two native species of Cyathea, as well as a naturally
occurring hybrid between these species. These are all true tree
ferns, and differ from the other genus of tree fern (Dicksonia)
in that the trunks are not fibrous and the sporangia are on the
lamina away from the edge. The sori may be naked or covered with a
peltate (umbrella-like), membranous indusium.