Description from Flora of China
Gratiola adenocaula Maximowicz, Bull. Acad. Imp. Sci. Saint-Petersbourg 32: 513. 1888.
Annuals. Stems 7-15 cm tall, simple or basally branched, succulent, basally subglabrous, apically sparsely capitate glandular. Leaves ovate-orbicular to ovate, 5-10 X 3-8 mm, smaller on branches, glabrous, base subamplexicaul, margin entire, apex acute to obtuse; veins 5-9, conspicuous or inconspicuous. Pedicel mostly straight, slender, 0.6-1.5 cm, capitate glandular. Calyx 2-2.5 mm, glabrous; lobes linear-lanceolate. Corolla blue, ca. 5 mm, middle lobe of lower lip 2-lobed. Style short. Capsule ovoid, as long as or slightly shorter than calyx, at first 2-loculicidal and later 4-valved. Seeds ellipsoid, reticulate. Fl. Aug.
Abandoned rice fields. Guizhou (Jiangkou Xian), Taiwan [Japan, Korea].