We document 137 species of pteridophytes new to the flora of Peru since the publication of the previous flora by Tryon and Stolze, in 1994. Some of these are recently described species (but no new species are described herein), while many are range extensions of known species from adjacent countries; a few are species that have been elevated in status from lesser rank, or species that have a new name, not mentioned by Tryon and Stolze. Most of these additions are the result of new collections, unknown at the time of the previous flora, and most are from montane rain forests and cloud forests, on the eastern slope of the Andes, from Dept. Amazonas to Dept. Cuzco. This area is known to be the richest for ferns, in Peru. These additions bring the known total of pteridophyte species for Peru to about 1200, making it one of the richest countries in the world for ferns and lycophytes.