"Mary Fisher" wrote after
"Bob Hobden" asked

Could you post your pics to alt.binaries. pictures.gardens Mary please.

Done.

Mary, that is a perfect picture of a monstrous growth, it's something that
happens to plants when the growing tip is damaged and it flattens out into a
line instead of a point. You often see Cacti grown like that deliberately,
making a sort of crest.
It may be a chemical you have used or some other reason so I would suggest
you repot when it's dormant be careful what you use on it next season and
see what happens next year.

--
Regards
Bob Hobden