We're brought up to believe that certain groups of plants and animals belong in certain climates. That if you try to transplant these flora or fauna to a whole different biome that it won't work.
So cacti belong in deserts. Right? They only grow in warm areas with very low amounts of precipitation.
Yet these guys were thriving on the key. And Florida gets significant rainfalls *most* days. There are these two or three-o'clock showers that come with the warming of the day very frequently.
|Prickly Pear Cactus (064 - 2012)|
And just for fun... some of those amazing clouds that bring in those afternoon showers. They start as whispy little things around dawn and build as the day goes on and more and more moisture is evaporated off the gulf (and whatever other bodies of water are around) until they get so heavy that you get about an hour of rain each afternoon during the rainy season. And yet, the cacti seem to do just find in this environment.