Perennials, caespitose or with creeping rhizomes or stolons. Leaves with obtuse, sometimes swollen, usually mucronate tip; cauline leaves usually distinctly smaller than the basal ones. Lower bract short, leaf-like. Inflorescence simple or sparsely (rarely more densely) branched, ±umbelloid (corymbose); flowers borne singly. Seeds with apical (distal) appendages mostly 0.3–1.7 mm long; seed base not fibrillate. Endodermis cells U-shaped in T.S. Agmatoploids only.