Well-drained under wooded grassland in gneissic drift. Photo: Roger Pitblado.

Well-drained under woodland - Nguru series. Photo: Roger Pitblado.

Black spruce on soil subject to cryoturbation. Photo: S. Zoltai.

General view of a laterite in Western Australia; slide by S.R. Shea.

Jarrah forest (Eucalyptus marginata) on laterite in Western Australia. Slide by S.R. Shea.

Young Jarrah (Eucalyptus marginata) in western Australia; slide by S.R. Shea.

Dead Eucalyptus marginata (jarrah) on coast in western Australia due to Phytophthora cinnamomi; photo by S.R. Shea

Typical dieback in jarrah due to Phytphthora cinnamomi; photo by S. R. Shea.

Killed forest of Jarrah from Phytophthora cinnamomi; photo by S.R. Shea.

Eucalyptus calophylla, alive but remaining forest of Jarrah killed by Phytophthora cinnamomi; Photo: S.R. Shea.