Coffee alternatives from cotton going clockwise are: cotton seed, chicory (endive) root, acorn, sunflower, and in the center, sweet potato.

Chicory is a French addition to coffee that predates the Civil War. It can be used as a full-on substitute, but more commonly is mixed.

Cotton seeds, acorns, sunflower husks (not shown) and sweet potato can be roasted, dried and used as a substitute when the going gets tough.