Ptisana is a genus in the eusporangiate fern family Marattiaceae, comprising species historically treated in the genus Marattia. The establishment of this genus follows the 2008 work by Andrew G. Murdock, which supported recognition of this group on the basis of …

ptisana General Information Symbol: PTISA: Group: Fern: Duration: Perennial: Growth Habits: Forb/herb: Native Status: PB N Download Distribution Data View Print Options Zoom in. Zoom out ...

Ptisana salicina, or king fern, is a species of fern native to Australia, New Zealand and the South Pacific. Large and robust with a distinctive tropical appearance, it has fronds up to 5 metres (16 feet +/-) tall that arise from a starchy base that was a traditional food for the Maori.

Eupodium and Ptisana. New combinations are made in Eupodium and Ptisana. Considerable monographic work still remains to be done, and is of particular importance given the threatened status of many presently poorly understood species in this family. KEYWORDS: Angiopteris, Christensenia, Danaea, Eupodium, Marattia, Marattiaceae, Ptisana I ...

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Feb 20, 2023 · Ptisana Murdock is a genus of ferns that is widely distributed in the Paleotropics. It was segregated from Marattia Sw. when the latter was found to be paraphyletic in a phylogenetic analysis of Marattiaceae (Murdock 2008a, b). Ptisana comprises 30-40 species, but determining the boundaries and relationships for some has proved challenging. The ...

Morphologically, Ptisana is characterized by deeply cut, fully fused, sessile synangia, sporangial apertures that lack labia, and the presence of sutures at the attachment point of ultimate segments (Murdock 2008b).

Ptisana purpurascens is a species of fern in the family Marattiaceae that is endemic to Ascension Island. It is considered a critically endangered species.

Based on phylogenetic molecular analyses the Ptisana fraxinea complex is discussed and several new combinations are proposed. The Seychellois Ptisana is most closely related to Ascension Island endemic P. purpurascens and is described as a new species, Ptisana laboudalloniana.

Murdock, Andrew G., 2008: A taxonomic revision of the eusporangiate fern family Marattiaceae, with description of a new genus Ptisana. Taxon, vol. 57, no. 3. 737-755. What is GBIF?