Hoya 'String Bean'Botanical Name: Hoya shepherdii Common Name(s): String bean hoya Description: The String Bean Hoya produces 2 3" wide clusters composed of sweetly fragrant 1 2" wide white waxy star shaped flowers with a small maroon eye. The long narrow deep green glossy foliage adorns the long trailing stems and give the plant its common due to their resemblance to string beans.