What I'm looking for has skinny leaves and stays low. It's the foreground plant in the photo; I think you're right that the rear plant is green wendtii. The closest thing I've been able to find today is the x willisii. But another photo elsewhere of that plant (willisii) looked quite a bit different.
I guess I'll try that next time I go plant shopping. I'm sure I'll find a home for it if it turns out to be different from what I was expecting. :hihi: