King Ferns are recognizable anywhere. They are always or almost always in rainforest, have gigantic huge fronds (yes, the whole frond you see above is one leaf), which is not quite as dissected as most other tree ferns (Cyathea, Dicksonia etc) but much larger and longer than most other terrestrial ferns. However, unlike tree ferns, King Ferns such as Marattia have a somewhat ‘bulbous base’ and no trunk. These are primitive ferns, the likes of which are still scattered among the great tropical rainforest formations of the world. It is always a pleasure to behold.
So this is a rather distinctive fern, but the other more famous King Fern (Angiopteris evecta) in FNQ is very similar. However, Marattia tends to be smaller and the details of the spore sac clusters or sori differ.