Oenanthe lachenaliiC.C.Gmel.

parsley water-dropwort

WFO wfo-0000384714 Accepted WFO 2026-06 8 photographs CC0 / CC BY / CC BY-SA

Plate 1 figs. a–h · 8 separate observations

Oenanthe lachenalii, photographed by Stephen James McWilliam
fig. a Stephen James McWilliam, CC0 1.0 / 2021-07-06 / obs. 150462494
Oenanthe lachenalii, photographed by Robert H. Wardell
fig. b Robert H. Wardell, CC0 1.0 / obs. 91403860
Oenanthe lachenalii, photographed by pete_gateley
fig. c pete_gateley, CC0 1.0 / obs. 156868710
Oenanthe lachenalii, photographed by pete_gateley
fig. d pete_gateley, CC0 1.0 / obs. 155873113
Oenanthe lachenalii, photographed by Terry Instone
fig. e Terry Instone, CC BY 4.0 / obs. 152045621
Oenanthe lachenalii, photographed by Andre Hosper
fig. f Andre Hosper, CC BY 4.0 / obs. 149114332
Oenanthe lachenalii, photographed by Andre Hosper
fig. g Andre Hosper, CC BY 4.0 / obs. 149129179
Oenanthe lachenalii, photographed by jvilla
fig. h jvilla, CC BY-SA 4.0 / obs. 84246947

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.

The specimen a real sheet, in a real collection

Herbarium
Smithsonian, US National Herbarium
Accession
US 770362
Filed as
Oenanthe lachenalii C.C.Gmel.
Det. by
not recorded on this sheet
Collected
W. O. Focke 1871-09-10
Origin
ZZ
The sheet
View the digitised specimen (CC0 1.0)

A real pressed plant, in a real collection, under the accession number above. Not an illustration of one. The holding institution does not serve this sheet’s image to third parties, so there is no photograph here. The record is real and the link goes to it. Where we hold no openly licensed sheet for a species this section is simply absent, and where a sheet never recorded who determined it, that field stays empty rather than being filled in. Roughly half of all herbarium sheets never recorded a determiner, which is ordinary.

Native range 19 botanical countries

Regions where Oenanthe lachenalii is native: Algeria, Belgium, Bulgaria, Corse, Denmark, France, Germany, Great Britain, Greece, Ireland, Italy, Netherlands, NW. Balkan Pen., Poland, Portugal, Sardegna, Sicilia, Spain, Switzerland AlgeriaBelgiumBulgariaCorseDenmarkFranceGermanyGreeceIrelandItalyNetherlandsNW. Balkan Pen.PolandPortugalSiciliaSpainSwitzerland Sardegna
Native distribution of Oenanthe lachenalii, 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
Belgium BGM EUROPE
Bulgaria BUL
Corse COR
Denmark DEN
France FRA
Germany GER
Great Britain GRB
Greece GRC
Ireland IRE
Italy ITA
Netherlands NET
NW. Balkan Pen. YUG
Poland POL
Portugal POR
Sardegna SAR
Sicilia SIC
Spain SPA
Switzerland SWI
Algeria ALG AFRICA

Not drawn on the map: Great Britain. We hold no public-domain boundary for this region, so it is listed rather than guessed at.

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 130 observations

Condition 5th percentile Median 95th percentile
Coldest month, mean daily low -0.4 °C 3.5 °C 7.6 °C
Warmest month, mean daily high 17.3 °C 20.0 °C 28.3 °C
Annual rainfall 615 mm 846 mm 1,367 mm
Rainfall in the driest quarter 51 mm 158 mm 236 mm

It is found where winters bring light 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 130 research-grade observations of Oenanthe lachenalii 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 14 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.

  • Oenanthe approximata Mérat
  • Oenanthe gymnorrhiza Brign.
  • Oenanthe jordanii Ten.
  • Oenanthe lachenalii var. approximata (Mérat) DC.
  • Oenanthe lachenalii var. minima Rouy & E.G.Camus
  • Oenanthe lachenalii var. parvula Corb.
  • Oenanthe marginata Vis.
  • Oenanthe megapolitana Willd.
  • Oenanthe michelfeldensis Lachen. ex Mert. & W.D.J.Koch
  • Oenanthe peucedanifolia var. lachenalii (C.C.Gmel.) Gaudin
  • Oenanthe peucedanoides Wredow
  • Oenanthe rhenana DC.
  • Phellandrium tabernaemontani Bubani
  • Selinum lachenalii (C.C.Gmel.) E.H.L.Krause

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. Wikidata. common name (P1843), joined on the World Flora Online identifier (P7715). CC0. Retrieved 2026-07-13.
  4. 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.