Eurybia sibirica(L.) G.L.Nesom

arctic aster

WFO wfo-0000104637 Accepted WFO 2026-06 8 photographs CC BY

Plate 1 figs. a–h · 8 separate observations

Eurybia sibirica, photographed by Andrew Meeds
fig. a Andrew Meeds, CC BY 4.0 / 2021-09-19 / obs. 159300909
Eurybia sibirica, photographed by Pavel Komkov
fig. b Pavel Komkov, CC BY 4.0 / obs. 150084069
Eurybia sibirica, photographed by Caleb Catto
fig. c Caleb Catto, CC BY 4.0 / obs. 147280146
Eurybia sibirica, photographed by Jason Grant
fig. d Jason Grant, CC BY 4.0 / obs. 146767036
Eurybia sibirica, photographed by Syd Cannings
fig. e Syd Cannings, CC BY 4.0 / obs. 144030102
Eurybia sibirica, photographed by Jason Grant
fig. f Jason Grant, CC BY 4.0 / obs. 142836681
Eurybia sibirica, photographed by Liam Steele
fig. g Liam Steele, CC BY 4.0 / obs. 143695010
Eurybia sibirica, photographed by Matt Muir
fig. h Matt Muir, CC BY 4.0 / obs. 146968354

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
1875614
Filed as
Eurybia sibirica (L.) G.L.Nesom
Det. by
not recorded on this sheet
Collected
R. S. Williams 1899-07-09
Origin
CA
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 29 botanical countries

Regions where Eurybia sibirica is native: Altay, Amur, Buryatiya, Chita, Inner Mongolia, Irkutsk, Japan, Kamchatka, Khabarovsk, Krasnoyarsk, Kuril Is., Magadan, Manchuria, Sakhalin, Tuva, West Siberia, Yakutiya, East European Russia, North European Russia, Norway, Sweden, Alaska, Alberta, British Columbia, Idaho, Montana, Northwest Territories, Nunavut, Yukon AltayAmurBuryatiyaChitaInner MongoliaIrkutskJapanKamchatkaKhabarovskKrasnoyarskMagadanManchuriaSakhalinTuvaWest SiberiaYakutiyaEast European RussiaNorth European RussiaNorwaySwedenAlaskaAlbertaBritish ColumbiaIdahoMontanaNorthwest TerritoriesNunavutYukon
Native distribution of Eurybia sibirica, 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.
RegionTDWG codeContinent
Altay ALT ASIA-TEMPERATE
Amur AMU
Buryatiya BRY
Chita CTA
Inner Mongolia CHI
Irkutsk IRK
Japan JAP
Kamchatka KAM
Khabarovsk KHA
Krasnoyarsk KRA
Kuril Is. KUR
Magadan MAG
Manchuria CHM
Sakhalin SAK
Tuva TVA
West Siberia WSB
Yakutiya YAK
Alaska ASK NORTHERN AMERICA
Alberta ABT
British Columbia BRC
Idaho IDA
Montana MNT
Northwest Territories NWT
Nunavut NUN
Yukon YUK
East European Russia RUE EUROPE
North European Russia RUN
Norway NOR
Sweden SWE

Not drawn on the map: Kuril Is.. 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.

Flowering 219 in flower of 239 examined

Peak flowering in Jul. Each bar is the share of Eurybia sibirica 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. 219 of 239 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 8 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.

Where it actually grows measured, from 1,710 observations

Condition 5th percentile Median 95th percentile
Coldest month, mean daily low -31.0 °C -20.6 °C -11.2 °C
Warmest month, mean daily high 13.5 °C 18.6 °C 23.0 °C
Annual rainfall 330 mm 570 mm 1,389 mm
Rainfall in the driest quarter 34 mm 63 mm 231 mm

It is found where winters are arctic. This is not care advice and it is not a forecast. It is a measurement: we sampled the climate at every one of the 1,710 research-grade observations of Eurybia sibirica 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 29 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.

  • Aster ammani Lindl. ex DC.
  • Aster biflorus Presc. ex DC.
  • Aster espenbergensis Nees
  • Aster giganteus Rydb.
  • Aster ircutianus DC.
  • Aster lacerus Lindl. ex DC.
  • Aster montanus R.Br.
  • Aster montanus Richardson
  • Aster montanus var. giganteus (Hook.) Torr. & A.Gray
  • Aster montanus var. montanus
  • Aster prascottii Lindl. ex DC.
  • Aster richardsonii Spreng.
  • Aster richardsonii var. giganteus Hook.
  • Aster richardsonii var. richardsonii
  • Aster sachalinensis Kudô
  • Aster salsuginosus Less.
  • Aster sibiricus L.
  • Aster sibiricus f. sibiricus
  • Aster sibiricus subsp. richardsonii (Spreng.) Á.Löve & D.Löve
  • Aster sibiricus subsp. sibiricus
  • Aster sibiricus subsp. subintegerrimus (Trautv.) Á.Löve & D.Löve
  • Aster sibiricus var. giganteus (Hook.) A.Gray
  • Aster sibiricus var. sibiricus
  • Aster sibiricus var. subintegerrimus Trautv.

and 5 more.

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.