| Schizaeaceae | |
|---|---|
| |
| Schizaea cf. bifida from Waratah Track, Ku-ring-gai Chase National Park, Australia | |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Division: | Polypodiophyta |
| Class: | Polypodiopsida |
| Order: | Schizaeales |
| Family: | Schizaeaceae Kaulf. |
| Genera | |
Schizaeaceae is a family of ferns in the order Schizaeales. In the Pteridophyte Phylogeny Group classification of 2016 (PPG I), it includes only two genera. Alternatively, two families kept separate in PPG I, Lygodiaceae and Anemiaceae, may be included in Schizaeaceae (as the subfamilies Lygodioideae and Anemioideae) so that the family has four genera. In this approach, the Schizaeaceae of PPG I is treated as the subfamily Schizaeoideae.
Species are mainly distributed in the tropics, but several are found in temperate regions in North America, South Africa, Australasia and Northeast Asia. The sporangia are borne on specialised pinnae, distinct from ordinary vegetative pinnae. The pinnae form small comb-like, pinnate structures on which the sporangia are formed.
Genera
In the narrow circumscription of the family, there are two genera:
- Actinostachys Wall
- Schizaea Sm.
Two further genera are included in the broader circumscription:
- Anemia Sm. – otherwise placed in the monotypic family Anemiaceae
- Lygodium Sw. – otherwise placed in the monotypic family Lygodiaceae
References
- ^ PPG I (2016). "A community-derived classification for extant lycophytes and ferns". Journal of Systematics and Evolution. 54 (6): 563–603. doi:10.1111/jse.12229. S2CID 39980610.
- ^ Christenhusz, Maarten J.M. & Chase, Mark W. (2014). "Trends and concepts in fern classification". Annals of Botany. 113 (9): 571–594. doi:10.1093/aob/mct299. PMC 3936591. PMID 24532607.
- ^ "Schizaeaceae Kaulf". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2019-11-24.
- Christenhusz, M. J. M. & Byng, J. W. (2016). "The number of known plants species in the world and its annual increase". Phytotaxa. 261 (3). Magnolia Press: 201–217. doi:10.11646/phytotaxa.261.3.1.
- "Actinostachys Wall". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2019-08-08.
- "Schizaea Sm". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2019-08-08.
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