Quercus sagrana

Cuban oak
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Fagales
Family: Fagaceae
Genus: Quercus
Subgenus: Quercus subg. Quercus
Section: Quercus sect. Virentes
Species:
Q. sagrana
Binomial name
Quercus sagrana
Synonyms[2]
  • Quercus cubana A.Rich.
  • Quercus oleoides subsp. sagrana (Nutt.) Borhidi
  • Quercus oleoides var. sagrana (Nutt.) C.H.Mull.
  • Quercus virginiana var. sagrana (Nutt.) Trel.

Quercus sagrana, also spelled Quercus sagraeana, the Cuban oak, is a medium-sized evergreen tree native to western Cuba in the Cuban pine forests ecoregion. It is the only oak native to the Caribbean.

It is known in Cuban Spanish as encina del sur.[citation needed]

Taxonomy

The Cuban oak was first described by Nuttall in 1842 as Quercus sagraeana based on the specimen collected by Ramón de la Sagra.[3] Article 60.8(c) of the International Code of Nomenclature for algae, fungi, and plants provides that where personal names end in -a, the adjectival form of the specific epithet is formed by adding -n- plus the appropriate gender ending.[4] The International Plant Names Index has corrected Nuttall's sagraeana to sagrana in accordance with this article.[5]

Using the same specimen, but apparently unaware of the original name, Richard (1853) named the Cuban oak Q. cubana.[6] Trelease (1924) did not view Q. sagrana as a species in its own right but as a variety of Q. virginiana.[7] He proposed the name Q. virginiana var. sagrana. Muller (1961) renamed it Q. oleoides var. sagrana,[8] hypothesizing that the Cuban oak population was a subspecies of Q. oleoides, originating from the Yucatán region of Mexico, but with introgression from Q. geminata coming from Florida.[9] He considered the morphologically variable Cuban population a hybrid swarm that had stabilized and was distinct from the other live oaks of the Virentes. A recent study of molecular genetic variation and taxonomically informative leaf morphology shows that the Cuban oak shows little evidence of hybrid origin and is most similar to Q. virginiana, but distinct enough to be regarded as a separate species, Q. sagrana.[10] It is placed in section Virentes.[11]

Conservation

The species is considered Endangered by the IUCN Red List, due to habitat destruction and fragmentation of Cuban pine forests by mining, cattle grazing, urban development and fires in its endemic Pinar del Río Province.

See also

Wikispecies has information related to Quercus sagraeana.

References

  1. ^ Jerome, D (2020). "Quercus sagrana". IUCN Red List of Threatened Species. 2020: e.T89965324A89965347. doi:10.2305/IUCN.UK.2020-3.RLTS.T89965324A89965347.en. Retrieved 26 January 2024.
  2. ^ "Quercus sagrana Nutt." Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2023-02-26.
  3. ^ Nuttall, Thomas (1842). The North American sylva, or, a description of the forest trees of the United States, Canada, and Nova Scotia, not described in the work of F. Andrew Michaux. Philadelphia, PA: J. Dobson. p. 17 Archived 2023-02-26 at the Wayback Machine
  4. ^ Turland, N.J.; et al., eds. (2018). "Article 60". International Code of Nomenclature for algae, fungi, and plants (Shenzhen Code) adopted by the Nineteenth International Botanical Congress Shenzhen, China, July 2017 (electronic ed.). Glashütten: International Association for Plant Taxonomy. Archived from the original on 2023-04-02. Retrieved 2023-02-26.
  5. ^ "Quercus sagrana Nutt." International Plant Names Index (IPNI). Royal Botanic Gardens, Kew. Retrieved 2023-02-26.
  6. ^ Richard, Achille (1853). R. de la Sagra (ed.). Fanerogamia ó plantas vasculares. Historia física, política y natural de la Isla de Cuba.
  7. ^ Trelease, William (1924). "The American oaks". Memoirs of the National Academy of Sciences. 20: 1–255.
  8. ^ Muller, Cornelius H. (1961). "The live oaks of the series Virentes". Memoirs of the National Academy of Sciences. 65: 17–39.
  9. ^ Muller, Cornelius H. (1955). "The origin of Quercus on Cuba". Revista de la Sociedad Cubana de Botánica. 7: 41–47.
  10. ^ Gugger, Paul F.; Cavender-Bares, Jeannine (2013). "Molecular and morphological support for a Florida origin of the Cuban oak". Journal of Biogeography. 40 (4): 632–645. doi:10.1111/j.1365-2699.2011.02610.x.
  11. ^ Denk, Thomas; Grimm, Guido W.; Manos, Paul S.; Deng, Min & Hipp, Andrew L. (2017). "Appendix 2.1: An updated infrageneric classification of the oaks" (xls). figshare. Archived from the original on 2023-05-24. Retrieved 2023-02-18.