Oh, that's just lovely.
Flammarion seems to have been influenced by Henri Rousseau; that's very reminiscent of his Jungle Sunset.
@Ray: Thanks for the link. I thought the style of the plant life looked familiar, but couldn't remember where I'd seen something like it before.
It's very familiar to me, as a few years ago I helped Clare (Mrs Girvan) to paint a Rousseau-themed backdrop for her production of The Admirable Crichton (see here, and image detail).