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Ajuga genevensis; photograph (c) Edmundas Greimas, some rights reserved (CC BY) CC BY(c) Edmundas Greimas, some rights reserved (CC BY) · observed growing wild · 2026-06-26

Ajuga genevensis L.

Blue bugle; Cornish Bugle; Geneva bugle; Geneva bugleweed

Lamiaceae · Austria, Belgium +25

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Ajuga genevensis, photograph (c) Edmundas Greimas, some rights reserved (CC BY)Ajuga genevensis, photograph (c) Edmundas Greimas, some rights reserved (CC BY)Ajuga genevensis, photograph (c) Quinten Wiegersma, some rights reserved (CC BY)Ajuga genevensis, photograph (c) Quinten Wiegersma, some rights reserved (CC BY)Ajuga genevensis, photograph (c) Quinten Wiegersma, some rights reserved (CC BY)Ajuga genevensis, photograph (c) Tatyana Davidova, some rights reserved (CC BY) 67 photographs ›
Habitat figures
Cold floor (1 night in 100)
-11.5°C
Record low -19.8 °C in 44 years, at a typical spot in the range NASA POWER
Warmest month, mean daily high
23°C
Jul and Aug at the habitat CHELSA
Rain a year (median across the range)
813mm
12 months of 25 mm or more in the median year CHELSA
Open-sky light
6–36DLI
Lowest to highest month (DLI) CHELSA
The year in your months, northern hemisphere
  1. Jan
  2. Feb
  3. Mar
  4. Apr
  5. May
  6. Jun
  7. Jul
  8. Aug
  9. Sep
  10. Oct
  11. Nov
  12. Dec
Rain spread: 70% of the median year's rain takes 8 months, so no short rainy season. rain rule, CHELSA
Northern hemisphere unless you set your site. The chart is in the habitat's months.

Summary

A. genevensis (also variously known as the upright bugle, blue bugle, Geneva bugleweed, blue bugleweed) is a herbaceous flowering plant native to Europe. It is less common than its relative, Ajuga reptans (common bugle).

Quoted from Wikipedia, "Ajuga genevensis", CC BY-SA 4.0.

About the genus · Ajuga

Ajuga, also known as bugleweed, ground pine, carpet bugle, or just bugle, is a genus of flowering plants in the Ajugeae tribe of the mint family Lamiaceae. Over 60 species of annual or perennial, mostly herbaceous plants are known. They are native to Europe, Asia, Africa, and Australia.

Quoted from Wikipedia, "Ajuga", CC BY-SA 4.0.

Cultivation

Seasons

The rain rule reads no short rainy season: 70% of the median year's rain (586 mm of 810 mm) takes 8 months, May to December. Mean temperature moves 19.1 °C between the warmest and coldest month. Months are the habitat's, northern hemisphere; shifted six months for a southern-hemisphere collection: November to June.

Rain

810 mm in the median year at the habitat, 586 mm of it May to December. Wettest month May at 80 mm, driest month February at 50 mm. Across the grid cells of the range the year's total runs 583 mm to 1,413 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 813 mm, is the year's rain at the top of the page; the 810 mm here is the median year's, the twelve monthly medians added, which the rain rule reads. Habitat calendar, northern hemisphere; median year across the grid cells of the range, CHELSA.

Light

Open sky over the habitat: 6 to 36 mol/m²/day across the year (daily light integral, median year across the grid cells of the range, CHELSA; the lowest 10th-percentile month across the cells is 4, the highest 90th-percentile month 41).

Warmth and air
Temperature

Coldest: the 1st-percentile night over 44 years at a typical spot in the range is -11.5 °C, the absolute minimum -19.8 °C, 6,206 frost nights in 44 years, 141.0 a year (NASA POWER daily minima). Warmest: the 99th-percentile day is 30.3 °C. Monthly means: the coldest month's mean nightly low -3.4 °C in January (across the grid cells of the range -9.2 °C to 0.9 °C), the warmest month's mean daily high 23.2 °C in July (median year across the grid cells of the range, CHELSA). Cold floor: -11.5 °C, which is the 1st-percentile night over 44 years at a typical spot in the range (NASA POWER).

Humidity

Relative humidity at the habitat: 58 to 67% across the year (monthly means, median year across the grid cells of the range, CHELSA). A figure about the air, saying nothing about how the plant takes water.

How this section is made

Each card states this species' habitat figures with their sources, and what two fixed rules read from them; nothing here says what the plant does, wants or tolerates. The rules · the terms.

Seasons. Read from the median year of CHELSA monthly rainfall and mean temperature across the grid cells of the range: the rain rule takes the smallest set of months carrying 70% of the rain and calls it winter when its mean is more than half a degree below the year's, summer when more than that above, and neither in between; the temperature rule, used only under 120 mm, names the cooler six months when they are at least a degree cooler than the other six. Months are shifted for the other hemisphere only where the temperature curve moves 4 °C or more and the habitat lies 10° or more from the equator. A reading of the curves, not an observation of the plant.

