Not sure what flower/bush this is, but the bees really love it. It appears to have both pollen and nectar.
(http://i611.photobucket.com/albums/tt198/bhfury/beesonflower20090827047.jpg)
(http://i611.photobucket.com/albums/tt198/bhfury/Beesonflower20090829018.jpg)
Rose of Sharon
Excellent.... thanks...
Also known as Althea Bush.
It's a cultivar of mallow, related to the hibiscus.
Looks like it could be a lavatera. I have several and the bees love them for nectar and pollen, almost year round here in California.
Cheers,
Patrick