Gratiola L.

Fertile stamens 2, staminodes 2 or absent Gratiola
Flowers on peduncles more than 10 mm long. Staminodes absent. Leaves lanceolate to elliptic, up to 10 mm wide, dentate. Sepals ± glandular pubescent. Widespread. Wet places. Fl. spring–summer. Gratiola pedunculata
Flowers on short peduncles less than 5 mm long. Staminodes present