Annual setulose to strigulose herbs with simple to much-branched stems
Flowers in terminal bracteate cymes
Nutlets subpyriform in outline with ± incurved or almost straight beak, depressed-pyriform in dorsal view with ± bigibbous shoulders in lower half and laterally compressed beak with strong dorsal and ventral keel in upper half, tuberculate-rugose to granular.
Filaments inserted below the middle of the tube; anthers included
Corolla white to blue or purple; throat with 5 longitudinal bands of hairs but with no scales