Tephrocactus articulatus v. papyracanthus
Native range: Western Argentina
Known names: Pine Cone Cactus, Spruce Cone Cactus
Hardiness: Can take down to 20°F if kept dry in winter.
Mature Size: Grows to ~15" inches tall.
Light: Bright direct sun, Full Sun
Water: Water during summer (let soil dry out completely), keep pretty dry during winter.
Soil: Cactus/Succulent mix
Dormancy Period: Winter
Pet-Safe: No
Plant Size: Grown in 2" pot
 
This Tephrocactus looks like a grey, powdery spruce cone with long, flat spines!  New growth produces sharp spines and glochids but will fall off with age. Produces pads that falls off fairly easily but can also root fairly easily.