'Brambles' in the Bible

They bray among the bushes; under the brambles they are gathered together:

And thorns shall come up in her palaces, nettles and brambles in the fortresses thereof: and it shall be an habitation of dragons, and a court for owls.

By their fruits you will easily recognize them. Are grapes gathered from thorns or figs from brambles?

for each tree is known by its own fruit. For figs are not gathered from thorns, nor are grapes picked from brambles.