Remarks: The yellow appearance of this Echinofossulocactus is more
precisely caused by another aberration called "schizochromism".
Here, though, the specific green pigment (chlorophyll)
is missing: every other pigment is present at normal levels, the
dominant green colouration is lost, but will still more than likely have
normal other pigments that give the yellow overall appearance of stems
and the red colouration of