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Created page with "{{Taxobox | name = Pelecyphora | image = Pelecyphora_aselliformis.jpg | kingdom = Plantae | family = Cactaceae | subfamily = Cactoideae | tribe = Cacteae | genus = '''Pelecyphora''' | authority = Ehrenberg (1843) | notes = Taxonomy follows Joël Lodé (2015). The genus is considered provisionally correct pending further phylogenetic clarification. }} == Etymology == The name means "bearing axes", referring to the characteristic axe-head shaped tubercles..."
 
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| name = Pelecyphora
| name = Pelecyphora
| image = Pelecyphora_aselliformis.jpg
| image = Pelecyphora_aselliformis.jpg
| kingdom = [[Plantae]]
| image_caption = ''Pelecyphora aselliformis''
| family = [[Cactaceae]]
| kingdom = Plantae
| subfamily = [[Cactoideae]]
| phylum = Tracheophyta
| tribe = [[Cacteae]]
| classis = Magnoliopsida
| genus = '''Pelecyphora'''
| ordo = Caryophyllales
| authority = Ehrenberg (1843)
| familia = Cactaceae
| notes = Taxonomy follows Joël Lodé (2015). The genus is considered provisionally correct pending further phylogenetic clarification.
| subfamilia = Cactoideae
| tribus = Cacteae
| genus = Pelecyphora
| genus_authority = Ehrenb.
}}
}}
'''Pelecyphora''' Ehrenb. is a genus of cacti in the family ''Cactaceae''. Traditionally very small, the genus has been significantly expanded based on recent phylogenetic studies and now includes taxa formerly placed in ''Escobaria'' and related genera.


== Etymology ==
== Etymology ==
The name means "bearing axes", referring to the characteristic axe-head shaped tubercles of the type species.
The name ''Pelecyphora'' means "axe-bearing", referring to the hatchet-shaped tubercles of the type species.


== Description ==
== Description ==
'''Pelecyphora''' is a genus of extremely reduced, geophytic cacti adapted to cryptic life at ground level.
A genus of dwarf to small cacti, solitary or forming clumps, often geophytic or growing at ground level.


* '''Habit''': Dwarf, solitary or clustering, flattened globose plants, often partially buried.
Stems globose to cylindrical, without ribs, composed of spirally arranged tubercles. Roots often spindle-shaped.
* '''Roots''': Spindle-shaped taproot.
* '''Stems''': Not ribbed; composed of spirally arranged tubercles.
* '''Tubercles''': Distinctive, often resembling axe heads (especially in ''P. aselliformis'').
* '''Areoles''': Rudimentary, dimorphic — spines produced on outer parts, flowers from tubercle bases.
* '''Spines''': Numerous and tiny (up to ~60 in ''P. aselliformis''), often pectinate.
* '''Flowers''': Diurnal, funnel- to bell-shaped, pink to magenta (rarely white), appearing near apex.
* '''Fruits''': Dry at maturity, quickly disintegrating.
* '''Seeds''': Small, brown, spoon-shaped (cochleariform), striate.


== Habitat ==
Areoles dimorphic, producing spines and flowers separately. Spines variable, from numerous and pectinate to sparse.
The genus grows almost completely hidden at ground level, often mimicking surrounding stones.


* Substrate: limestone, gravel
Flowers diurnal, self-sterile, funnel-shaped to bell-shaped, usually pink, purple or magenta, sometimes white or yellow.
* Environment: rocky hills, xeric habitats
* Altitude: 1600–2200 m


== Distribution ==
Fruits dry or slightly fleshy, often dehiscent or disintegrating at maturity. Seeds small to relatively large depending on species, brown to black, variously sculptured.
* '''Mexico''': Nuevo León, San Luis Potosí, Tamaulipas


== Taxonomy ==
== Taxonomy ==
The genus ''Pelecyphora'' was established by Ehrenberg (1843).
Recent molecular and morphological studies (Aquino & Sánchez, 2022) support a broad circumscription of ''Pelecyphora'', including the former genus ''Escobaria'' and allied taxa.
 
This expanded concept results in approximately 20 species and multiple subspecies.
 
