1. Baldwin, J. T. and Speese, B. M. 1949. Cytogeography of Saururus cernuus. Bull. Torrey Bot. Club 76: 213-216.
2. Chuang, T. I., Chao, Y. C., Hu, W. W. L. and Kwan, S. C. 1963. Chromosome numbers of the vascular plants of Taiwan. I. Taiwaniana 1: 51-66.
3. Ge, C. J., Li, Y. K., Wan, P. and Hsu, P. S. 1989. Chromosome numbers of 31 medicinal plants from Shandong Province. In: Plant Chromosome Research (1987) (Hong, D., ed.). Organizing Committee Sino-Japanese Symposium on Plant Chromosome, Beijing, pp. 267-272.
4. Hsu, C. C. 1968. Preliminary chromosome studies on the vascular plants of Taiwan (II). Taiwaniana 14: 11-27.
5. Kurosaw, S. 1966. Cytological studies on some Eastern Himalayan plants, pp. 658-670. In: H. Hara ed., The flora of Eastern Himalaya. Univ. Tokyo Press.