TY - JOUR T1 - Origin and structure of the Kranz tissue in bracts of Cyperus giganteus Vahl (Cyperaceae) JO - Brazilian Journal of Botany A1 - Rodrigues, Ana Claudia A1 - Estelita, Maria Emília Maranhão SN - 0100-8404 UL - 10.1590/S0100-84042003000400003 VL - 26 Y1 - 2003 PB - Brasil ER -