Wax begonias (Begonia semperflorens) have waxy leaves and lots of flowers. Leaves can be green, bronze or red. Flowers are single or double in shades of red, pink, orange and white. 
Angel wing begonias have long, cane-like stems and leaves are shaped like the wings of an angel. Both standard and dwarf forms exist and many are variegated. Flowers usually grow in large clusters.