The productivity of the C4 grass Echinochloa polystachya on the Amazon floodplain The productivity of the C4 grass Echinochloa polystachya on the Amazon floodplain May 14, 2015 AmazCitSci Publication link: http://www.jstor.org/stable/1941118?seq=1#page_scan_tab_contents Publication Year: 1991 Publication Author: Piedade, M. T. F., W. J. Junk, and S. P. Long Publication Magazine: Ecology Newer A floodplain grassland of the central Amazon Older Aquatic herbaceous plants of the Amazon floodplains: State of the art and research needed