1. APG II 2003. See general references.
2. Bensel, C.R., Palser, B.F. 1975. Floral anatomy in the Saxifragaceae sensu lato. I. Introduction, Parnassioideae and Brexioideae. Amer. J. Bot. 62:176–185.
3. Cameron, K.M. 2003. See general references.
4. Engler, A. 1930. Brexioideae. In: Engler, A., Prantl, K., Die natürlichen Pflanzenfamilien, ed. 2, 18a. Leipzig: W. Engelmann, pp. 185–187.
5. Erdtman, G. 1952. See general references.