'Brier' in the Bible

Instead of the thorn shall come up the fir-tree; and instead of the brier shall come up the myrtle-tree: and it shall be to Jehovah for a name, for an everlasting sign that shall not be cut off.

And there shall be no more a pricking brier unto the house of Israel, nor a hurting thorn of any that are round about them, that did despite unto them; and they shall know that I am the Lord Jehovah.

The best of them is as a brier; the most upright is worse than a thorn hedge: the day of thy watchmen, even thy visitation, is come; now shall be their perplexity.