Bowenia
Stangeria
Stangeriaceae is the little personal of cycads, both within total of dwelling & fossil species. A personal contains single 2 residing genera, Stangeria and Bowenia, though the latter genus has been recommended for placement inside the separate personal by itself.
A personal is recognized by with vascularized stipules, & by lacking cataphylls, or even producing the two irregularly. These unusual characters led to the original description of Stangeria as a fern, and it was only if seeds were later produced on the plant that its confessedly affinities were realized.
Though now a personal occurs just within South Africa and Queensland, Australia, fossils are known from either Jurassic sediments in the British Isles. Recent cladistic studies suggest that a fossil taxonomic category Mesodescolea could too use at times affinities by having a Stangeriaceae. This extremely lobate fossil leaf from either a Lower Cretaceous has only been incurred around Argentina.
fr:Stangeriaceae
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