Mesostemma dichotomum(L.) Arabi, Rabeler & Zarre

WFO wfo-1000079185 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h · 8 separate observations

Mesostemma dichotomum, photographed by Aleksei Baushev
fig. a Aleksei Baushev, CC BY 4.0 / 2021-09-13 / obs. 158450281
Mesostemma dichotomum, photographed by Aleksei Baushev
fig. b Aleksei Baushev, CC BY 4.0 / obs. 158445486
Mesostemma dichotomum, photographed by Pavel Komkov
fig. c Pavel Komkov, CC BY 4.0 / obs. 150015533
Mesostemma dichotomum, photographed by Татьяна Фирсова
fig. d Татьяна Фирсова, CC0 1.0 / obs. 141815358
Mesostemma dichotomum, photographed by Татьяна Фирсова
fig. e Татьяна Фирсова, CC0 1.0 / obs. 141598759
Mesostemma dichotomum, photographed by Владимир Преловский
fig. f Владимир Преловский, CC0 1.0 / obs. 142552349
Mesostemma dichotomum, photographed by Владимир Преловский
fig. g Владимир Преловский, CC0 1.0 / obs. 141145134
Mesostemma dichotomum, photographed by Анна Васильченко
fig. h Анна Васильченко, CC BY 4.0 / obs. 138279638

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 929 observations

Condition 5th percentile Median 95th percentile
Coldest month, mean daily low -29.8 °C -24.0 °C -18.7 °C
Warmest month, mean daily high 17.5 °C 20.9 °C 25.6 °C
Annual rainfall 189 mm 310 mm 514 mm
Rainfall in the driest quarter 7 mm 13 mm 34 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 929 research-grade observations of Mesostemma dichotomum 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 Reading one as the other would place a plant several zones too warm, so we do not publish a hardiness zone, because we do not have one.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 10 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.

  • Arenaria stephaniana (Willd.) Shinners
  • Arenaria stephaniana var. americana (Porter ex B.L.Rob.) Shinners
  • Stellaria dichotoma f. lanceolata (Bunge) Kitag.
  • Stellaria dichotoma unranked lanceolata Bunge
  • Stellaria dichotoma var. cordifolia Bunge
  • Stellaria dichotoma var. dichotoma
  • Stellaria dichotoma var. heterophylla Fenzl
  • Stellaria dichotoma var. stephaniana (Willd. ex Schltdl.) Regel
  • Stellaria gypsophilloides var. lanceolata (Bunge) Kozhevn.
  • Stellaria stephaniana Willd. ex D.F.K.Schltdl.

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 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.