# Asplenium majoricum

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***Asplenium majoricum*** is a tiny [fern](/source/Fern) [endemic](/source/Endemism) to [Mallorca](/source/Mallorca) ([Serra de Tramuntana](/source/Serra_de_Tramuntana)), and some locations in [Valencia](/source/Valencia) and south of [Catalonia](/source/Catalonia), Spain. It belongs to the family [Aspleniaceae](/source/Aspleniaceae). This allotetraploid hybrid (2n = 144 chromosomes) is the result of crossbreeding between the diploid ferns *[Asplenium fontanum](/source/Asplenium_fontanum)* subsp. *fontanum* (2n = 72 chromosomes) and *[Asplenium petrarchae](/source/Asplenium_petrarchae)* subsp. *bivalens* (2n = 72 chromosomes), followed by the spontaneous doubling of the number of chromosomes. Its fronds measure between 6 and 12 cm (5 in). The sori are longer than they are wide, with a side indusie, and are located near the central line of the pinnae. Sporulation occurs from March to November.

## Habitat

This small fern lives among the stones of the walls of the terraces and in the crevices of limestone rocks oriented North and Northwest. It likes light but not direct sun. In the dry summer months enters in estivation (summer sleep), dehydrating the fronds until apparently dead. With the first rains of autumn, the fronds will rehydrate in less than 24 hours and turn green as if nothing had happened. A few days starting to sprout new fronds. Stops in the middle of winter to spring, restarting sprouting in the spring.

## Hybrids

- *Asplenium × reichsteinii*: hybrid between *Asplenium majoricum* and its parent *Asplenium fontanum* subsp. *fontanum*.
- *Asplenium × orellii*: hybrid between *Asplenium majoricum* and *Asplenium trichomanes* subsp. *quadrivalens*.
- *Asplenium × sollerense*: hybrid between *Asplenium majoricum* and *Asplenium petrarchae* subsp. *petrarchae*.
- *Asplenium × barrancense*: hybrid between *Asplenium majoricum* and *[Asplenium ceterach](/source/Asplenium_ceterach)* subsp. *ceterach*.

## References

- [Description of *Asplenium majoricum*](http://www.floraiberica.es/floraiberica/texto/pdfs/01_020_01_Asplenium.pdf)
- [*Asplenium majoricum* in the Herbarium of Western Mediterranean](https://herbarivirtual.uib.es/cas-uib/especie/4416.html)
- [*Asplenium majoricum* in the book "Helechos de la Comunidad Valenciana"](https://web.archive.org/web/20091221173228/http://bdb.cth.gva.es/ficha.asp?id=10724)
- [Study of *Asplenium majoricum*](http://dialnet.unirioja.es/servlet/fichero_articulo?codigo=70416&orden=77680)
- [See photos of *Asplenium majoricum*](https://web.archive.org/web/20110719114832/http://jardin-mundani.info/falgueres/aspleniaceas/asplenium.htm)

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Adapted from the Wikipedia article [Asplenium majoricum](https://en.wikipedia.org/wiki/Asplenium_majoricum) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Asplenium_majoricum?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.