This is a plant in the fog desert section of a botanical garden. Does anyone have suggestions regarding the family, genus or species?

Do you have detailed pictures of the flowers, showing closed image of petals, stamens and other floral parts.?
I get vibe of Solanaceae of it.
There are many spiny Solanum sp, and because it is in a botanical garden, it could very well be an uncommon one.

@skopjecollection:
I don't think so. Brasiliopuntia brasilensis is a genus in the cactus family, but the plant in my photo isn't a cactus, it's a thorny bush.

@tofitropic:
Here's an enlargement from another photo. The detail quality is poor, but it's the best I've got.

Definitely looked that way on first glance...

@tom65719 Thanks for the larger image, the petals seems sympetallous common in Solanaceae, but the tips are notched and divided, that is not common (I never know any Solanaceae with that traits,... but my knowledge is way limited). The stamen seems free, most Solanaceae will have connivent anthers, but this one seems free.
in this case I am sorry I will retract mt former oppinion, it might be something else, not a solanaceae perhaps. I wish other member will have their opinion. in the future if you visit that place again I wish you can also get a pictute of fruit... it is interesting indeed

@tofitropic:
Thank you for your statement. If the plant house where the bush is located reopens, I will try to take better pictures and find out more about the plant. Sometimes you can catch a gardener on the spot ...