This genus is often considered as a part of the Euphorbia genus, due to many common characteristics, including the milky and irritating sap, that can be seen in between its layers. This plant grows in various extremely arid areas of Africa, thus it has brilliantly adapted to different environments, generating very different species: some of them fall in wonderful green waterfalls, some are arboreal, similar to palm trees, others are tuberculate and bushy, ranging in height: from a few tens of centimeters to several meters. Almost all species have inflorescences of a particular horseshoe shape in various colors. It is a very resistant succulent, of a bright green color that, when exposed to the direct sun, tends to take on extraordinary reddish shades, making each plant unique in its kind! Here are some tips for its cultivation: It likes bright places, however avoid direct sunlight during the hottest hours of the day. It prefers environments with low humidity. Keep it at mild temperatures and never below 15 °C, for this reason it is recommended to shelter it during the winter period. Water moderately but only when the soil is completely dry. It is enough to water the plant once a week in spring and summer and suspend watering completely in winter. A well-draining soil is an optimal solution, even better if further enriched with 50% or more of inert materials such as pumice, sand or lapilli. They do not need frequent fertilization, it is sufficient to dilute the fertilizer with watering once a year.