Homalocephala (plant)

Homalocephala
Homalocephala polycephala
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Order:	Caryophyllales
Family:	Cactaceae
Subfamily:	Cactoideae
Tribe:	Cacteae
Genus:	Homalocephala Link & Otto [1]
Type species
Homalocephala texensis
Species
See text

Homalocephala is a genus of plants native to Mexico and the United States. ^[2] In the past, all three species have been considered to be in the genus Echinocactus . ^[3]

Species

As of June 2025 ^[update] , Plants of the World Online accepts three species:

Image	Scientific name	Common Name	Distribution
	Homalocephala parryi (Engelm.) Vargas & Bárcenas syn. Echinocactus parryi	Devil's cushion	Mexico
	Homalocephala polycephala (Engelm. & J.M.Bigelow) Vargas & Bárcenas syn. Echinocactus polycephalus	Cotton top cactus	S. California, S. Nevada, Arizona, Mexico
	Homalocephala texensis (Hopffer) Britton & Rose syn. Echinocactus texensis	Horse crippler cactus	SW. Oklahoma to NE. Mexico

References

1. "Genus: Echinocactus Link & Otto". Germplasm Resources Information Network. United States Department of Agriculture. 2004-02-13. Archived from the original on 2012-10-09. Retrieved 2010-11-13.
2. "Homalocephala Britton & Rose | Plants of the World Online | Kew Science". Plants of the World Online. Retrieved 2025-06-07.
3. Vargas-Luna, Mario Daniel; Hernández-Ledesma, Patricia; Majure, Lucas Charles; Puente-Martínez, Raúl; Macías, Héctor Manuel Hernández; Luna, Rolando Tenoch Bárcenas (2018-11-13). "Splitting Echinocactus: morphological and molecular evidence support the recognition of Homalocephala as a distinct genus in the Cacteae". PhytoKeys (111): 31–59. Bibcode:2018PhytK.111...31V. doi: 10.3897/phytokeys.111.26856 . ISSN   1314-2003. PMC   6246732 . PMID   30483031.

• Innes C, Wall B (1995). Cacti, Succulents and Bromeliads. Cassell & The Royal Horticultural Society.

External links

• Jepson Manual Treatment: Echinocactus
• Cactus-mall.com: "Lost Peyotls"