The probability of being Oeceoclades maculata is very high. The plant arrived in Florida courtesy of hurricane Andrew and has seeded itself all over south Florida. It is native to africa.
The State of Florida considers it an invasive weed. Do not plant this in the ground outside as it will spread everywhere. It is self seeding and seeds grow easily.
The flowers are small (1/2") and mostly white. Not very impressive. It is a terrestrial plant and grows well in any soil.
Here is the flower