Orobanchaceae
Maritime eyebright
Euphrasia tetraquetra
- Family
- Orobanchaceae
- Genus
- Euphrasia
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Common names
By language (3)
- Dutch
- Vierrijige ogentroost
- English
- Maritime eyebright
- Welsh
- Effros y Gorllewin
Synonyms
- Euphrasia gracilis subsp. tetraquetra (Bréb.) Nyman
- Euphrasia gracilis var. tetraquetra (Bréb.) Corb.
- Euphrasia nemorosa var. tetraquetra (Bréb.) Rouy
- Euphrasia officinalis subsp. tetraquetra (Bréb.) Bonnier
- Euphrasia officinalis var. tetraquetra Bréb.
Flowers
- In flower
- July (from 5 flowering iNaturalist observations worldwide)
Characteristics
- Growth habit
- Forb/herb
- Lifespan
- Annual
- In the US and Canada
- Lower 48 states: introduced
Photos
FlowerPhoto: Dave, CC BY 4.0, from iNaturalist 
Photo: Wikimedia Commons contributor, CC BY-SA 3.0, from Wikimedia Commons 
Photo: Barry Stewart, CC BY 4.0, from iNaturalist 
Photo: Rudolphous, CC BY-SA 4.0, from Wikimedia Commons 
Photo: Rudolphous, CC BY-SA 4.0, from Wikimedia Commons 
Photo: Michel Langeveld, CC BY-SA 4.0, from Wikimedia Commons 
Photo: Michel Langeveld, CC BY-SA 4.0, from Wikimedia Commons
More in Euphrasia
- Drug eyebrightEuphrasia strictaOrobanchaceae
- Northern eyebrightEuphrasia micranthaOrobanchaceae
- Euphrasia salisburgensisOrobanchaceae
- Euphrasia hirtellaOrobanchaceae
- Common eyebrightEuphrasia nemorosaOrobanchaceae
- EyebrightEuphrasia officinalisOrobanchaceae
- EyebrightEuphrasia frigidaOrobanchaceae
- Euphrasia argutaOrobanchaceae
- Euphrasia pectinataOrobanchaceae
- Euphrasia grandifloraOrobanchaceae
- Euphrasia pictaOrobanchaceae
- Euphrasia azoricaOrobanchaceae
Sources: classification, synonyms from World Flora Online Plant List (2026-06, CC0 1.0); common names, popularity from Wikidata (2026-10-26, CC0 1.0); common names, US characteristics from USDA PLANTS Database (2025-05-29, CC0 1.0). About our plant data.