What is "heucherella"

× Heucherella is an evergreen perennial flowering plant in the family Saxifragaceae. A hybrid of garden origin, it is the result of a cross between two distinct genera, Heuchera and Tiarella, and shows similarities to both parents. This type of intergeneric hybrid is quite rare, and is indicated by a multiplication symbol before the name. The name Heucherella is an example of a portmanteau word, a combination of the two parents' names.