Spiny orb-weaver, Gasteracantha cancriformis ( Plate 6). The spiny orb-weaver spider is one of the most colorful and easily recognized spiders in Florida. The dorsum of the abdomen is usually white with black spots and large red spines on the margin. Females are 5 mm to 10 mm long and 10 mm to 14 mm wide. The webs typically contain tufts of silk, which may prevent birds from flying into them.
Taken with Cannon SX120 IS
Taken in front yard between hedges. You can see the web faintly.
I had never seen one before and looked up Florida Spiders.
Port Orange, Florida