I'm not a spider. Really.
This orb weaving spider is standing so that it appears to have only four legs. Is it trying to pretend to be a vertebrate? Its cephalothorax is also covered in fine white hairs. Seen on a beautifully foggy morning in Crystal Cove State Park, there are a few drops of dew on the spider itself. My best guess is that this is in genus _Argiope_.