Coryphantha echinus

Coryphantha echinus is a species of cactus known by the common names of sea urchin cactus, hedgehog Cory cactus^[2] or rhinoceros cactus.^[3] C. echinus is found in the south and east portion of the Trans-Pecos to Del Rio, Chihuahua, Coahuila and sporadically in the northeast Trans-Pecos.^[2] The plant normally occurs in solitary groupings, but sometimes grows as a clump.^[4] It produces short-lived yellow flowers that last for a couple of hours between April and July.^[4][2] After flowering, it produces green fruits.^[2]

Coryphantha echinus
Conservation status
Least Concern  (IUCN 3.1)
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Order:	Caryophyllales
Family:	Cactaceae
Subfamily:	Cactoideae
Genus:	Coryphantha
Species:	C. echinus
Binomial name
Coryphantha echinus (Engelm.) Britton & Rose[1]
Synonyms
Mammillaria echinus Engelm.

Coryphantha echinus was first collected by Charles Wright in 1849 and was later described as Mammillaria echinus by George Engelmann.^[2]