Cyperus eragrostis	Cyperus esculentus	Cyperus rotundus	Bolboschoenus maritimus
roots rhizomatous, no tubers	tubers round, at the end of rhizomes	tubers flat, interconnected, dark-coloured	tubers round, interconnected
inflorescence, glumes whitish to golden-brown	inflorescence, glumes yellowish to golden	inflorescence, glumes red to purplish brown	inflorescence, glumes bright orange-brown to stramineous
habit	habit	habit	habit