Spore Print Card distills the reference cards of mid-century North American mycologists — radial gill-pattern deposits in rust-brown, white, and purple-black, dropped onto contrasting paper to key genus, then mounted on near-black board.

The dark mounting ground is documented practice: white prints need a dark surface and dark prints a light one, so all three deposit colors read at once. The result is sober, monochromatic, data-forward — earthy rust on matte board, never bright, never playful.