Man and nature: the two are kind of welded into one when it comes to our pumpkin-speaker in "Theme in Yellow." The man is the natural, autumnal world in "Theme in Yellow," so we get the extra bonus of hearing about nature straight from the source. Of course, we know that we're in Poetry Land, where things aren't always literal, but it's still cool to hear man talking about nature while imagining himself as a pumpkin.
When man becomes pumpkin, the natural world suddenly looks a whole lot more human. Trippy.
Even though the pumpkin's the star of the show, we can't help but see it as a man also, which makes the natural world less natural. Bummer.