Oenothera pilosa

Neat little (non-aggressive) Oenothera that I got from Arrowhead Alpines a few years back. I'd have to check my papers, but I'm pretty sure it was called Oenothera pilosa. I've been putting pollen on it from the sort of invasive pink Oenothera speciosa. I think I've tried it before with no luck but "hope springs eternal".