I find this tiny beetle down in the very center of California Poppy all the time. It is tiny enough that I could never see it clearly so I took a macro with my Iphone and here it is. I can't see that it does any nibbling not that that would be a problem. Looks like it loves a pollen bath though.

It appears to have short 'elytra', the general appearance and size suggest one of the Short-winged Flower Beetles ..

http://bugguide.net/node/view/...

If the wings are not short, the hairiness suggest Family Byturidae ..

http://bugguide.net/node/view/...

Bear in mind there's a lot of similar looking beetles and only a fraction of those are represented on bugguide.

Thanks that gives me a starting points and will save me some time.