Several of the Gymnocalycium cacti in our collection are now in seed, but the most spectacular must be this Gymnocalycium saglione. The cactus has a diameter of about 12 cm. and a height of 7 cm. maximum, yet it is carrying 10 very large seed pods of a magnificent magenta colour. The largest pods are 3.5 cm in diameter and I don't think they have stopped growing yet!
See more Gymnocalycium seed pods at this Picasa album.