Abstract
This symposium was organized to publicly discuss the controversy over the relationships of the Psilotaceae, centering around Bierhorst’s thesis thatPsilotum andTmesipteris are filicalean ferns.
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White, R.A. Taxonomic and morphological relationships of the psilotaceae: Introduction to the symposium. Brittonia 29, 1–2 (1977). https://doi.org/10.2307/2805737
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DOI: https://doi.org/10.2307/2805737