Basionym:— Tremacron aurantiacum Pan (1988a: 431).
Distribution:— China (Sichuan, Guizhou).
Notes:—The new name honours the Chinese botanist Pan Kai-Yu. Her many papers on Chinese Gesneriaceae included revisions of Oreocharis (Pan 1987), Isometrum (Pan 1986) and Tremacron (Pan 1988a). The type variety is found only in Sichuan.