Polystachya reticulata Stévart & Droissart and P. engongensis Stévart & Droissart, two new species of orchids from Rio Muni and Bioko (Equatorial Guinea), are described and illustrated. Polystachya reticulata differs from others Polystachya section Affines by an entire lip. Polystachya engongensis closey resembles P. ramulosa Lindl. by its lip shape, but differs by its habit.