Lysimachia maritima(L.) Galasso, Banfi & Soldano

Sea-milkwortsea milkwort

WFO wfo-0000442738 Accepted WFO 2026-06 8 photographs CC0 / CC BY / CC BY-SA

Plate 1 figs. a–h · 8 separate observations

Lysimachia maritima, photographed by Grzegorz Grzejszczak
fig. a Grzegorz Grzejszczak, CC BY-SA 4.0 / 2022-06-07 / obs. 204612359

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
The New York Botanical Garden
Accession
5026219
Filed as
Lysimachia maritima (L.) Galasso, Banfi & Soldano
Det. by
not recorded on this sheet
Collected
not recorded
Origin
not recorded
The sheet
View the digitised specimen (CC BY 4.0)

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 97 botanical countries

Regions where Lysimachia maritima is native: Afghanistan, Altay, Buryatiya, China North-Central, China South-Central, China Southeast, Chita, Inner Mongolia, Iran, Irkutsk, Japan, Kazakhstan, Khabarovsk, Kirgizstan, Korea, Krasnoyarsk, Kuril Is., Manchuria, Mongolia, North Caucasus, Primorye, Qinghai, Sakhalin, Tadzhikistan, Tibet, Transcaucasus, Türkiye, Turkmenistan, Tuva, Uzbekistan, West Siberia, Xinjiang, Yakutiya, Nepal, Pakistan, West Himalaya, Austria, Baltic States, Belarus, Belgium, Central European Russia, Czechia-Slovakia, Denmark, East European Russia, Finland, France, Germany, Great Britain, Hungary, Iceland, Ireland, Krym, Netherlands, North European Russia, Northwest European Russia, Norway, NW. Balkan Pen., Poland, Portugal, South European Russia, Spain, Sweden, Ukraine, Alaska, Alberta, British Columbia, California, Colorado, Idaho, Maine, Manitoba, Maryland, Massachusetts, Minnesota, Montana, Nebraska, Nevada, New Brunswick, New Hampshire, New Mexico, New York, Newfoundland, North Dakota, Northwest Territories, Nova Scotia, Nunavut, Ontario, Oregon, Prince Edward I., Québec, Rhode I., Saskatchewan, Utah, Virginia, Washington, Wyoming, Yukon AfghanistanAltayBuryatiyaChina North-CentralChina South-CentralChina SoutheastChitaInner MongoliaIranIrkutskJapanKazakhstanKhabarovskKirgizstanKrasnoyarskManchuriaMongoliaNorth CaucasusPrimoryeQinghaiSakhalinTadzhikistanTibetTranscaucasusTürkiyeTurkmenistanTuvaUzbekistanWest SiberiaXinjiangYakutiyaNepalPakistanWest HimalayaAustriaBaltic StatesBelarusBelgiumCentral European RussiaCzechia-SlovakiaDenmarkEast European RussiaFinlandFranceGermanyHungaryIcelandIrelandKrymNetherlandsNorth European RussiaNorthwest European RussiaNorwayNW. Balkan Pen.PolandPortugalSouth European RussiaSpainSwedenUkraineAlaskaAlbertaBritish ColumbiaCaliforniaColoradoIdahoMaineManitobaMarylandMassachusettsMinnesotaMontanaNebraskaNevadaNew BrunswickNew HampshireNew MexicoNew YorkNewfoundlandNorth DakotaNorthwest TerritoriesNova ScotiaNunavutOntarioOregonPrince Edward I.QuébecSaskatchewanUtahVirginiaWashingtonWyomingYukon KoreaRhode I.
Native distribution of Lysimachia maritima, 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
Alaska ASK NORTHERN AMERICA
Alberta ABT
British Columbia BRC
California CAL
Colorado COL
Idaho IDA
Maine MAI
Manitoba MAN
Maryland MRY
Massachusetts MAS
Minnesota MIN
Montana MNT
Nebraska NEB
Nevada NEV
New Brunswick NBR
New Hampshire NWH
New Mexico NWM
New York NWY
Newfoundland NFL
North Dakota NDA
Northwest Territories NWT
Nova Scotia NSC
Nunavut NUN
Ontario ONT
Oregon ORE
Prince Edward I. PEI
Québec QUE
Rhode I. RHO
Saskatchewan SAS
Utah UTA
Virginia VRG
Washington WAS
Wyoming WYO
Yukon YUK
Afghanistan AFG ASIA-TEMPERATE
Altay ALT
Buryatiya BRY
China North-Central CHN
China South-Central CHC
China Southeast CHS
Chita CTA
Inner Mongolia CHI
Iran IRN
Irkutsk IRK
Japan JAP
Kazakhstan KAZ
Khabarovsk KHA
Kirgizstan KGZ
Korea KOR
Krasnoyarsk KRA
Kuril Is. KUR
Manchuria CHM
Mongolia MON
North Caucasus NCS
Primorye PRM
Qinghai CHQ
Sakhalin SAK
Tadzhikistan TZK
Tibet CHT
Transcaucasus TCS
Türkiye TUR
Turkmenistan TKM
Tuva TVA
Uzbekistan UZB
West Siberia WSB
Xinjiang CHX
Yakutiya YAK
Austria AUT EUROPE
Baltic States BLT
Belarus BLR
Belgium BGM
Central European Russia RUC
Czechia-Slovakia CZE
Denmark DEN
East European Russia RUE
Finland FIN
France FRA
Germany GER
Great Britain GRB
Hungary HUN
Iceland ICE
Ireland IRE
Krym KRY
Netherlands NET
North European Russia RUN
Northwest European Russia RUW
Norway NOR
NW. Balkan Pen. YUG
Poland POL
Portugal POR
South European Russia RUS
Spain SPA
Sweden SWE
Ukraine UKR
Nepal NEP ASIA-TROPICAL
Pakistan PAK
West Himalaya WHM

Not drawn on the map: Kuril Is., Great Britain. We hold no public-domain boundary for these regions, so they are 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.

Flowering 383 in flower of 525 examined

Proportion of examined Lysimachia maritima in flower, by month
Month In flower Examined Share 95% interval
Jan 0 0 too few examined
Feb 0 0 too few examined
Mar 0 0 too few examined
Apr 3 4 too few examined
May 76 103 74% 65% to 81%
Jun 229 252 91% 87% to 94%
Jul 71 109 65% 56% to 73%
Aug 2 33 6% 2% to 20%
Sep 1 19 5% 1% to 25%
Oct 1 5 20% 4% to 62%
Nov 0 0 too few examined
Dec 0 0 too few examined

Peak flowering in Jun. Each bar is the share of Lysimachia maritima observations in which someone actually recorded the reproductive state and found the plant in flower, not the raw number of flowering records. That distinction matters: people observe plants far more in spring than in winter, so a bare count of flowering records partly measures when people go outside. Dividing by the number examined removes that. 383 of 525 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 6 months have fewer than 5 examined observations, so no proportion is drawn for them. This is still a global aggregate and not a forecast for your garden: the same species flowers on different dates in different hemispheres. Where a species has fewer than 30 flowering records we do not draw this chart at all. Computed from 10.15468/dl.cgje2x.

When it blooms, where you are 1 state

StatePeaksObservations in flower
Maine Jun 54

Where it actually grows measured, from 1,990 observations

Condition 5th percentile Median 95th percentile
Coldest month, mean daily low -20.2 °C -1.6 °C 4.7 °C
Warmest month, mean daily high 15.3 °C 19.8 °C 25.4 °C
Annual rainfall 341 mm 886 mm 3,216 mm
Rainfall in the driest quarter 30 mm 159 mm 405 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 1,990 research-grade observations of Lysimachia maritima 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. Climate from CHELSA V2.1 (Karger et al. 2017); occurrences from 10.15468/dl.cgje2x.

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.

  • Glaucoides maritima Lunell
  • Glaucoides maritima var. obtusifolia Lunell
  • Glaux generalis E.H.L.Krause
  • Glaux maritima L.
  • Glaux maritima f. brevifolia Merino
  • Glaux maritima f. longifolia Merino
  • Glaux maritima subsp. obtusifolia (Fernald) B.Boivin
  • Glaux maritima var. angustifolia B.Boivin
  • Glaux maritima var. macrophylla B.Boivin
  • Glaux maritima var. obtusifolia Fernald
  • Glaux maritima var. rosea Freyn
  • Glaux spicata Phil. ex R.Knuth
  • Lysimachia maritima var. obtusifolia (Fernald) Yonek.
  • Vroedea maritima Bubani

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.