If you know what this is you know how hard these are to find, in addition to their size. They are called Euphorbia polygona snowflake, a slow growing succulent Native to South Africa, forms a ribbed chunky columnar plant of glaucous grey-green and is heavily armed with spiny protuberances ("peduncles", otherwise known as persistent flower stalks). The cultivar 'Snowflake' is chalky white and has fewer spiny protuberances. Produces deep purple flowers. It has been said that only a single 'Snowflake' was ever found in Africa. Many new hybrids have been created using 'Snowflake' as it tends to pass on excellent genetics for attractive plants. Wear Gloves handling this Cactus. All Euphorbias contain a white sap that can be irritating to eyes and mucous membranes. If contact is made with this white sap, take care to not touch face or eyes before washing hands with soap and water. Responds well to warmth, with its active growth period in the late spring and summer months. Porous soil with adequate drainage. Requires bright light for best appearance, and should be given a winter resting period at which time less water should be given. Price: Large Pot with many pups: 40$ medium pot: 25$ small pot: 15$ last 2 pictures are of the mother plant. and very last pic is what the sell for. Open to trades. Happy Gardening! Please let me know if you have any questions.