The name Heucherella is an example of a portmanteau word , a combination of the two parents ' names .
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 .
This type of intergeneric hybrid is quite rare , and is indicated by a multiplication symbol before the name .