All the brooms and their relatives -LRB- including Laburnum and Ulex -RRB- are natives of LOCATION@1 , north LOCATION@2 and southwest LOCATION@3 , with the greatest diversity in the LOCATION@4 region .

All the brooms and their relatives -LRB- including Laburnum and Ulex -RRB- grow in LOCATION@1 , north LOCATION@2 and southwest LOCATION@3 .
