It might be Eustoma, aka Lisianthus, based on the flower, bud and bit of leaf visible.

A second possibility is Escholtzia, Californian poppy, but the leaf is wrong.

The third possibility is that it is a figment of the artist's imagination and not intended to represent a real plant.

Another possibility is Godetia. I agree with Flora that it could well be a figment of imagination.

If you could tell us why you want to search for it, perhaps we could be of more help. No request is strange on this forum! ;o)

Calochortus.

Yes, bboy, that's a good possibility. Do you think it looks as if it has 3 petals?

I think it looks as if it's a Calochortus. Note same petal shape and markings, appearance of stamens.