Plate 1 figs. a–h · 8 separate observations
Every figure is a research-grade observation under CC0, CC BY or CC BY-SA, rehosted with the photographer’s name, the licence and the observation it came from. Photographs under a NonCommercial licence are excluded from this site and are never stored, which costs us a great many pictures and is not negotiable.
Native range 5 botanical countries
| Region | TDWG code | Continent |
|---|---|---|
| France | FRA | EUROPE |
| Germany | GER | |
| Italy | ITA | |
| Spain | SPA | |
| Switzerland | SWI |
Region boundaries approximated from Natural Earth (public domain) and mapped to TDWG World Geographical Scheme for Recording Plant Distributions (WGSRPD) level-3 botanical countries (Brummitt 2001). Indicative, not the official WGSRPD geometry.
Where it actually grows measured, from 140 observations
| Condition | 5th percentile | Median | 95th percentile |
|---|---|---|---|
| Coldest month, mean daily low | -17.3 °C | -12.8 °C | -4.7 °C |
| Warmest month, mean daily high | 11.6 °C | 15.5 °C | 19.5 °C |
| Annual rainfall | 1,063 mm | 1,534 mm | 2,493 mm |
| Rainfall in the driest quarter | 128 mm | 251 mm | 396 mm |
It is found where winters are severely cold. This is not care advice and it is not a forecast. It is a measurement: we sampled the climate at every one of the 140 research-grade observations of Euphrasia alpina that carry a coordinate, and this is the range those places actually span. The 5th and 95th percentiles are used rather than the minimum and maximum, because a single cultivated specimen in a heated conservatory should not widen a tropical plant's range to the Arctic.
This is not a hardiness zone. A USDA zone is the average annual extreme minimum temperature. The figure above is the mean daily minimum of the coldest month, which is a different quantity and is typically far warmer. Reading one as the other would place a plant several zones too warm, so we do not publish a hardiness zone, because we do not have one.
Also published as 31 synonyms
A synonym is not an error. It is a record of botanists disagreeing, in print, about where this plant belongs. Each of these was somebody’s considered answer.
- Euphrasia alpina prol. capcirensis Sennen
- Euphrasia alpina prol. gautieri Sennen
- Euphrasia alpina prol. ponsii Sennen
- Euphrasia alpina prol. sennenii (Chabert) Rouy
- Euphrasia alpina subsp. sennenii (Chabert) Malag. & Barrau
- Euphrasia alpina unranked vidalii Chabert
- Euphrasia alpina var. breviaristata Bernoulli ex E.Steiger
- Euphrasia alpina var. dissecta Gaudin
- Euphrasia alpina var. grandiflora Gaudin
- Euphrasia alpina var. marianii Font Quer & Sennen ex Rothm.
- Euphrasia alpina var. media Gaudin
- Euphrasia alpina var. nana Wettst.
- Euphrasia alpina var. porphyrea Burnat
- Euphrasia alpina var. vestita Gremli
- Euphrasia alpina var. vidalii Rouy
- Euphrasia alpina var. viscidula M.Laínz
- Euphrasia cantabrica Font Quer & Rothm.
- Euphrasia capcirensis Sennen
- Euphrasia gautieri Sennen
- Euphrasia mariani Sennen
- Euphrasia mixta Gremli
- Euphrasia nemorosa subsp. alpina (Lam.) H.Marcailhou & A.Marcailhou
- Euphrasia nemorosa var. alpina (Lam.) Dumort.
- Euphrasia officinalis subsp. alpina (Lam.) Bonnier
and 7 more.
Sourcesevery claim on this page
- World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
- iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.
- Kew, World Checklist of Vascular Plants (WCVP v16). native distribution by TDWG level-3 botanical country, and life form. CC BY 3.0. Retrieved 2026-06-04.
We publish what we can source and we say so when we cannot. This page has no care advice and no toxicity claim, because we do not yet have those from a source we can cite.