This treatment is not universally accepted, and some authors continue to recognize ''Escobaria'' as a separate genus.
 
== Synonyms ==
* ''Cochiseia'' W.Earle (1976)
* ''Encephalocarpus'' A.Berger (1929)
* ''Escobaria'' Britton & Rose (1923)
* ''Escobesseya'' Hester (1945)
* ''Neobesseya'' Britton & Rose (1923)
* ''Lepidocoryphantha'' Backeb. (1938)
* ''Escocoryphantha'' Doweld (1999)
* ''Fobea'' Frič ex Boed. (1933)
 
== Species ==
The genus ''Pelecyphora'' currently includes:


Historically, the monotypic genus ''Encephalocarpus'' (''E. strobiliformis'') was merged into ''Pelecyphora'', forming the two-species concept used today.
* ''Pelecyphora abdita''
** ''Pelecyphora abdita'' subsp. ''tenuispina''


Molecular studies (Butterworth & Wallace 2004; Crozier 2005; Bàrcenas et al. 2011) confirm that ''Pelecyphora'' is not closely related to ''Mammillaria'', but belongs within the ''Coryphantha'' clade.
* ''Pelecyphora alversonii''


A more recent phylogenetic study (Vázquez-Sánchez et al. 2013) suggests that ''Pelecyphora'' may form a broader lineage including some species currently placed in ''Escobaria'' (e.g. ''E. laredoi'', ''E. chihuahuensis'').
* ''Pelecyphora aselliformis''


However, this interpretation lacks clear morphological support and may reflect genetic introgression or unresolved lineage divergence.
* ''Pelecyphora chihuahuensis''
** ''Pelecyphora chihuahuensis'' subsp. ''henricksonii''


According to Joël Lodé (2015), the genus is accepted but considered '''provisionally correct''' pending further research.
* ''Pelecyphora cubensis''


== Species ==
* ''Pelecyphora dasyacantha''
Following the classification of Joël Lodé (2015).
** ''Pelecyphora dasyacantha'' subsp. ''chaffeyi''
 
* ''Pelecyphora duncanii''
 
* ''Pelecyphora emskoetteriana''
 
* ''Pelecyphora hesteri''
** ''Pelecyphora hesteri'' subsp. ''grata''
 
* ''Pelecyphora laredoi''
 
* ''Pelecyphora lloydii''
 
* ''Pelecyphora macromeris''
** ''Pelecyphora macromeris'' subsp. ''runyonii''
 
* ''Pelecyphora minima''
 
* ''Pelecyphora missouriensis''
** ''Pelecyphora missouriensis'' subsp. ''asperispina''
 
* ''Pelecyphora robbinsorum''
 
* ''Pelecyphora sneedii''
** ''Pelecyphora sneedii'' subsp. ''orcuttii''
 
* ''Pelecyphora strobiliformis''
 
* ''Pelecyphora tuberculosa''
 
* ''Pelecyphora vivipara''
 
* ''Pelecyphora zilziana''
 
== Habitat ==
Species occur in arid and semi-arid environments, on limestone, sandy or rocky soils, often in grasslands, deserts or scrublands.
 
Some species are highly cold-resistant and adapted to continental climates, while others are restricted to warm desert regions.
 
Altitude range varies widely, from about 400 m up to over 3000 m.
 
== Distribution ==
United States, Mexico, and Cuba.


* [[Pelecyphora aselliformis]]
== Comments ==
* [[Pelecyphora strobiliformis]]
The expanded concept of ''Pelecyphora'' reflects modern phylogenetic understanding and resolves the polyphyly of ''Escobaria''.


== Notes ==
However, due to significant morphological diversity and long-standing taxonomic traditions, this treatment remains debated among specialists.
* ''Pelecyphora'' is one of the most cryptic cactus genera.
* Shows strong morphological specialization for camouflage.
* Its phylogenetic position remains partially unresolved.
* Possible future expansion or restructuring depending on molecular data.


