Seventeen new species of Freycinetia Gaudich. are described from groups of islands of New Guinea: Freycinetia admiraltiensis, F. amoena, F. formosula, F. granulata, F. lanceolata, F. nakanaiensis, F. novobritannica (Bismarck Archipelago), F. relegata, F. rossellana (Louisiade Archipelago), F. angusta, F. awaiarensis, F. boluboluensis, F. fergussonensis, F. goodenoughensis, F. lenifolia, F. normanbyensis (D’Entrecasteaux Islands), and F. woodlarkensis (Woodlark Island). Specific characters from both gross morphology and anatomy of fruits, seeds, and leaf auricles are used for the description.