Hi jbaron, the pictures are a bit small to tell for sure but if I had to make a conjecture I would say rainlillies more properly known as Zephyranthes.
Here is a short descriptive blurb from another forum I sometimes thumb through. "Rainlily- these small bulbs earned the name "rainlily" because they often flower within a few days after rainfall. From spring through fall, rainlily can produce flushes of star-shaped, crocus-like flowers that are white, pink or yellow, depending on the species. Rainlily's easy care, broad adaptability and beautiful, starry flowers make it ideal for gardens in Florida!"