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 genetic analysis and morphology.[1][2] Ptisana can be distinguished from Marattia by the presence of distinct sutures at the point of leaflet attachment, deeply cut synangia, and the absence of labiate sporangial apertures. The name Ptisana is derived from the Latin word for pearl barley, an allusion to the shape of the synangia.[1]
| Ptisana | |
|---|---|
| |
| King fern, Ptisana salicina | |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Division: | Polypodiophyta |
| Class: | Polypodiopsida |
| Order: | Marattiales |
| Family: | Marattiaceae |
| Genus: | Ptisana Murdock |
| Type species | |
| Ptisana salicina (Sm.) Murdock
| |
| Species | |
Ptisana has a palaeotropical distribution, with the westernmost extreme of the range in Ascension Island and extending eastward through tropical Africa, Asia, and Oceania. Ferns in this genus are generally quite large, with fronds often reaching 2–3 meters in length; the one known exception to this is Ptisana rolandi-principis, a critically endangered dwarf species endemic to the Plateau de Dogny in New Caledonia.[3] The basal chromosome number for Ptisana is 2n=78, whereas the one count for Marattia in the strict sense is 2n=80.[4] The type species for the genus is Ptisana salicina, the type specimen of which was collected on Norfolk Island.[1]
Species
editAs of June 2024[update], World Ferns accepts the following 36 species:[5]
- Ptisana africana Christenh. – East Africa
- Ptisana ambulans Murdock & C.W.Chen – Solomon Islands
- Ptisana attenutata (Labill.) Murdock – New Caledonia
- Ptisana boivinii (Mett. ex Kuhn) Senterre & Rouhan – Madagascar
- Ptisana boninensis (Nakai) Yonek. – Bonin Islands
- Ptisana costulisora (Altson) Murdock – New Guinea and nearby islands
- Ptisana decipiens Murdock & C.W.Chen – Solomon Islands
- Ptisana fraxinea (Sm.) Murdock – Africa to India, including Indian Ocean islands
- Ptisana grandifolia (Copel.) Murdock – New Guinea
- Ptisana howeana (W.R.B. Oliver) Murdock – Lord Howe Island
- Ptisana kingii (Copel.) Christenh. – New Guinea
- Ptisana koordersii (Alderw.) Christenh. – Sulawesi
- Ptisana laboudalloniana Senterre & I.Fabre – Seychelles
- Ptisana melanesica (Kuhn) Murdock – New Guinea and nearby islands
- Ptisana mertensiana (C.Presl) Murdock – Micronesia
- Ptisana novoguineensis (Rosenst.) Murdock – New Guinea
- Ptisana obesa (Christ) Murdock – New Guinea
- Ptisana odontosora (Christ) Senterre & Rouhan – Guinea
- Ptisana oreades (Domin) Murdock – northern Australia
- Ptisana papuana (Alderw.) Murdock & C.W.Chen – Solomon Islands
- Ptisana paleolata (Alderw.) Govaerts & Christenh. – Sumatra
- Ptisana pellucida (C.Presl) Murdock – Malaysia, Philippines
- Ptisana platybasis (Copel.) Murdock – New Guinea
- Ptisana purpurascens (de Vriese) Murdock – Ascension Island
- Ptisana rigida (Alderw.) Murdock – New Guinea, Sulawesi
- Ptisana robusta (Altson) Senterre & I.Fabre – São Tomé
- Ptisana rolandi-principis (Rosenst.) Christenh. – New Caledonia
- Ptisana salicifolia (Schrad.) Senterre & Rouhan – South Africa, Zimbabwe, Malawi and Mozambique
- Ptisana salicina (Sm.) Murdock – king fern; South Pacific islands, including New Guinea
- Ptisana sambucina (Blume) Murdock – Malesia and Vietnam
- Ptisana senterreana Christenh. – Cameroon, Gabon, Equatorial Guinea
- Ptisana smithii (Mett. ex Kuhn) Murdock – Vanuatu, Fiji, Samoa, Tonga
- Ptisana soluta (Compton) Murdock & Perrie – New Caledonia
- Ptisana squamosa (Christ) Murdock – New Guinea
- Ptisana sylvatica (Blume) Murdock – Malesia
- Ptisana ternatea (de Vriese) Murdock – Moluccas, New Guinea, the Philippines
Phylogeny
edit
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
References
edit- ^ a b c Murdock, Andrew G. (2008). "A taxonomic revision of the eusporangiate fern family Marattiaceae, with description of a new genus Ptisana". Taxon. 57 (3): 737–755. doi:10.1002/tax.573007.
- ^ Murdock, Andrew G. (2008). "Phylogeny of marattioid ferns (Marattiaceae) inferring a root in the absence of a closely related outgroup". American Journal of Botany. 95 (5): 626–641. doi:10.3732/ajb.2007308. PMID 21632388.
- ^ Shepherd, Lara D.; Murdock, Andrew G.; Amice, Rémy; Perrie, Leon R. (2023-02-20). "A synopsis of Ptisana Murdock ferns (Marattiaceae) in New Caledonia based on sequence data and morphology with the recognition of a new vulnerable species, P. soluta (Compton) Murdock & Perrie, comb. nov., stat. nov". Adansonia. 45 (3). doi:10.5252/adansonia2023v45a3. ISSN 1280-8571. S2CID 257914121.
- ^ Smith, Alan R; Mickel, John T (1977). "Chromosome counts for Mexican ferns". Brittonia. 29 (4): 391–398. Bibcode:1977Britt..29..391S. doi:10.2307/2806481. JSTOR 2806481. S2CID 24260292.
- ^ Hassler, Michael. "World Plants: Ferns and Lycophytes list". World Ferns. Synonymic Checklist and Distribution of Ferns and Lycophytes of the World. Retrieved 25 June 2024.
- ^ Nitta, Joel H.; Schuettpelz, Eric; Ramírez-Barahona, Santiago; Iwasaki, Wataru; et al. (2022). "An Open and Continuously Updated Fern Tree of Life". Frontiers in Plant Science. 13: 909768. doi:10.3389/fpls.2022.909768. PMC 9449725. PMID 36092417.
- ^ "Tree viewer: interactive visualization of FTOL". FTOL v1.6.0 [GenBank release 259]. 2024. Retrieved 17 August 2024.
 | This fern-related article is a stub. You can help Wikipedia by expanding it. |