The keys to the genera of Gesneriaceae, and to the species within each genus, prepared for Flora Reipublicae Popularis Sinicae are here presented in English translation. The keys are prefaced by a discussion on the phytogeography of Gesneriaceae within China and a note on the recognition of the evolutionary tendencies that underlie the revision; both are by Wang Wentsai. The keys have been translated by Professor Wang and edited, with a few supplementary notes and references, by B. L. Burtt, who also contributes an Introduction.