HORTICULTURE

Detailed explanation-1: -oak, (genus Quercus), genus of about 450 species of ornamental and timber trees and shrubs in the beech family (Fagaceae), distributed throughout the north temperate zone and at high altitudes in the tropics.

Detailed explanation-2: -Oaks are predominant participants in a wide variety of forest types, including temperate deciduous oak forests and evergreen stands from temperate to tropical zones. About half of the oak species are deciduous trees or shrubs.

Detailed explanation-3: -Oaks were the dominant trees, hence the term oak savanna. Savannas grade into both prairie and forest. Curtis (1959) defined savanna as having no less than one tree per acre and no more than a 50% tree canopy.