KUBITZKI, K. (ed.); BAYER, C. (ed.). The families and genera of vascular plants. Vol. 6. Berlin: Springer, 2004. Dostupné online. ISBN3-540-06512-1. (anglicky)
BERRY, P.E. et al. Flora of the Venezuelan Guayana (vol. IV). Missouri: Timber Press, 1998. Dostupné online. ISBN0-915279-52-5. (anglicky)