Only in the valley bushveld of the Eastern Cape will you find karoo succulents growing alongside both Afromontane, and tropical forest species. Species originating in the Nama –Karoo, the Highveld Grassland, the Drakensberg Montane Grassland, Woodland and Forest, the KwaZulu–Cape Coastal Forest Mosiac, the Maputaland –Pondoland Bushland and Thicket, the Knysna–Amatole Montane Forest and the Montane Fynbos and Renosterveld all come together in the Eastern Cape. Aside from its unusual diversity, the dense bush found at Olivewood is similar in structure to thicket found throughout tropical and subtropical Africa . Vegetation consists of many evergreen and succulent trees, shrubs, and woody creepers. Unlike typical tropical forests, the vegetation is dense and often spiny with squat trees and shrubs typically rising to only 2 to 2.5m, larger trees are common only in more sheltered areas deep in the valleys. Characteristic succulent species include the bitter aloe (Aloe ferox), Euphorbia ledienii, Euphorbia grandidens, and portulacaria afra (speckboom). Commonly found genera of trees include Sideroxyolon (notably, white milkwood), Euclea, Cassine, Sersia (formally known as Rhus), Cussonia, and Diospyros.