Types of fossil spores and pollen. Left, top, spore of the large black tree-fern, Cyathea medullaris (Forst. f.) Swartz, found from the Upper Pliocene to the present day;
This information was published in 1966 in An Encyclopaedia of New Zealand, edited by A. H. McLintock. It has not been corrected and will not be updated.
Up-to-date information can be found elsewhere in Te Ara.