That about the White Tree. In the rules "The White Tree is only found on the black die", but on the picture I see it on both the green and blue dice. What is right - picture or text?

Wait some more and cross-check with people at BGG who have acquired the game. If the symbol's on the finalized version of the dice, then, the picture's correct, otherwise it's the text (sorry that I can't help more)

That about the White Tree. In the rules "The White Tree is only found on the black die", but on the picture I see it on both the green and blue dice. What is right - picture or text?

The White Tree is indeed only found on the black die.

What is instead of the tree on the colored dices?