Moon Cacti are not a genus. it’s the result of a cactus graft, an
actual physical union of the vascular systems of the two plants.
Their
colored top is not normal—this color occurs because the cactus does not
produce chlorophyll. Thus this living arrangement is absolutely
necessary because the top cannot survive without chlorophyll and the
bottom supplies it.

Wishing You All a very, very “Merry Christmas”,
specially the “Happy Cactus Monday” group…

“Ruby Moon” (original in process – not finished) • watercolor, wax on ricepaper

Red is not the only “achlorophyllous” color that occurs; in fact there are
many beautiful genera which are yellow, pink, orange, or even multicolored.
This Moon Cacti is a great windowsill culture but please keep out of direct sunlight
because the sun would fade out the color and also it is easily sunburned!

There’s part of the sun in an apple; There’s part of the moon in a rose;
There’s part of the flaming Pleiades
In every leaf that grows.