👉 Systellonotus is a type of plant in the family Cactaceae that grows on rocks and other hard surfaces. It has a distinctive, cylindrical shape and can grow up to 60 cm tall. Its leaves are usually flat or oblong, with serrated edges and small spines. Systellonotus flowers produce small white to pinkish-red flowers in spring and summer, while its fruit is often used as a food source by birds and other animals.