Tephrocactus articulatus is a species of cactus in the subfamily Opuntioideae native to Argentina. They usually grow branches up to one foot tall with white flowers. Stem segments, known as cladodes, easily break away and will root without special treatment. This species is very variable as to whether it is spine-bearing or not. The spiny form "papyracanthus" have broad, raffia-like spines which are not spines but thin ribbon like processes, and vary in their color, markings, and length.