We describe two new species from Peru, Ceradenia tryonorum and Terpsichore youngii (Grammitidaceae). Ceradenia tryonorum is a member of subg. Ceradenia and is unusual in having hydathodes. Terpsichore youngii belongs to the T. taxifolia group. Three new combinations are made: Melpomene youngii, Terpsichore anfractuosa, and T. subscabra. We provide a key for the nine species of the T. taxifolia group in Peru.