prostrate to sub-erect herbs, rooting at nodes. Leaves simple, petiolate, blade
ovate to orbicular, reniform, crenate to serrate, stipules ciliate to scarious.
Inflorecence a simple umbel, pedunculate, involucral bracts obsolete or none.
Flowers mostly sessile, sometimes pedicellate. Sepals minute or absent. Petals
present, entire, acute. Stamens usually 5. Ovary with short styles, stylopodium
conic to depressed. Schizocarps orbicular to ellipsoid, laterally compressed,
vittae absent, mericarp with 3-5 ribs.