Cyatheales

order of plants Cyatheales (Cyatheales) is an order comprising closely related families of organisms. It contains 3 families with 5 known species. This includes the family groups Culcitaceae, Cyatheaceae, and Dicksoniaceae. Among its members, 1 species are currently classified as threatened (Critically Endangered, Endangered, or Vulnerable). It belongs to Polypodiopsida (Polypodiopsida).