Whereas it may be true that "Opuntia robusta monstrosa is not likely to be found in the United States," as you say in your post, KAMasud lives in Pakistan, so that statement would not apply to his photos.
Hi Bryce. Welcome to ATP.
It's wonderful that you found us and can help put this plant in the correct entry in the database. Do you have other photos of it that we can see?
How can you tell them apart?
