Before revision: E. Elevation range Coastal Lower plains Upper plains Lower highlands Upper highlands Montane F. Substrate Shallow soils Deep soils Soily Sandy Gravelly Rocky Dystrophic Mesotrophic Eutrophic Ridge Slope Thalweg Riverine Floodplain Marshy Swampy Other Other important schemes: Grisebach (1872), Tansley and Chipp (1926), Rübel (1930), Burtt Davy (1938), Beard (1944, 1955), André Aubréville (1956, 1957), Trochain (1955, 1957), Dansereau (1958), Küchler (1967) .
After revision: , Webb and Tracey (1975)E. Elevation range Coastal Lower plains Upper plains Lower highlands Upper highlands Montane F. Substrate Shallow soils Deep soils Soily Sandy Gravelly Rocky Dystrophic Mesotrophic Eutrophic Ridge Slope Thalweg Riverine Floodplain Marshy Swampy Other Other important schemes: Grisebach (1872), Tansley and Chipp (1926), Rübel (1930), Burtt Davy (1938), Beard (1944, 1955), André Aubréville (1956, 1957), Trochain (1955, 1957), Dansereau (1958), Küchler (1967) .