[[Category:Cactaceae]]
== References ==
[[Category:Cactoideae]]
* Aquino, D. & Sánchez, D. (2022). Recircumscription of ''Pelecyphora''. PhytoKeys.
[[Category:Cacteae]]
* Anderson, E.F. (2001). The Cactus Family.
[[Category:Pelecyphora]]
* Hunt, D. et al. (2006). The New Cactus Lexicon.

Revision as of 08:55, 18 April 2026

Pelecyphora
File:Pelecyphora aselliformis.jpg
Kingdom Plantae
Family
Subfamily
Tribe
SubTribe
Genus Pelecyphora
Species
Notes

Pelecyphora Ehrenb. is a genus of cacti in the family Cactaceae. Traditionally very small, the genus has been significantly expanded based on recent phylogenetic studies and now includes taxa formerly placed in Escobaria and related genera.

Etymology

The name Pelecyphora means "axe-bearing", referring to the hatchet-shaped tubercles of the type species.

Description

A genus of dwarf to small cacti, solitary or forming clumps, often geophytic or growing at ground level.

Stems globose to cylindrical, without ribs, composed of spirally arranged tubercles. Roots often spindle-shaped.

Areoles dimorphic, producing spines and flowers separately. Spines variable, from numerous and pectinate to sparse.

Flowers diurnal, self-sterile, funnel-shaped to bell-shaped, usually pink, purple or magenta, sometimes white or yellow.

Fruits dry or slightly fleshy, often dehiscent or disintegrating at maturity. Seeds small to relatively large depending on species, brown to black, variously sculptured.

Taxonomy

Recent molecular and morphological studies (Aquino & Sánchez, 2022) support a broad circumscription of Pelecyphora, including the former genus Escobaria and allied taxa.

This expanded concept results in approximately 20 species and multiple subspecies.

This treatment is not universally accepted, and some authors continue to recognize Escobaria as a separate genus.

Synonyms

  • Cochiseia W.Earle (1976)
  • Encephalocarpus A.Berger (1929)
  • Escobaria Britton & Rose (1923)
  • Escobesseya Hester (1945)
  • Neobesseya Britton & Rose (1923)
  • Lepidocoryphantha Backeb. (1938)
  • Escocoryphantha Doweld (1999)
  • Fobea Frič ex Boed. (1933)

Species

The genus Pelecyphora currently includes:

  • Pelecyphora abdita
    • Pelecyphora abdita subsp. tenuispina
  • Pelecyphora alversonii
  • Pelecyphora aselliformis
  • Pelecyphora chihuahuensis
    • Pelecyphora chihuahuensis subsp. henricksonii
  • Pelecyphora cubensis
  • Pelecyphora dasyacantha
    • Pelecyphora dasyacantha subsp. chaffeyi
  • Pelecyphora duncanii
  • Pelecyphora emskoetteriana
  • Pelecyphora hesteri
    • Pelecyphora hesteri subsp. grata
  • Pelecyphora laredoi
  • Pelecyphora lloydii
  • Pelecyphora macromeris
    • Pelecyphora macromeris subsp. runyonii
  • Pelecyphora minima
  • Pelecyphora missouriensis
    • Pelecyphora missouriensis subsp. asperispina
  • Pelecyphora robbinsorum
  • Pelecyphora sneedii
    • Pelecyphora sneedii subsp. orcuttii
  • Pelecyphora strobiliformis
  • Pelecyphora tuberculosa
  • Pelecyphora vivipara
  • Pelecyphora zilziana

Habitat

Species occur in arid and semi-arid environments, on limestone, sandy or rocky soils, often in grasslands, deserts or scrublands.

Some species are highly cold-resistant and adapted to continental climates, while others are restricted to warm desert regions.

Altitude range varies widely, from about 400 m up to over 3000 m.

Distribution

United States, Mexico, and Cuba.

Comments

The expanded concept of Pelecyphora reflects modern phylogenetic understanding and resolves the polyphyly of Escobaria.

However, due to significant morphological diversity and long-standing taxonomic traditions, this treatment remains debated among specialists.

References

  • Aquino, D. & Sánchez, D. (2022). Recircumscription of Pelecyphora. PhytoKeys.
  • Anderson, E.F. (2001). The Cactus Family.
  • Hunt, D. et al. (2006). The New Cactus Lexicon.
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