KOKUBUGATA, G., and C.-I. PENG. “FLORAL MORPHOLOGY AND RECOGNITION OF VARIETIES IN CONANDRON RAMONDIOIDES (GESNERIACEAE) FROM JAPAN AND TAIWAN”. Edinburgh Journal of Botany, vol. 61, no. 1, Jan. 2005, pp. 21-30, https://doi.org/10.1017/S0960428604000034.