My first impression as I scrolled down to this picture was of the crucifixion, with the upper flower being Christ's thorn-crowned head hanging down.
That's why I love abstraction. The visual forms work on so many different levels.
I don't know how traditionally religious O'Keeffe was, but who knows what lurks at our subconscious. I certainly feel a spiritual power in all these artists' works, but it is not one linked to traditional religion. It is one that raises our spirits and connect us to the spirit in nature.