Stachys pilosaNutt.

hairy hedgenettle

WFO wfo-0000314414 Accepted WFO 2026-06 8 photographs CC0 / CC BY / CC BY-SA

Plate 1 figs. a–h · 8 separate observations

Stachys pilosa, photographed by Ryan Sorrells
fig. a Ryan Sorrells, CC BY 4.0 / 2021-09-28 / obs. 160346017
Stachys pilosa, photographed by Eric Lamb
fig. b Eric Lamb, CC BY 4.0 / obs. 156396498
Stachys pilosa, photographed by Reid Hardin
fig. c Reid Hardin, CC BY 4.0 / obs. 145738867
Stachys pilosa, photographed by Mike B
fig. d Mike B, CC BY-SA 4.0 / obs. 82546972
Stachys pilosa, photographed by msieges
fig. e msieges, CC0 1.0 / obs. 45449830
Stachys pilosa, photographed by Katie Kucera
fig. f Katie Kucera, CC BY 4.0 / obs. 44576025
Stachys pilosa, photographed by mfeaver
fig. g mfeaver, CC BY 4.0 / obs. 23123702
Stachys pilosa, photographed by Ben Keen
fig. h Ben Keen, CC0 1.0 / obs. 143502719

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 38 botanical countries

Regions where Stachys pilosa is native: Alaska, Alberta, Arizona, Arkansas, British Columbia, California, Colorado, Connecticut, District of Columbia, Illinois, Indiana, Iowa, Kansas, Kentucky, Maine, Manitoba, Massachusetts, Michigan, Minnesota, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Mexico, New York, Newfoundland, Northwest Territories, Ohio, Ontario, Oregon, Saskatchewan, South Dakota, Vermont, Washington, Wisconsin, Wyoming, Yukon AlaskaAlbertaArizonaArkansasBritish ColumbiaCaliforniaColoradoConnecticutIllinoisIndianaIowaKansasKentuckyMaineManitobaMassachusettsMichiganMinnesotaMissouriMontanaNebraskaNevadaNew HampshireNew MexicoNew YorkNewfoundlandNorthwest TerritoriesOhioOntarioOregonSaskatchewanSouth DakotaVermontWashingtonWisconsinWyomingYukon District of Columbia
Native distribution of Stachys pilosa, 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
Alaska ASK NORTHERN AMERICA
Alberta ABT
Arizona ARI
Arkansas ARK
British Columbia BRC
California CAL
Colorado COL
Connecticut CNT
District of Columbia WDC
Illinois ILL
Indiana INI
Iowa IOW
Kansas KAN
Kentucky KTY
Maine MAI
Manitoba MAN
Massachusetts MAS
Michigan MIC
Minnesota MIN
Missouri MSO
Montana MNT
Nebraska NEB
Nevada NEV
New Hampshire NWH
New Mexico NWM
New York NWY
Newfoundland NFL
Northwest Territories NWT
Ohio OHI
Ontario ONT
Oregon ORE
Saskatchewan SAS
South Dakota SDA
Vermont VER
Washington WAS
Wisconsin WIS
Wyoming WYO
Yukon YUK

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 134 in flower of 148 examined

Peak flowering in Jul. Each bar is the share of Stachys pilosa 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. 134 of 148 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.

Where it actually grows measured, from 1,095 observations

Condition 5th percentile Median 95th percentile
Coldest month, mean daily low -21.7 °C -15.0 °C -8.3 °C
Warmest month, mean daily high 21.6 °C 23.0 °C 28.3 °C
Annual rainfall 369 mm 478 mm 989 mm
Rainfall in the driest quarter 35 mm 54 mm 153 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 1,095 research-grade observations of Stachys pilosa 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 21 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.

  • Stachys ampla Rydb.
  • Stachys arenicola Britton
  • Stachys asperrima Rydb.
  • Stachys borealis Rydb.
  • Stachys bracteata Greene
  • Stachys brevidens Rydb.
  • Stachys homotricha (Fernald) Rydb.
  • Stachys leibergii Rydb.
  • Stachys palustris f. stevensonis B.Boivin
  • Stachys palustris subsp. homotricha (Rydb.) Hultén
  • Stachys palustris subsp. pilosa (Nutt.) Epling
  • Stachys palustris var. homotricha Fernald
  • Stachys palustris var. pilosa (Nutt.) Fernald
  • Stachys palustris var. puberula Jenn.
  • Stachys pilosa var. homotricha (Fernald) Mohlenbr.
  • Stachys puberula (Jenn.) Rydb.
  • Stachys pustulosa Rydb.
  • Stachys schweinitzii Rydb.
  • Stachys scopulorum Greene
  • Stachys teucriformis Rydb.
  • Stachys velutina Schwein.

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.