Complex sentence: The tree and the wood are usually referred to by the Aboriginal name "jarrah"' and because of the similar appearance of worked jarrah timber to the Honduras mahogany, jarrah was once called Swan River mahogany after the river system that runs through Perth.
Split into simpler sentences: The tree and the wood are usually referred to by the Aboriginal name jarrah. Because of the similar appearance of worked jarrah timber to the Honduras mahogany, jarrah was once called Swan River mahogany after the river system that runs through Perth.