Tree fern (Ferns and Horsetails)
Ferns first arose around 350 million years ago. They have tiny thalloid gametophytes, and large, persistent sporophytes. Tree ferns look similar to the fossil ancestors of living seed plants. The ‘trunk’ of the fern is formed from the remains of old branches, and the rhizomes grow down through this. Dicksonia antarctica is native to Eastern Australia.