Jacobaea erratica(Bertol.) Fourr.

WFO wfo-0000064333 Accepted WFO 2026-06 8 photographs CC BY / CC BY-SA

Plate 1 figs. a–h · 8 separate observations

Jacobaea erratica, photographed by Patrick Hacker
fig. a Patrick Hacker, CC BY 4.0 / 2021-09-10 / obs. 157815963
Jacobaea erratica, photographed by Andrea Meucci
fig. b Andrea Meucci, CC BY-SA 4.0 / obs. 151641636
Jacobaea erratica, photographed by Andrea Meucci
fig. c Andrea Meucci, CC BY-SA 4.0 / obs. 148917753
Jacobaea erratica, photographed by Igor Balashov
fig. d Igor Balashov, CC BY 4.0 / obs. 91411733
Jacobaea erratica, photographed by Yves Bas
fig. e Yves Bas, CC BY 4.0 / obs. 48543322
Jacobaea erratica, photographed by carnifex
fig. f carnifex, CC BY 4.0 / obs. 21683382
Jacobaea erratica, photographed by Patrick Hacker
fig. g Patrick Hacker, CC BY 4.0 / obs. 141634346
Jacobaea erratica, photographed by Sarka Masova
fig. h Sarka Masova, CC BY 4.0 / obs. 98387113

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 27 botanical countries

Regions where Jacobaea erratica is native: Algeria, Morocco, Tunisia, Lebanon-Syria, North Caucasus, Transcaucasus, Türkiye, Austria, Bulgaria, Corse, Czechia-Slovakia, France, Germany, Greece, Hungary, Italy, Netherlands, NW. Balkan Pen., Poland, Portugal, Romania, Sardegna, Sicilia, Spain, Switzerland, Türkiye-in-Europe, Ukraine AlgeriaMoroccoTunisiaLebanon-SyriaNorth CaucasusTranscaucasusTürkiyeAustriaBulgariaCorseCzechia-SlovakiaFranceGermanyGreeceHungaryItalyNetherlandsNW. Balkan Pen.PolandPortugalRomaniaSiciliaSpainSwitzerlandTürkiye-in-EuropeUkraine Sardegna
Native distribution of Jacobaea erratica, 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
Austria AUT EUROPE
Bulgaria BUL
Corse COR
Czechia-Slovakia CZE
France FRA
Germany GER
Greece GRC
Hungary HUN
Italy ITA
Netherlands NET
NW. Balkan Pen. YUG
Poland POL
Portugal POR
Romania ROM
Sardegna SAR
Sicilia SIC
Spain SPA
Switzerland SWI
Türkiye-in-Europe TUE
Ukraine UKR
Lebanon-Syria LBS ASIA-TEMPERATE
North Caucasus NCS
Transcaucasus TCS
Türkiye TUR
Algeria ALG AFRICA
Morocco MOR
Tunisia TUN

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 259 observations

Condition 5th percentile Median 95th percentile
Coldest month, mean daily low -6.0 °C -3.6 °C 4.3 °C
Warmest month, mean daily high 22.4 °C 25.4 °C 28.4 °C
Annual rainfall 544 mm 717 mm 1,443 mm
Rainfall in the driest quarter 85 mm 115 mm 224 mm

It is found where winters bring hard frost. This is not care advice and it is not a forecast. It is a measurement: we sampled the climate at every one of the 259 research-grade observations of Jacobaea erratica 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 6 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.

  • Jacobaea aquatica var. erratica (Bertol.) Pelser & Meijden
  • Senecio aquaticus subsp. erraticus (Bertol.) Matthews
  • Senecio aquaticus subsp. erraticus (Bertol.) Tourlet
  • Senecio barbareaefoliis Krock.
  • Senecio barbareifolius Rchb.
  • Senecio erraticus Bertol.

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.