The upper parts of the ridge and spurs are covered with thick forests of pine , oak , sycamore , horse-chestnut , and wild cherry ; but the slopes are stony and barrenBlack Mountain - Imperial Gazetteer of LOCATION@1 , v. NUMBER@1 , p. NUMBER@2 .

The upper parts of the ridge are covered with thick forests of pine , oak , sycamore , horse-chestnut , and wild cherry ; but the slopes are stony and barrenBlack Mountain - Imperial Gazetteer of LOCATION@1 , v. NUMBER@1 , p. NUMBER@2 .
