Fr. Keefe was an avid botanist, and pressed thousands of plant specimens that he collected. These preserved specimens can still be found in the St. Norbert College Herbarium.
Part of being a botanist includes collecting and pressing plant specimens. This is a Mexican Purple Heart, Setcreasea purpurea, that Fr. Keefe collected.
This is another Purple Heart, Setcreasea purpurea, that Fr. Keefe collected and pressed. It's important to collect several specimens of the same species in order to have many different examples for research.