[2] Gymnocalycium uruguayense forms groups with juicy, green to blue-green bulbous body which is low to the ground, flattened, spherical shoots that are either flush with the ground or protrude 3 to 4 centimeters.

The plant features six to ten (rarely up to 14) ribs divided into hexagonal humps with noticeable chin-like projections.

[3] Gymnocalycium uruguayense is found in Brazil (Rio Grande do Sul) and Uruguay.

[4] First described as Echinocactus uruguayensis by José Arechavaleta in 1905, the species name refers to its distribution in Uruguay.

[5] In 1922, Nathaniel Lord Britton and Joseph Nelson Rose reclassified it under the genus Gymnocalycium.