Hello David, I agree with glengarry23, that you have some great photos of your Grasses.
I wondered if you had ordered any of your collection from Bluestem Nursery, near here, in Christina Lake and GrandForks B.C. I just went to their website, www.bluestem.ca which is such a treasure trove of information about Grasses and also Willows and other suitable Perennials. Patrinia in particular, seems to go well with grasses.
Cheers, Nora