Euphrasia tetraquetra
species of plant
- English: maritime eyebright
- Cymraeg: effros y Gorllewin
- Nederlands: Vierrijige ogentroost
APG IV Classification: Domain: Eukaryota • (unranked): Archaeplastida • Regnum: Plantae • Cladus: Angiosperms • Cladus: eudicots • Cladus: core eudicots • Cladus: superasterids • Cladus: asterids • Cladus: euasterids I • Ordo: Lamiales • Familia: Orobanchaceae • Genus: Euphrasia • Species: Euphrasia tetraquetra Around. (1862)