Was Antarctica even in the same place back then, you know with plate tectonics/continental drift and all that stuff?
How far back are we talking?
Before mammals, I think (or at least, before they were a significant presence). Obviously it was also during a warmer period in earth's history.
I don't remember the exact details, and I know that the continents seperate and recombine over time and this may very well have been a super continent, but I recall that there were forests at and very near the south pole at some point.
As it turns out, there are still two flowering plants in Antarctica. Though they are at the coastal regions, it's still far enough south to wonder how they live without the light.