The monster form is characterized by strong changes in the appearance of the plant, such as the loss of thorns or ribs. In this case Euphorbia obesa shows anomalous deformations and protuberances, which make it assume an asymmetrical and unique shape, never exactly repeatable in another specimen. More commonly known as a "baseball plant" it is a succulent plant which in its normal form is made up of globular bodies, perfectly symmetrical, becoming columnar with growth. It has a stem that can vary from dark green to green-gray, often with lighter streaks and typically slightly protruding ribs without thorns. At the top it generates very small yellow flowers, which give liveliness and pleasantly contrast with the dark shade of the plant.