Gratiola

1. Leaves with conspicuous dark glandular dots on both surfaces; corolla bright yellow; capsule at most scarcely 3 mm long.

G. aurea

1. Leaves with glandular dots obscure or none; corolla yellowish, cream, or white; capsules 3–7 mm long.

2. Pedicels at maturity at least twice as long as the calyx.

G. neglecta

2. Pedicels at most ca. 1.5 times as long as the calyx.

G. virginiana