(Question)
My mother had this cactus and would like to identify what the name of this cactus is ?
(Answer)
Thank you for the opportunity to help you identify the beautifully grown cactus in your image. There are a variety of genus of trailing succulents, such as Huernia or Disocactus, each having several cultivars and crosses. While it is not possible to give you a specific name, from your image, it appears to be a species of the genus Huernia, possibly the cultivar ‘Red Dragon’. If or when your plant blooms, you may use this observation to enable you to establish a more specific identification of your plant.
Continue to enjoy your lovely cactus.