Oclemena nemoralis(Aiton) Greene

bog aster

WFO wfo-0000072855 Accepted WFO 2026-06 8 photographs CC BY

Plate 1 figs. a–h · 8 separate observations

Oclemena nemoralis, photographed by Alexis Tinker-Tsavalas
fig. a Alexis Tinker-Tsavalas, CC BY 4.0 / 2021-10-11 / obs. 163502861
Oclemena nemoralis, photographed by Renee MacQuarrie
fig. b Renee MacQuarrie, CC BY 4.0 / obs. 158111688
Oclemena nemoralis, photographed by Quinten Wiegersma
fig. c Quinten Wiegersma, CC BY 4.0 / obs. 157608443
Oclemena nemoralis, photographed by Jay Pruett
fig. d Jay Pruett, CC BY 4.0 / obs. 153466266
Oclemena nemoralis, photographed by Max Miley
fig. e Max Miley, CC BY 4.0 / obs. 154385919
Oclemena nemoralis, photographed by Renee MacQuarrie
fig. f Renee MacQuarrie, CC BY 4.0 / obs. 149273706
Oclemena nemoralis, photographed by Simon Joly
fig. g Simon Joly, CC BY 4.0 / obs. 146436298
Oclemena nemoralis, photographed by Ian Manning
fig. h Ian Manning, CC BY 4.0 / obs. 95307910

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 19 botanical countries

Regions where Oclemena nemoralis is native: Connecticut, Delaware, Labrador, Maine, Maryland, Massachusetts, Michigan, New Brunswick, New Hampshire, New Jersey, New York, Newfoundland, Nova Scotia, Ontario, Pennsylvania, Prince Edward I., Québec, Rhode I., Vermont ConnecticutLabradorMaineMarylandMassachusettsMichiganNew BrunswickNew HampshireNew JerseyNew YorkNewfoundlandNova ScotiaOntarioPennsylvaniaPrince Edward I.QuébecVermont DelawareRhode I.
Native distribution of Oclemena nemoralis, 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
Connecticut CNT NORTHERN AMERICA
Delaware DEL
Labrador LAB
Maine MAI
Maryland MRY
Massachusetts MAS
Michigan MIC
New Brunswick NBR
New Hampshire NWH
New Jersey NWJ
New York NWY
Newfoundland NFL
Nova Scotia NSC
Ontario ONT
Pennsylvania PEN
Prince Edward I. PEI
Québec QUE
Rhode I. RHO
Vermont VER

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 315 in flower of 352 examined

Peak flowering in Aug. Each bar is the share of Oclemena nemoralis 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. 315 of 352 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.

Also published as 12 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 ledifolius Pursh
  • Aster ledifolius var. uniflorus (Michx.) Pursh
  • Aster nemoralis Aiton
  • Aster nemoralis f. albiflorus Fernald
  • Aster nemoralis f. nemoralis
  • Aster nemoralis var. nemoralis
  • Aster uniflorus Michx.
  • Eucephalus nemoralis (Aiton) Greene
  • Eucephalus nemoralis (Aiton) Greene
  • Galatella nemoralis Nees
  • Galatella nemoralis var. monocephalus DC.
  • Galatella nemoralis var. uniflora (Michx.) Hook.

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.