I've just been growing episcias a little over a year now. What's up with the red growth on this 'butternut' ? Do I cut it off? Does the red growth have a different name? Plants are just like my teenagers- just gotta do their own thing!
If you take the red stolons off and root them and they retain their color and pass it on to subsequent stolons then you have what's called a sport. Quite a few named Episcias that are commonly grown have started as sports.
Episcias can change leaf color, texture and pattern in different growing conditions. That's one thing to keep in mind.
If the color is stable, then you basically have a new Episcia.
'Butternut' , 2006, Belisle's Violet House cat. "Iridescent green/pink pebbled leaves." (Yes, it says "cat"). I'm assuming that is Marcia Belisle, you could contact her. Sorry I wasn't more helpful. I bought this registry for our club but this is the first time I've used it and it wasn't very helpful for this variety.