Coryphantha retusa
The genus Coryphantha is related to Escobaria and to Mammillaria, and the various species are generally found in northern and eastern Mexico, as well as to the north in the southwestern United States. Coryphantha retusa comes from the Mexican states of Puebla and Oaxaca, to the southeast of Mexico City. Like other species in the genus, it has a wonderful network of interlacing spines. Its yellow flowers come in late summer to fall.
-Brian










