Gymnocalycium gibbosum f. mostruosa

The monstrous form of this cactacea presents geometric anomalies, for example sometimes asymmetrical protuberances or the absence of thorns, different for each individual specimen, so as to make each of them absolutely unique and therefore extremely sought after by collectors. In its normal form it is a small cactacea with a globular shape, slow growing and depressed at the top, which has well-defined ribs which color can vary between olive green and opaque dark gray. It has straight yellowish-white spines, of variable length and which sometimes tend to curve upwards. At the top of the stem, wonderful funnel-shaped inflorescences bloom, quite large and of a white color, so shiny that they look like silk.