For Megathyrsus
Wipff, J.K., and R.A. Thompson. 2003b. Urochloa. In Flora of North America Editorial Committee. 2003a. Flora of North America north of Mexico. Volume 25, Magnoliophyta: Commelinidae (in part): Poaceae, part 2. Oxford Univ. Press, New York, NY. 783 pp.
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