Ptisana ambulans : A type specimen B live plant of type collection C abaxial surface of ultimate segment D segment attachment points and terminus of the costa. Photos: C.-W. Chen.

  Part of: Murdock AG, Chen C-W, Huang Y-M, Glenny D (2020) Affinities of the fern genus Ptisana (Marattiaceae) in the Solomon Islands, with descriptions of two new species. PhytoKeys 170: 1-23.