The bryophytes of Carlsbad Caverns National Park were collected and inventoried. A total of 41 bryophyte species were found including 38 moss species in eight families, and three liverwort species in two families. No hornworts were found. The liverwort Riccia atromarginata Levier is reported new for New Mexico. We provide the first photographs of Mannia paradoxa Schuster, collected by Schuster at the park in 1982. Since water is a limiting factor for life in much of the park, we initially assumed that the many natural springs in the area would provide the most diverse habitats. In fact, the seasonally flooded arroyos and north-facing limestone cliffs together proved to have more bryophyte diversity than the springs. A brief biography of Gilford J. Ikenberry is included.