Species commonly cultivated
Gratiola officinalis L. (Europe)
G. peruviana L. (South America)
information not available
Annual or perennial. Stems ascending or erect, new shoots arising from basal stem appearing jointed. Leaves opposite, decussate, evenly spaced along stem, sessile; leaf blade ovate-lanceolate to linear; margin serrate. Inflorescence axillary. Flowers solitary, pedicellate; sepals 5, green, unequal; petals fused, 2-lipped, lobes 5, unequal, white. Dispersal by seed or stem fragments.
shallow water and wet ground
Gratiola contains approximately 20 species, of which only G. officinalis and G. peruviana are sometimes cultivated for ponds. Gratiola officinalis is widely used as a medicinal herb and is protected in France.