William Blake said it pretty well: “The tree which moves some to tears of joy is in the eyes of others only a green thing that stands in the way. Some see Nature all ridicule and deformity, and some scarce see Nature at all. But to the eyes of the man of imagination, Nature is Imagination itself.”

To the eyes of the man of imagination, sure. But also to the lens of Barbara Bosworth’s tripod-mounted large-format camera. The two decades of Bosworth’s photography that comprise Earth and Sky, on view at the Smithsonian American Art Museum through early November, concerns itself predominantly (albeit not exclusively) with trees.