Ferocactus

Ferocactus
File:Ferocactus glaucescens.jpg
Kingdom	Plantae
Family	Cactaceae
Subfamily	Cactoideae
Tribe	Cacteae
SubTribe
Genus	Ferocactus
Species
Notes	Taxonomy follows Joël Lodé (2015). Lodé treats the genus as provisionally correct while noting its polyphyletic nature[cite: 1032, 1033].

Etymology

The name is derived from the Latin ferox (fierce), referring to the formidable and robust spines characteristic of the genus[cite: 1032].

Description

Ferocactus includes mostly massive, globose to barrel-shaped cacti that can become elongated or cylindrical with age[cite: 1032].

• Stems: Feature well-defined ribs and a depressed apex[cite: 1032]. Areoles often possess nectariferous glands[cite: 1032].
• Spines: Radial and central spines are well-differentiated[cite: 1032]. Centrals are typically very strong, sometimes hooked or ringed[cite: 1032].
• Flowers: Diurnal and self-sterile, appearing around the apex[cite: 1032]. Colors include yellow, orange, red, magenta, and purple[cite: 1032].
• Fruits: Globose to elongated with thick walls[cite: 1032]. They can be dry or juicy at maturity, depending on the section[cite: 1032].
• Seeds: Variable in size, dark brown to black, with surface textures ranging from smooth and shiny to matt and reticulate[cite: 1032].

Habitat

Widespread in arid regions, growing on limestone, volcanic, or granitic soils[cite: 1034]. They are found on slopes, in canyons, and on coastal plains from sea level up to 3000 m[cite: 1034].

Distribution

• Mexico and USA: Extending from the southwestern United States through northern and central Mexico, including the islands of the Gulf of California[cite: 1034].

Species

Following Lodé (2015), the genus includes the following recognized species and subspecies[cite: 1033, 1034]:

• Ferocactus acanthodes (syn. F. cylindraceus) [cite: 1033]
  • Ferocactus acanthodes subsp. eastwoodiae [cite: 1033]
• Ferocactus alamosanus [cite: 1033]
  • Ferocactus alamosanus subsp. reppenhagenii [cite: 1033]
• Ferocactus chrysacanthus [cite: 1033]
  • Ferocactus chrysacanthus subsp. grandiflorus [cite: 1033]
• Ferocactus diguetii [cite: 1033]
• Ferocactus echidne [cite: 1033]
• Ferocactus emoryi [cite: 1033]
  • Ferocactus emoryi subsp. rectispinus [cite: 1033]
• Ferocactus flavovirens [cite: 1034]
• Ferocactus fordii [cite: 1034]
  • Ferocactus fordii subsp. borealis [cite: 1034]
• Ferocactus glaucescens [cite: 1034]
• Ferocactus gracilis [cite: 1034]
  • Ferocactus gracilis subsp. coloratus [cite: 1034]
  • Ferocactus gracilis subsp. gatesii [cite: 1034]
  • Ferocactus gracilis subsp. tortulispinus [cite: 1034]
• Ferocactus haematacanthus [cite: 1034]
• Ferocactus herrerae [cite: 1034]
• Ferocactus histrix [cite: 1034]
• Ferocactus johnstonianus [cite: 1034]
• Ferocactus latispinus [cite: 1034]
  • Ferocactus latispinus subsp. greenwoodii [cite: 1034]
  • Ferocactus latispinus subsp. spiralis [cite: 1034]
• Ferocactus lindsayi [cite: 1034]
• Ferocactus macrodiscus [cite: 1034]
• Ferocactus peninsulae [cite: 1034]
• Ferocactus pilosus [cite: 1034]
• Ferocactus pottsii [cite: 1034]
• Ferocactus robustus [cite: 1034]
• Ferocactus santa-maria [cite: 1034]
• Ferocactus schwarzii [cite: 1034]
• Ferocactus townsendianus [cite: 1034]
• Ferocactus viridescens [cite: 1034]
  • Ferocactus viridescens subsp. littoralis [cite: 1034]
• Ferocactus wislizenii [cite: 1034]
  • Ferocactus wislizenii subsp. ajoensis [cite: 1034]
  • Ferocactus wislizenii subsp. tiburonensis [cite: 1034]

Taxonomy Note

Lodé divides the genus into two artificial sections: Bisnaga (juicy fruits, small seeds) and Ferocactus (dry fruits, larger seeds)[cite: 1033]. Recent molecular work (Vázquez-Sánchez et al., 2013) suggests that Ferocactus is part of a complex clade including Thelocactus and Leuchtenbergia, necessitating future revisions[cite: 1033].