The Red Grafted Cactus (Moon Cactus) has a permanent bright red colourtop which is often mistaken for a flower, the colourful top is actually a different plant to the green ‘stalk’ which have been carefully grafted and are now growing as one.
The genetic mutation in Gymnocalycium (the top cactus) exposes the bright colours, but the plant lacks chlorophyll which is essential in photosynthesis. Because of this, it cannot survive for long on its own. The problem can, however, be solved by grafting (cutting and attaching) Gymnocalycium on to another cactus that will provide the chlorophyll.
The grafted cactus or moon cactus is very slow growing and is a happy houseplant, provided it is placed in a bright spot