Lastreopsis killippii is a monster of a plant. It can be diagnosed by it pinna-rachis architecture, reddish-brown scales, and enormous size. This collection was the first time I had encountered it in the field. Despite having previously studied herbarium specimens, I had no idea what it was when I met the real thing.
Labiak, P.H., Sundue, M., Rouhan, G., Hanks, J.G., Mickel, J.T. and Moran, R.C., 2014. Phylogeny and historical biogeography of the lastreopsid ferns (Dryopteridaceae). American Journal of Botany, 101(7), pp.1207-1228.