Fontanesia longicarpa K.-J. Kim is newly described from China. This distinctive species is known only from the Zhejiang province and differs from other species in the genus by the size and shape of its fruit. As currently circumscribed, the genus now consists of three taxa; F. longicarpa, F. philliraeoides Labill. var. philliraeoides and F. philliraeoides var. fortunei (Carr.) Koehne. A revisionary study of the genus is provided, including a key and pertinent synonymy.