Galeopsis speciosaMill.

Edmonton hempnettlelarge-flowered hemp-nettle

WFO wfo-0000968053 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h · 8 separate observations

Galeopsis speciosa, photographed by Juraj Ahel
fig. a Juraj Ahel, CC BY 4.0 / 2021-09-19 / obs. 159960189

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 31 botanical countries

Regions where Galeopsis speciosa is native: Altay, Irkutsk, Krasnoyarsk, West Siberia, Albania, Austria, Baltic States, Belarus, Belgium, Bulgaria, Central European Russia, Czechia-Slovakia, Denmark, East European Russia, Finland, France, Germany, Greece, Hungary, Italy, Netherlands, North European Russia, Northwest European Russia, Norway, NW. Balkan Pen., Poland, Romania, South European Russia, Sweden, Switzerland, Ukraine AltayIrkutskKrasnoyarskWest SiberiaAlbaniaAustriaBaltic StatesBelarusBelgiumBulgariaCentral European RussiaCzechia-SlovakiaDenmarkEast European RussiaFinlandFranceGermanyGreeceHungaryItalyNetherlandsNorth European RussiaNorthwest European RussiaNorwayNW. Balkan Pen.PolandRomaniaSouth European RussiaSwedenSwitzerlandUkraine
Native distribution of Galeopsis speciosa, 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
Albania ALB EUROPE
Austria AUT
Baltic States BLT
Belarus BLR
Belgium BGM
Bulgaria BUL
Central European Russia RUC
Czechia-Slovakia CZE
Denmark DEN
East European Russia RUE
Finland FIN
France FRA
Germany GER
Greece GRC
Hungary HUN
Italy ITA
Netherlands NET
North European Russia RUN
Northwest European Russia RUW
Norway NOR
NW. Balkan Pen. YUG
Poland POL
Romania ROM
South European Russia RUS
Sweden SWE
Switzerland SWI
Ukraine UKR
Altay ALT ASIA-TEMPERATE
Irkutsk IRK
Krasnoyarsk KRA
West Siberia WSB

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 869 in flower of 870 examined

Proportion of examined Galeopsis speciosa in flower, by month
Month In flower Examined Share 95% interval
Jan 1 1 too few examined
Feb 0 0 too few examined
Mar 0 0 too few examined
Apr 0 0 too few examined
May 0 0 too few examined
Jun 58 58 100% 94% to 100%
Jul 307 307 100% 99% to 100%
Aug 348 348 100% 99% to 100%
Sep 118 118 100% 97% to 100%
Oct 31 32 97% 84% to 99%
Nov 5 5 100% 57% to 100%
Dec 1 1 too few examined

Peak flowering in Jun. Each bar is the share of Galeopsis speciosa 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. 869 of 870 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 6 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 2,065 observations

Condition 5th percentile Median 95th percentile
Coldest month, mean daily low -16.8 °C -8.6 °C -1.3 °C
Warmest month, mean daily high 18.1 °C 22.3 °C 24.7 °C
Annual rainfall 544 mm 720 mm 1,714 mm
Rainfall in the driest quarter 71 mm 114 mm 305 mm

It is found where winters are severely cold. This is not care advice and it is not a forecast. It is a measurement: we sampled the climate at every one of the 2,065 research-grade observations of Galeopsis speciosa 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 17 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.

  • Galeopsis cannabina Roth
  • Galeopsis crenifrons Borbás
  • Galeopsis flavescens Borbás
  • Galeopsis hispida Borbás
  • Galeopsis leiotricha (Borbás) Heinr.Braun
  • Galeopsis prostrata Vill.
  • Galeopsis pubescens Griseb.
  • Galeopsis speciosa f. alba H.Lindb.
  • Galeopsis speciosa f. purpurea H.Lindb.
  • Galeopsis speciosa var. boraei (Corb.) P.Fourn.
  • Galeopsis speciosa var. leiotricha Borbás
  • Galeopsis subalpina Schur
  • Galeopsis tetrahit subsp. versicolor (Curtis) Čelak.
  • Galeopsis tetrahit subsp. versicolor Arcang.
  • Galeopsis tetrahit var. boraei Corb.
  • Galeopsis unicolor Fr.
  • Galeopsis versicolor Curtis

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.