It forms dense thickets which are difficult to penetrate, thus the common name.

This is a plant which forms bushes or thickets of many individuals in the desert sand.

It also forms dense thickets and thrives in disturbed areas.

Although one downside is this shrub can often forms dense thickets.

It often has several trunks and can form impenetrable thickets.

The plant also provides cover when it forms dense thickets.

Plants may form thickets or be spaced at a few times their width in "gardens".

In sunny sites it grows better and can form dense thickets.

The trees grow in clusters, to 5 m high, usually forming dense thickets.

It forms low, dense, thorny thickets of shiny dark green leaves.