Epithelantha

Epithelantha (button cactus) is a genus of cactus that is native to north-eastern Mexico, and the south-western United States from western Texas to Arizona. There are eight species recognised in the genus Epithelantha. The name Epithelantha refers to the flower position near the apex of the tubercles.^[1]

Epithelantha
Epithelantha micromeris
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Order:	Caryophyllales
Family:	Cactaceae
Subfamily:	Cactoideae
Tribe:	Cacteae
Genus:	Epithelantha F.A.C.Weber ex Britton & Rose
Type species
Epithelantha micromeris

Description

Epithelantha are very small cacti with globe-shaped or cylindrical stems typically up to one inch in diameter, rarely reaching two inches long. Tiny whitish spines completely cover the surface of the stem. The flowers are also tiny, growing from the tip of the stem. Fruits are bright red.^[2]

The fruit of all species is said to be edible.^{[citation needed]}

Species

As of January 2021^[update], Plants of the World Online accepted eight species:^[3]

Image	Scientific name	Distribution
	Epithelantha bokei L.D.Benson	Texas in the United States and Coahuila in Mexico
	Epithelantha cryptica D.Donati & Zanov.	Mexico (Coahuila)
	Epithelantha greggii (Engelm.) Orcutt	Mexico (Coahuila)
	Epithelantha ilariae D.Donati & Zanov.	Mexico (Nuevo León)
	Epithelantha micromeris (Engelm.) F.A.C.Weber ex Britton & Rose	United States in Arizona, New Mexico, and Texas, and in Mexico in the states of Chihuahua, Coahuila, Durango, Nuevo León, San Luis Potosí and Zacatecas[citation needed]
	Epithelantha pachyrhiza (W.T.Marshall) Backeb.	Mexico (Coahuila)
	Epithelantha polycephala Backeb.	Mexico (Coahuila)
	Epithelantha spinosior C.Schmoll	Mexico (Coahuila, Nuevo León)