Erect annual or rarely perennial, sparsely pubescent to glabrous, branched herbs. Leaves alternate, sagittate-triangular, delotoid, hastately deltoid or cordate; ochreae short, truncate, entire. Inflorescence terminal or axillary, racemose or paniculate cyme. Flowers pedicellate, bisexual. Perianth segments 5-partite, subequal, not accrescent in fruit. Stamens 8, alternating with glandular disk lobes. Ovary 3-angled; styles 3, recurved, heterostyled; stigmas 3, capitate. Nuts 3-angled, much longer than the perianth. Seeds with axial embryo, very broad, transversely folded.