Thorn forest

A thorn forest is a dense scrubland with vegetation characteristic of dry subtropical and warm temperate areas with a seasonal rainfall averaging 250 to 500 mm (9.8 to 19.7 in).

Thorn forests cover a large part of southwestern North America.

In South America, the thorn forest is called Caatinga, and consists primarily of small, thorny trees that shed their leaves seasonally.

Caatinga is considered a xeric shrubland and thorn forest,[2] but contains the ecoregion Caatinga Enclaves moist forests that is considered Tropical and subtropical dry broadleaf forests.

Thorn forests blend into savanna woodlands as the rainfall increases and into deserts as the climate becomes drier.