Coryphantha elephantidens ssp. greenwoodii
While C. elephantidens has a fairly large habitat range, this subspecies has a very small restricted range near Piedras Blancas, Veracruz, Mexico. Dark green tuberculate body with dark brown spines, will slowly offset to form a cluster. This plant grows best in filtered sun. Water the plant during its growing season, but keep dry during dormancy. The flower is yellow.