Zanthoxylum externum
| Zanthoxylum externum | |
|---|---|
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Sapindales |
| Family: | Rutaceae |
| Genus: | Zanthoxylum |
| Species: | Z. externum |
| Binomial name | |
| Zanthoxylum externum (Skottsb.) Stuessy | |
| Synonyms | |
|
Fagara externa Skottsb. | |
Zanthoxylum externum is a species of flowering plant in the family Rutaceae. It is a tree endemic to Alejandro Selkirk Island in the Juan Fernández Islands of Chile.
It grows in lower montane myrtisilva (myrtle forests) from 400 to 700 meters elevation, where Myrceugenia schulzei is the dominant tree. According to historical records Fagara externa was once abundant, but is now scarce. In 2006 it was estimated that there are 500 to 1,000 individuals on the island, with the largest concentration in the El Blindado sector. The species' area of occupancy (AOO) is estimated to be <10 km2. In 2023 the IUCN Red List assessed the species as critically endangered.
References
- 1 2 3 Cádiz, A. (2023). "Fagara externa". IUCN Red List of Threatened Species. 2023 e.T30465A242688705. doi:10.2305/IUCN.UK.2023-1.RLTS.T30465A242688705.en. Retrieved 1 February 2025.
- ↑ "Zanthoxylum externum (Skottsb.) Stuessy". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 12 November 2026.
- ↑ Josef Greimler, Patricio López-Sepulveda, Karl Reiter, Carlos Baeza, Patricio Peñailillo, Eduardo Ruiz, Patricio Novoa, Alejandro Gatica, and Tod Stuessy "Vegetation of Alejandro Selkirk Island (Isla Masafuera), Juan Fernández Archipelago, Chile," Pacific Science 67(2), 267-282, (1 April 2013). https://doi.org/10.2984/67.2.9
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