Tiny white bugs make me want to say whitefly, but spider-looking makes me want to say mites. That they're just on the flowers, though, may mean they're actually aphids.
(Sheesh, bug season must be erupting everywhere...) Whatever they are, though, I would spray the plant down with an insecticide designed for ornamentals, or you could use an insecticidal oil like Neem.
Many growers repot and spray any new plant they get just as a matter of course, to be sure nothing comes in to affect other plants in the growing area.
Don't wait too long though; you want to get them before they spread...
(Pretty flowers too, by the way.....)