Tylecodon

 Tylecodon is a genus of unique, often caudiciform (swollen base) succulents from Southern Africa, known for their winter growth, summer dormancy (losing leaves), knobbly stems, and distinctive tubular flowers, with species like T. wallichii (gray-green leaves) and T. schaeferianus (fairy tale plant) popular for bonsai due to their interesting textures and shapes, but all species are potentially toxic to livestock and humans, causing krimpsiekte (contraction disease)