'Fir tree' in the Bible

I will put in the waste land the cedar, the acacia, the myrtle, and the olive-tree; and in the lowland will be planted the fir-tree, the plane, and the cypress together:

In place of the thorn will come up the fir-tree, and in place of the blackberry the myrtle: and it will be to the Lord for a name, for an eternal sign which will not be cut off.

As for Ephraim, what has he to do with false gods any longer? I have given an answer and I will keep watch over him; I am like a branching fir-tree, from me comes your fruit.

Give a cry of grief, O fir-tree, for the fall of the cedar, because the great ones have been made low: give cries of grief, O you oaks of Bashan, for the strong trees of the wood have come down.