What color were the conifers, cycads, and other vegetations in the polar forest regions of Earth during the Mesozoic? Were they normally colored foliage, or were they strange colors like that one azure blue plant (Begonia pavonina)? Take into account the 5 months of pure sunlight and five months of pure darkness each at 85 degrees latitude.

I imagine that the foliage there was quite bizarre (especially in Australia and Antarctica), due to either high light levels or low light levels depending on the season.