F. O.  Zuloaga, Ellis, R. P., and Morrone, O., ?A revision of Panicum subgenus Phanopyrum section Laxa (Poaceae: Panicoideae: Paniceae)?, Annals of the Missouri Botanical Garden, vol. 79, pp. 770-818, 1992.

T. R.  Soderstrom and Ellis, R. P., ?The position of bamboo genera and allies in a system of grass classification?, in Grass sytematics and evolution, T. R.  Soderstrom and al, et, Eds. Washington DC.: Smithsonian Institution Press, 1987, pp. 225-238.

T. R.  Soderstrom and Ellis, R. P., ?The woody bamboos (Poacaeae: Bambusese) of Sri Lanka: a morphological-anatomical study?, Smithsonian Contributions to Botany, vol. 72, pp. 1-74, 1988.

R. P.  Ellis, ?A review of comparative leaf blade anatomy in the systematics of the Poaceae: The past twenty five years?, in Grass Systematics and Evoution, T. R.  Soderstrom, Hilu, K. W., Campbell, C. S., and Barkworth, M. E., Eds. Washington DC: Smithsonian Instution Press, 1987, pp. 4-10.

R. P.  Ellis, ?Leaf anatomy and systematics of Panicum (Poaceae:Panicoideae)in Southern Africa?, Monographs of Systematic Botany of the Missouri Botanical Garden, vol. 25, pp. 129-156, 1988.

L. G.  Clark, Davidse, G., and Ellis, R. P., ?Natural hybridization in bamboos: evidence from Chusquea sect. Swallenochloa (Poaceae:Bambusoideae)?, National Geographic Research, vol. 5, pp. 459-476, 1989.