3-4cm mammillaria polythele（single head）

Mammillaria polythele is a distinctive and architectural cactus species valued for its unique columnar form and minimal spination. Native to Mexico, this cactus grows as a series of cylindrical stems that may remain solitary or slowly form small clusters over time. Its most notable feature is the arrangement of its prominent, nipple-like tubercles (which give the plant its name "polythele" meaning "many nipples") along the stem's ribs.