Description: Opuntia monacantha is a succulent perennial cactus species from the Cactaceae family, originating from South America. This plant is a popular choice for growing as a houseplant, it is low maintenance, requiring good sunlight and infrequent watering. Produces showy flowers up to 10cm in length and between 3-7.5cm, they are borne on fleshy bases, appearing from the stem margins.