Thanks Lynn, I am a member but forgot about the site.
Robusta is round while Tee is correct, mine is not.
All Opuntia seem to have yellow flowers?
Opuntia anacantha.
Opuntia bravoana.
Opuntia caracassana .
Opuntia chisosensis.
Opuntia dillenii .
Opuntia ficus-indica.
Now all can check the above Opuntias and take a vote please and yes its not a monstrose, agreed Tee.
Regards,
Masud.