flowered cultivars and hybrids may be impossible to identify from a flower photo alone.
Why they get mixed upOlder horticultural names often grouped the two species together.