Rain. CHELSA monthly precipitation, median year across the grid cells of the range. The rain that falls where the species is recorded; nothing about how the plant takes water.

Light. CHELSA shortwave radiation at each envelope cell, a daily-mean flux taken to a daily total and converted at 2.07 mol of PAR per MJ. The sky over the habitat, measured; what reaches a plant under a rock, a shrub or a shade cloth is not.

Temperature. NASA POWER daily minima and maxima over 44 years at a typical spot in the range, lapse-corrected +329 m to its elevation; CHELSA monthly means, median year across the grid cells of the range. The cold floor is the 1st-percentile night named in its sentence. Not a measured survival limit for any plant in a pot.

Humidity. CHELSA relative humidity, median year across the grid cells of the range.

Climate across the habitat

Habitat months, northern hemisphere

Habitat climate of Ajuga genevensis through the yearWarmest months July and August, mean daily high 23 °C; coldest month January, mean nightly low -3.4 °C; 810 mm of rain in the median year (the twelve monthly medians added). Medians across the range, from CHELSA; the extremes at the edge from NASA POWER. Habitat months, northern hemisphere.-30°-20°-10°0°10°20°30°40°frost30.3° 99th-percentile day, NASA POWER-19.8° lowest night in 44 years, NASA POWER°C · day and nightcold quarter0255075100125150mm rainDLI 6–36RH 58–67%JanFebMarAprMayJunJulAugSepOctNovDec
day night rain medians and 10th–90th percentile across 1347 habitat cells, CHELSA cold quarter: the three months around the coldest month's mean nightly low extremes over 44 years at a typical spot in the range, from NASA POWER, marked at the edge, in no month DLI, mol/m²/dayRH %each on its own scale
Figures by month
JanFebMarAprMayJunJulAugSepOctNovDec
Day °C3 / -3–74 / -2–88 / 3–1113 / 10–1518 / 15–2021 / 18–2323 / 21–2623 / 20–2519 / 16–2114 / 10–167 / 3–103 / -2–7
Night °C-3 / -9–1-3 / -9–10 / -5–34 / 0–68 / 5–1012 / 8–1414 / 11–1614 / 11–1610 / 8–126 / 3–91 / -3–4-2 / -8–2
Rain mm60 / 34–11050 / 33–9057 / 35–10157 / 36–11680 / 53–13479 / 59–12476 / 57–12671 / 52–12468 / 50–12973 / 40–14967 / 45–13672 / 43–131
DLI7 / 5–1113 / 10–1720 / 18–2529 / 27–3234 / 33–3736 / 34–4036 / 33–4131 / 28–3522 / 19–2714 / 11–188 / 5–116 / 4–9
RH %66 / 61–7064 / 60–6861 / 59–6459 / 57–6159 / 56–6159 / 57–6158 / 56–6059 / 56–6161 / 59–6364 / 61–6667 / 62–6967 / 62–71
How this section is made
Each figure is the median across the 1347 grid cells on land that hold in-range records (1445 records in those cells; 1 more cell holds records but no land by the elevation layer, so those records sit at sea and the cell is left out), with the 10th–90th percentile span across those cells after the slash where it differs. A dash is a month one or more of those cells has no figure for in the grid (a variable CHELSA does not carry there), so no median is taken rather than one over fewer cells. Extremes and elevation were read at a typical spot in the range, cell 901:3681 (44.925, 4.075). Over 44 years there: absolute minimum -19.8 °C, 1st-percentile night -11.5 °C, 99th-percentile day 30.3 °C. Normals: CHELSA V2.1 1981–2010 climatology, 0.05° cells (each the mean of ~36 1 km pixels). Across the range: median and 10th–90th percentile of each month across the 1347 distinct grid cells holding 1445 of the 1446 in-range records (1 further cell with records at sea, by the elevation layer, left out); extremes and elevation at the typical cell 901:3681 (its coldest month's mean nightly low nearest the median across cells); its position is the cell centre. Extremes: NASA POWER (MERRA-2) daily 1981–2024, cell 45.00_4.375, lapse-corrected +329 m at 6.5 °C/km. Elevation: ETOPO 2022, 1136 m (cell mean).

