Plenasium
Plenasium is a genus of ferns in the family Osmundaceae. It is recognized in the Pteridophyte [Phylogeny Group] classification of 2016, but kept within a more broadly circumscribed genus Osmunda by other sources. The genus is known from Early Cretaceous to present.
Taxonomy
, the Checklist of Ferns and Lycophytes of the World accepted the following four species:Phylogeny of Plenasium
The following fossil species are also accepted.
- †P. arnoldii Bomfleur, Grimm & McLoughlin 2017
- †P. bransonii Bomfleur, Grimm & McLoughlin 2017.
- †P. burgii Bomfleur, Grimm & McLoughlin 2017.
- †P. chandleri Bomfleur, Grimm & McLoughlin
- †P. crossii Bomfleur, Grimm & McLoughlin 2017.
- †P. dakotense Bomfleur, Grimm & McLoughlin 2017.
- †P. dowkeri Bomfleur, Grimm & McLoughlin 2017
- †P. moorei Bomfleur, Grimm & McLoughlin 2017.
- †P. nebraskense Bomfleur, Grimm & McLoughlin 2017.
- †P. ''elegans Hiller et al. 2019
- †P. xiei'' Cheng et al. 2019