| Jarrahdale |
Darling Scarp / Laterite |
Gravelly clay; elevated; higher rainfall |
Jarrah, marri, banksia, snottygobble |
| Serpentine (incl. NP & River Valley) |
Darling Plateau / Valley loams & clays |
Clay loams, gravel; well-drained forested areas |
Jarrah, marri, flooded gum, banksia, shrubs |
| Mundijong |
Pinjarra Plain – Guildford & Beermullah |
Alluvial clays/loams; some waterlogging |
Paperbark, sheoak, marri, flooded gum |
| Cardup |
Foothills – Forrestfield; some Guildford |
Sandy-gravel; well-drained Ridge Hill Shelf |
Jarrah, marri, banksia, sheoak, woody pear |
| Byford (east of SW Hwy) |
Foothills – Forrestfield |
Sand & gravel; slightly elevated |
Jarrah–marri woodland, banksia understorey |
| Byford (west of SW Hwy) |
Pinjarra Plain – Guildford / Serpentine River |
Loams & clays on low plains; poorly drained areas |
Sheoak, paperbark, sedges, marri |
| Oakford |
Bassendean Sands / Southern River |
Pale sands; low fertility; wet depressions |
Banksia woodland, woollybush, paperbark |
| Whitby & Karrakup |
Transition – Darling Plateau → Pinjarra Plain |
Gravel to clay-loam; drainage lines |
Jarrah, marri, wandoo, shrubs |
| Keysbrook |
Pinjarra Plain – Beermullah & Serpentine River |
Fertile clays/loams; flat; wetland areas |
Paperbark, flooded gum, sedges |
| Hopeland |
Bassendean & Southern River |
Sands over clay; can be acidic/waterlogged |
Banksia woodland, marri, flooded gum |