“…L, 1 -1.6mm W achene: 0.5-0.6(-0.7) × 0.3-0.4(-0.5) mm small Fruit in summer, Flwr summer and early fall 21 -27, min >-14°m oderate to high to very high high tolerance 4.5 -6.5 -7.5 nutrient rich M Cook, 1974;FONA, 1993;Beck, 2005;USFS,PIER, 2007;Efloras, 2008a;Liveaquaria.com, 2011 Cyperus helferi perennials emergent, can be submerged (amphibious) Cook, 1974;Beck, 2005;FAO, 2007;Efloras, 2008b;PFAF, 2010 Cook, 1974;Purdue, 1988;FONA, 1993;Archer, 2004 Cook, 1974;Thierry & Piednor, 2005;Winterton & Scher, 2007;The Planted Tank, 2008;APC, 2009;Diszhalak, 2009 Bos, 1984;Bos, 1992;USFS,PIER, 2007;Dave's Garden, 2011;Sagebud, 2011;USDA, NRCS, 2011 Crowder et al ., 1990;Franco, 2000;Schnell, 2002;Willis & Shaw, 1919 Fassett, 1955;Riehl & Baensch, 1993;Aquapage.eu, 2010 Echinodorus bleherae (syn. Fassett, 1955;Rataj, 1968;Rataj, 1970;Cook, 1974;Hargreaves, 2006;.…”