all the contest is asking for is a winter picture, so that means taken in winter of what winter around you means to you.
if I lived in florida, I'd probably take a picture of the flowers that bloom in winter, or trees that have lost leaves (i know there's not many that do that down there, but it happens.)
or, palm trees and such just to rub salt in our wounds
think how many people vacation in winter, palm trees are a part of many peoples winter. I feel the theme is pretty open to interpretation.