Epilobium collinumC.C.Gmel.

WFO wfo-0000668945 Accepted WFO 2026-06 6 photographs CC0 / CC BY

Plate 1 figs. a–f · 3 observations

This species has been photographed under an open licence only 3 times, so some figures below are different views of the same plant, taken on the same day, rather than different individuals. They are usually different parts of it: the leaf, the flower, the bark.

Epilobium collinum, photographed by Kostas Zontanos
fig. a Kostas Zontanos, CC BY 4.0 / 2016-07-24 / obs. 12399097
Epilobium collinum, photographed by Tero Linjama
fig. b Tero Linjama, CC0 1.0 / obs. 80312537
Epilobium collinum, photographed by Kostas Zontanos
fig. c Kostas Zontanos, CC BY 4.0 / obs. 12399089
Epilobium collinum, photographed by Kostas Zontanos
fig. d Kostas Zontanos, CC BY 4.0 / obs. 12399083
Epilobium collinum, photographed by Denis Bastianelli
fig. e Denis Bastianelli, CC BY 4.0 / obs. 113297676
Epilobium collinum, photographed by Denis Bastianelli
fig. f Denis Bastianelli, CC BY 4.0 / obs. 113297746

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 30 botanical countries

Regions where Epilobium collinum is native: Altay, West Siberia, Albania, Austria, Baltic States, Belarus, Belgium, Bulgaria, Central European Russia, Corse, Czechia-Slovakia, East European Russia, Finland, France, Germany, Greece, Hungary, Iceland, Italy, North European Russia, Northwest European Russia, Norway, NW. Balkan Pen., Poland, Romania, Sardegna, South European Russia, Spain, Sweden, Ukraine AltayWest SiberiaAlbaniaAustriaBaltic StatesBelarusBelgiumBulgariaCentral European RussiaCorseCzechia-SlovakiaEast European RussiaFinlandFranceGermanyGreeceHungaryIcelandItalyNorth European RussiaNorthwest European RussiaNorwayNW. Balkan Pen.PolandRomaniaSouth European RussiaSpainSwedenUkraine Sardegna
Native distribution of Epilobium collinum, after Kew’s World Checklist of Vascular Plants. Introduced, extinct and doubtful records are excluded, so this is where the plant is from, not everywhere it now grows. Regions too small to draw at this scale are marked with a dot.
RegionTDWG codeContinent
Albania ALB EUROPE
Austria AUT
Baltic States BLT
Belarus BLR
Belgium BGM
Bulgaria BUL
Central European Russia RUC
Corse COR
Czechia-Slovakia CZE
East European Russia RUE
Finland FIN
France FRA
Germany GER
Greece GRC
Hungary HUN
Iceland ICE
Italy ITA
North European Russia RUN
Northwest European Russia RUW
Norway NOR
NW. Balkan Pen. YUG
Poland POL
Romania ROM
Sardegna SAR
South European Russia RUS
Spain SPA
Sweden SWE
Ukraine UKR
Altay ALT ASIA-TEMPERATE
West Siberia WSB

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 72 observations

Condition 5th percentile Median 95th percentile
Coldest month, mean daily low -15.8 °C -7.9 °C -2.5 °C
Warmest month, mean daily high 13.3 °C 18.8 °C 23.2 °C
Annual rainfall 666 mm 1,208 mm 2,373 mm
Rainfall in the driest quarter 101 mm 212 mm 437 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 72 research-grade observations of Epilobium collinum 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 11 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.

  • Epilobium acinifolium Rchb. ex Schur
  • Epilobium carpetanum Willk.
  • Epilobium ebrodunense Chaix ex Hausskn.
  • Epilobium lapponicum Bauer ex Hausskn.
  • Epilobium montanum prol. carpetanum (Willk.) Rouy & E.G.Camus
  • Epilobium montanum subsp. collinum (C.C.Gmel.) Schübl. & G.Martens
  • Epilobium montanum var. carpetanum (Willk.) Merino
  • Epilobium montanum var. collinum (C.C.Gmel.) Mert. & W.D.J.Koch
  • Epilobium montanum var. collinum (C.C.Gmel.) Gren. & Godr.
  • Epilobium nitidum Host
  • Epilobium nutans Lej.

Sourcesevery claim on this page

  1. World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
  2. iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.
  3. 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.