polygonum polymorphum

---

I have an ornamental grass book that recommends this as a good companion plant for the back of a grass border.  I cannot find it in Botanica or in Sunset.  The plantsman/author of the book is from the Netherlands so maybe that's why I can't locate it checking my usual sources.  Also, if anyone is familiar with this plant, would it even be appropriate for my Central Valley CA garden?

I am also looking at Olearia, Osmanthus and Michelia dolstopa figo as alternatives if anyone can comment on the virtues or drawbacks to any of these.

Thanks very much in advance.