Cydista and Pachystegia, are related to what?
Pachystegia Pachystegia is a genus of shrubs in the daisy family described as a genus in 1925.
Cyrtomium Cyrtomium is a genus of about 15-20 species of ferns in the family Dryopteridaceae, native to Asia, Africa (including Madagascar), and the Pacific Ocean islands (Hawaii). It is very closely related to the genus "Polystichum", with recent research suggesting it should be included within it (Little & Barrington).