Figure 6 from: 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. https://doi.org/10.3897/phytokeys.170.59471 - Murdock, Andrew G. (2020)