Ferocactus diguetii
Ferocactus diguetii on Isla Cerralvo
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Caryophyllales
Family: Cactaceae
Subfamily: Cactoideae
Genus: Ferocactus
Species:
F. diguetii
Binomial name
Ferocactus diguetii
Synonyms

Echinocactus diguetii F.A.C. Weber

Ferocactus diguetii, commonly known as the giant barrel cactus, is the largest species of barrel cactus in the genus Ferocactus. It is an insular species endemic to several of Baja California Sur's southern islands in the Gulf of California. As the superlative giant of the barrel cacti, it reaches heights of up to 4 metres (13 ft) and diameters of 1 metre (3.3 ft) in the wild, a result of island gigantism. The species has red flowers that bloom from March to May. Although restricted in range, this species grows in protected habitat and lacks major threats.[2]

Description

Ferocactus diguetii is the largest barrel cactus in the genus Ferocactus, with massive, solitary, columnar stems reaching up to 4 metres (13 ft) and diameters of 1 metre (3.3 ft). It is usually about 1–2 m (3.3–6.6 ft) tall and 60–80 cm (2.0–2.6 ft) in diameter. It has numerous thin ribs, 25 to 35, and has up to 8 radial spines per areole, with usually no central spines. The spines are yellow or rarely red, and are up to 4 centimetres (1.6 in), with a slight curve.[3][4][5]

The flowers appear from March to May, and are a fiery red to orange in color, measuring 3–4 cm (1.2–1.6 in) in length and diameter. The barrel-shaped fruits reach similar sizes and are lemon yellow with crescent-shaped scales.[3][4][5]

Taxonomy

Echinocactus diguetii was described in 1898 by Frédéric Albert Constantin Weber, who named it in honor of its discoverer, Léon Diguet, a French explorer who was investigating pearl fisheries on Isla Santa Catalina.[6]

In 1922, Nathaniel Lord Britton and Joseph Nelson Rose transferred the species to the genus Ferocactus, creating the current combination, Ferocactus diguetii.[7]

Distribution and habitat

Ferocactus diguetii is endemic to the state of Baja California Sur in Mexico. It is only found on a number of islands in the southern Gulf of California, namely Isla del Carmen, Isla Danzante, Isla Monserrate, Isla Santa Catalina, Isla Santa Cruz, Isla San Diego, and Isla Cerralvo.[2][3][4] Ivan M. Johnston reported the species for Isla Coronados, but it may be extirpated from that locality.[7][4]

Ferocactus diguetii grows at elevations of 10–300 m (33–984 ft).[4] Britton and Rose noted that the species did not seem to have a definite habitat, growing on from mountainsides along large igneous rocks to old shell beaches.[7] The plant grows along with Bursera microphylla and Pachycereus pringlei.

References

  1. ↑ León de la Luz, J.L.; Gómez-Hinostrosa, C.; Hernández, H.M. (2017) [amended version of 2013 assessment]. "Ferocactus diguetii". IUCN Red List of Threatened Species. 2017: e.T151761A121507542. doi:10.2305/IUCN.UK.2017-3.RLTS.T151761A121507542.en. Retrieved 21 November 2023.
  2. 1 2 Rebman, Jon P.; Gibson, Judy; Rich, Karen (15 November 2016). "ANNOTATED CHECKLIST OF THE VASCULAR PLANTS OF BAJA CALIFORNIA, MEXICO" (PDF). Proceedings of the San Diego Society of Natural History. San Diego Natural History Museum. 45: 104 – via San Diego Plant Atlas & San Diego Natural History Museum.
  3. 1 2 3 Rebman, Jon P.; Roberts, Norman C. (2012). Baja California Plant Field Guide. San Diego: Sunbelt Publications. p. 185. ISBN 978-0-916251-18-5.
  4. 1 2 3 4 5 Pilbeam, John; Bowdery, Derek (2005). Ferocactus (1. ed.). Oxford: British Cactus and Succulent Soc. pp. 36–38. ISBN 978-0902099760.
  5. 1 2 Hunt, David; Taylor, Nigel; Charles, Graham, eds. (2006). The New Cactus Lexicon. Milborne Port, UK: dh Books. p. 119. ISBN 9780953813490.
  6. ↑ Weber, F.A.C (1898). "Les Echinocactus de la Basse Californie". Bulletin du Muséum d'histoire naturelle (in French). Paris Impr. nationale 1895-1907. 4.
  7. 1 2 3 Britton, Nathaniel Lord; Rose, Joseph Nelson; Eaton, Mary E.; Wood, Helen Adelaide (1919). "The Cactaceae : descriptions and illustrations of plants of the cactus family". The Cactaceae: descriptions and illustrations of plants of the cactus family. Washington: Carnegie Institution of Washington. 3: 131. doi:10.5962/bhl.title.46288 – via Biodiversity Heritage Library.
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