Onocleaceae Pichi Sermolli.
A family of 4 genera and 5 species (but see below), of north temperate regions (PPG I 2016). The family as here circumscribed is monophyletic and sister to Blechnaceae (Smith et al. 2006b). Christenhusz, Zhang, & Schneider (2011) preferred to combine the 5 species in the family into the single genus (Onoclea).