I hate to be a pain...but a couple of my plant images were moved from Calylophus berlandieri to Oenothera berlandieri. I'm confused! When I googled the latter species, many site show pink primroses and refer to it as mexican primrose. Mine isn't pink and doesn't look similar.
This is the primrose plant I am growing:
Actually the closest I can find to that is this:
http://www.wildflower.org/gall...
Still a Calylophus berlandieri, but ssp. pinifolius.