drinnen: So am I the only Australian amazed at this?
I mean you've got this molten rock flowing through forests and the trees nearby are completely un-onfire, if you dropped some lava in an australian forest every tree for 10km would panic and burst into flames instantly.
Here's one way to think of this.
In Hawaii, volcanic eruptions are a constant thing; they'er not a rare event. Therefore, any long-lived plant that would burn from being near lava would not survive there. Therefore, natural selection will determine that only plants that are capable of surviving being near lava will persist in this environment.
In Australia, the forests have not been subject to this environmental pressure, and have therefore not evolved to deal with it. In fact, if such a situation were to happen in Australia, the results might not be pretty. I could, for example, compare this to the introduction of rabbits in Australia; the life down there had evolved without any need to account for rabbits, so it fails to account for them. Then some European settler brings some rabbits over, and the results are not pretty; the rabbits breed like rabbits and become an invasive species.