Uebelmannia

Uebelmannia is genus of cacti, native to southeast Brazil. In a 2023 classification of the tribe Cereeae, it was placed as the only genus in the subtribe Uebelmanniinae, having formerly been placed in the subtribe Rebutiinae.

==Description== Plants in the genus Uebelmannia, individual plants grow without branching and form spherical to cylindrical shoots that can reach heights of up to . The plant's surface can be smooth, papillate, granular, or covered with waxy deposits. Most plants have sharp-edged ribs, although some may have ribs that are divided into bumps. Each plant has two to seven spines that emerge from the areoles, which are arranged in a protruding, spreading, or comb-like pattern. These spines can be straight or slightly curved.