Helianthemum – also known as rock rose, sunrose, rushrose, and frostweed. Pretty neat stuff…my only complaint is that it closes up early in the evening.
This particular bee wasn’t very interested in the pollen – I don’t think it was ready yet, yesterday – but she hovered around long enough for me to get almost good focus on a number of shots. And look at that huge pollen bucket (and beetongue!). Here’s one of them: