5-8cm Gymnocalycium spegazzinii （rootless）

Gymnocalycium spegazzinii is a distinctive and highly collectible cactus known for its sculptural form and striking visual appeal. Native to the rocky slopes of Argentina and Bolivia, this species features a solitary, globular to slightly flattened stem with a blue-green to gray-green epidermis. Its most notable characteristic is the prominent, rounded ribs adorned with bold, curved spines that range from ashy gray to dark brown, creating a dramatic contrast against the stem