What can one say about such a flower? That it looks vaguely like some sort of genitalia. That the artist is demented. That it's plant porn. That it should be displayed in an exhibit so someone can say, "this is crap, I could draw that."
When the elderly frame shop woman asked, I said, simply, "It's a flower."
"Some sort of sea flower?" she asked.
"Yep," I told her.