Plagiothecium undulatum(Hedw.) Schimp.

undulate plagiothecium moss

WFO wfo-0001162913 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h · 8 separate observations

Plagiothecium undulatum, photographed by Randal
fig. a Randal, CC0 1.0 / 2022-06-07 / obs. 204280956
Plagiothecium undulatum, photographed by Rafael Medina
fig. b Rafael Medina, CC BY 4.0 / obs. 205976333
Plagiothecium undulatum, photographed by Jens-Christian Svenning
fig. c Jens-Christian Svenning, CC BY 4.0 / obs. 204035203
Plagiothecium undulatum, photographed by Randal
fig. d Randal, CC0 1.0 / obs. 203966665
Plagiothecium undulatum, photographed by George Greiff
fig. e George Greiff, CC BY 4.0 / obs. 203471935
Plagiothecium undulatum, photographed by José Luis Camaño
fig. f José Luis Camaño, CC0 1.0 / obs. 204440850
Plagiothecium undulatum, photographed by José Luis Camaño
fig. g José Luis Camaño, CC0 1.0 / obs. 204398062
Plagiothecium undulatum, photographed by José Luis Camaño
fig. h José Luis Camaño, CC0 1.0 / obs. 204398721

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.

Where it actually grows measured, from 2,009 observations

Condition 5th percentile Median 95th percentile
Coldest month, mean daily low -5.8 °C 0.5 °C 4.9 °C
Warmest month, mean daily high 16.1 °C 20.8 °C 24.7 °C
Annual rainfall 823 mm 1,999 mm 3,994 mm
Rainfall in the driest quarter 93 mm 228 mm 413 mm

It is found where winters bring hard 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 2,009 research-grade observations of Plagiothecium undulatum 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 Reading one as the other would place a plant several zones too warm, so we do not publish a hardiness zone, because we do not have one.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 23 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.

  • Buckiella undulata (Hedw.) Ireland
  • Hypnum undulatum Hedw.
  • Neckeropsis undulata (Hedw.) Kindb. ex J.A.Allen
  • Pancovia undulata (Hedw.) J.Kickx f.
  • Plagiothecium myurum (Cardot & Thér.) Jedl.
  • Plagiothecium subteres (Jedl.) Jedl.
  • Plagiothecium teres (Mönk.) Jedl.
  • Plagiothecium undulatum f. densum (Röll) Podp. ex Jedl.
  • Plagiothecium undulatum f. elongatum Jedl.
  • Plagiothecium undulatum f. flaccidum Jedl.
  • Plagiothecium undulatum f. flagellaceum Jedl.
  • Plagiothecium undulatum f. hygrophilum Jedl.
  • Plagiothecium undulatum f. myurum (Cardot & Thér.) Jedl.
  • Plagiothecium undulatum f. recurvum Jedl.
  • Plagiothecium undulatum f. subjulaceum Boulay
  • Plagiothecium undulatum f. subteres Jedl.
  • Plagiothecium undulatum f. teres (Mönk.) Mönk.
  • Plagiothecium undulatum f. turgidum Jedl.
  • Plagiothecium undulatum subsp. subneckeroideum Kindb.
  • Plagiothecium undulatum var. densum Röll
  • Plagiothecium undulatum var. myurum Cardot & Thér.
  • Plagiothecium undulatum var. teres Mönk.
  • Stereodon undulatus (Hedw.) Mitt.

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.

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. It has no native range either: Kew's checklist does not cover this taxon.