We’ve just heard that our review paper on Dryopteris evolution has been accepted for publication in Systematic Botany! It will be published in the second volume of 2015.
Sessa EB, L-B Zhang, H Väre, A Juslén. What we do (and don’t) know about ferns: Dryopteris (Dryopteridaceae) as a case study. Systematic Botany.