I was on Wikipedia a few days ago and found they have fairly extensive lists on Pollen and Nectar plants with emphases on Honey Bees liking them.
Pollen List
http://en.wikipedia.org/wiki/Pollen_source
Nectar List
http://en.wikipedia.org/wiki/Northern_Nectar_Sources_for_Honey_Bees
Those are very nice lists.
The only thing I saw missing was citrus from the nectar source. Did I miss it?
Sincerely,
Brendhan
Man that is a list. I saved it as a favorite and will be contating my brother in law for some of those plants marked as "very-good.." He owns a greenhouse so if he doesnt have them he can order for me. Thanks again for the list.