Lomariopsidaceae
The Lomariopsidaceae are a family of genuine ferns ( Polypodiopsida ).
Features
The rhizomes are creeping, sometimes - at hemiepiphytischen types - even climbing. The petioles have round the vascular bundles, which are arranged in a roof gutter- shaped. The spreading are simply pinnate. The leaflets are entire or notched, often articulated, auriculate in some species. The nerves terminate freely, are usually parallel or fiederförmig.
The sori are round, covered with a round to kidney-shaped indusium, or even without indusium. The sporangia can akrostich are ( at the top ) and the leaves be with dimorphic. The spores are bilateral, have a scar ( monolet ) and are different winged and ornamented.
The basic chromosome number is x = 41, with some Lomariopsis species also smaller numbers occur.
System
The family includes four genera with a total of around 70 species:
- Cyclopeltis J. Sm, with about two to six species from tropical Asia and in America.
- Lomariopsis Fée, with about 31 to 45 species in the tropics.
- Sword fern ( Nephrolepis Schott), with about 15 to 30 species, including the commonly cultivated as a house plant fern: Nephrolepis exaltata (L.) Schott, whose home: North and South America.
- Thysanosoria pteridiformis ( Ces. ) C. Chr
The definition of family is not well secured. The genus Nephrolepis will eventually put back into its own family Nephrolepidaceae.
Documents
- Alan R. Smith, Kathleen M. Pryer, Eric Schuettpelz, Petra coral, Harald Schneider, Paul G. Wolf: A classification for extant ferns. In: taxon. Volume 55, No. 3, 2006, ISSN 0040-0262, pp. 705-731, Abstract, PDF file.
- David John Mabberley: The Plant-Book. A portable dictionary of the higher plants. Cambridge University Press, Cambridge, among other things, 1987, ISBN 0-521-34060-8.