Athorn forest is a densescrubland with vegetation characteristic of drysubtropical and warmtemperate areas with a seasonal rainfall averaging 250 to 500 mm (9.8 to 19.7 in).
Is present in the southwest ofAfrica with smaller areas in other places of Africa.
Thorn forests cover a large part of southwesternNorth America.
In South America, the thorn forest is calledCaatinga, and consists primarily of small, thorny trees that shed their leaves seasonally. Trees typically do not exceed 10 metres (33 ft) in height, usually averaging between 7 and 8 metres (23 and 26 ft) tall.
Caatinga is considered a xeric shrubland and thorn forest,[2] but contains the ecoregionCaatinga Enclaves moist forests that is consideredTropical and subtropical dry broadleaf forests.
Thorn forests blend intosavanna woodlands as the rainfall increases and into deserts as the climate becomes drier.[5]