Opuntia sp. 'Old Mexico' appears to be a spineless selection of Opuntia gomei, a native just barely to the southernmost coast of Texas and more abundantly down into Tamaulipas. The cultivar name comes from Helen Wynans, a cactus dealer in Brownsville in the 1970's and 80's. This spineless form is very tolerant of heat and sun, but will also grow well in partial shade. The pads have an undulating, way edge that is quite attractive. Yellow blooms are produced in the late spring and early summer. This plant will perform well in the ground or also in containers, and should be cold hardy to about 10° F. USDA Zone 8.