Maianthemum dilatatum(Alph.Wood) A.Nelson & J.F.Macbr.

Western Lily of the Valley

WFO wfo-0000691294 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Maianthemum dilatatum, photographed by Mud_Skipper
fig. a Mud_Skipper, CC BY 4.0 / 2022-06-04 / obs. 203340686
Maianthemum dilatatum, photographed by Randal
fig. b Randal, CC0 1.0 / obs. 205162478
Maianthemum dilatatum, photographed by Phillip Neal
fig. c Phillip Neal, CC0 1.0 / obs. 203353916
Maianthemum dilatatum, photographed by Peter Abrahamsen
fig. d Peter Abrahamsen, CC BY 4.0 / obs. 202007602
Maianthemum dilatatum, photographed by Jens-Christian Svenning
fig. e Jens-Christian Svenning, CC BY 4.0 / obs. 202871042
Maianthemum dilatatum, photographed by Jens-Christian Svenning
fig. f Jens-Christian Svenning, CC BY 4.0 / obs. 202867348
Maianthemum dilatatum, photographed by Jens-Christian Svenning
fig. g Jens-Christian Svenning, CC BY 4.0 / obs. 202614584
Maianthemum dilatatum, photographed by Giselle Blythe
fig. h Giselle Blythe, CC0 1.0 / obs. 204550488

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.

Confused withby our own model

These are not lookalikes we guessed at. Each one is a species our identification model genuinely mistook for this plant, and how many times. The error rate is published.

Flowering n = 798 observations

Peak flowering in May, from 798 community-annotated observations worldwide. This is a global aggregate, not a forecast for your garden: the same species flowers on different dates in different hemispheres, and citizen-science records cluster near cities, at weekends, and in spring. Where a species has fewer than 30 annotated records we do not draw this chart at all.

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.

  • Convallaria bifolia var. kamtschatica J.F.Gmel.
  • Convallaria bifolia var. kamtschaticum S.G.Gmel.
  • Maianthemum bifolium subsp. kamtschaticum (J.F.Gmel.) A.E.Murray
  • Maianthemum bifolium var. dilatatum Alph.Wood
  • Maianthemum bifolium var. kamtschaticum (J.F.Gmel.) Trautv. & C.A.Mey.
  • Maianthemum bifolium var. kamtschaticum (S.G.Gmel. ex Cham.) Jeps.
  • Maianthemum kamtschaticum (J.F.Gmel.) Nakai
  • Smilacina bifolia var. kamtschatica S.G.Gmel.
  • Smilacina dilatata (Alph.Wood) Nutt. ex Baker
  • Unifolium bifolium subsp. kamtschaticum (J.F.Gmel.) Piper
  • Unifolium dilatatum (Alph.Wood) Greene
  • Unifolium kamtschaticum (J.F.Gmel.) Gorman

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.

We publish what we can source and we say so when we cannot. This page has no care advice, no toxicity claim and no native range, because we do not yet have those from a source we can cite.