Natural habitat

Native range as published by WCVP; the marker is where the records are densest and decides nothing: the climate was read across the cells of the in-range records placed well enough to read one, not at the marker.
Openly licensed records inside the range, framed on where they fall.
NativeAustria, Belgium, Czechoslovakia, Germany, Hungary, Netherlands, Poland, Switzerland, France, Albania, Bulgaria, Greece, Italy, Romania, Turkey-in-Europe, Yugoslavia, Belarus, Baltic States, Krym, Central European Russia, East European Russia, South European Russia, Northwest European Russia, Ukraine, North Caucasus, Transcaucasus, Turkey · introduced: Ontario, Québec, Illinois, Minnesota, Wisconsin, Connecticut, Maine, Massachusetts, Michigan, New Jersey, New York, Ohio, Pennsylvania, Rhode I., Vermont, West Virginia, Maryland · regions are the level-3 units of the World Geographical Scheme for Recording Plant Distributions, as Kew's World Checklist records ranges, some under historical names such as Yugoslavia or Czechoslovakia (how).
Map marker49.32, 11.37 · in the densest population, 1066 records (59% of those in range)
Extinct inSweden · recorded as extinct by WCVP: history, not habitat; no records are tested against these regions
Kew's description“perennial” · “temperate” · quoted from WCVP, RBG Kew (CC BY 4.0); not derived here
Evidence usedThe map marker rests on all 1796 georeferenced records inside the native range; the climate across the range on the 1445 of them in the land cells it reads, of 1446 placed to within 10 km; the map shows only the 1385 openly licensed ones, which alone would put the marker 31 km away. 25 records outside the WCVP native range not used. 350 in-range records are placed to worse than 10 km, or with no stated accuracy (admitted only as a person's observation to three decimals), and stay on the map but off the climate.
How this section is made
The map marker: the openly licensed record nearest the middle of the densest 1° population inside the densest 4° block of the 1796 in-range records; it decides nothing. Records outside the native range, living specimens and records marked introduced are not used; which records count.

Photographs

Ajuga genevensis, photograph 1did not loadAjuga genevensis, photograph 2did not loadAjuga genevensis, photograph 3did not loadAjuga genevensis, photograph 4did not loadAjuga genevensis, photograph 5did not loadAjuga genevensis, photograph 6did not load

Photographs: (c) Edmundas Greimas, some rights reserved (CC BY) (2); (c) Quinten Wiegersma, some rights reserved (CC BY) (3); (c) Tatyana Davidova, some rights reserved (CC BY).

Similar habitat climate The 6 nearest by mean daily high, mean nightly low and rain, month by month. How.

Erysimum odoratum Erysimum odoratum Smelly wallflower Photo: CC BY, BellsproutVincetoxicum hirundinaria Vincetoxicum hirundinaria White swallow-wort Photo: CC BY, Мирослав СоболевSilene nutans Silene nutans Nottingham catchfly Photo: CC BY, Сергей ГолубевGalium glaucum Galium glaucum Waxy bedstraw Photo: CC BY, Katrin SimonPlantago media Plantago media Hoary plantain Photo: CC0, author not statedVerbascum lychnitis Verbascum lychnitis White mullein Photo: CC BY, Мирослав Соболев

Other Ajuga 14 in the reference

Ajuga australis Ajuga australis Australian bugle Photo: CC BY, swainsona1Ajuga chamaepitys Ajuga chamaepitys Ground-pine Photo: CC BY, Cristian BadoiuAjuga ciliata Ajuga ciliata Lamiaceae Photo: CC BY-SA, Qwert1234Ajuga decumbens Ajuga decumbens Decumbent bugle Photo: CC BY, mami_t_tAjuga dictyocarpa Ajuga dictyocarpa Lamiaceae Photo: CC BY-SA, 許文俊Ajuga iva Ajuga iva Southern Bugle Photo: CC BY, Antoine ThivolleAjuga lupulina Ajuga lupulina Lamiaceae Photo: CC BY, Wang.QGAjuga multiflora Ajuga multiflora Korean pyramid bugle Photo: CC BY, Tatyana PetrenkoAjuga nipponensis Ajuga nipponensis Pink-flower bugleweed Photo: CC BY, WATANABE Hitoshi 渡辺仁Ajuga ophrydis Ajuga ophrydis Bugle Plant Photo: CC BY-SA, Nicola van BerkelAjuga pygmaea Ajuga pygmaea Taiwan Bugle Photo: CC BY, Francisca WuAjuga pyramidalis Ajuga pyramidalis Pyramidal bugle Photo: CC BY, Antoine Thivolle all 15 ›

Names & registers

Also known as Ajuga alpestris; Ajuga alpicola; Ajuga alpina; Ajuga astolonosa; Ajuga cryptostylon and 28 more. (GBIF Backbone)

Under another author Ajuga pyramidalis M.Bieb. is an older name of this species, not Ajuga pyramidalis, a species of the reference. (GBIF Backbone)

GBIFPOWOIPNIWFOWikidataWikipediaiNaturalist

The record

Family
Lamiaceae
Described by
L.
Native to
Austria, Belgium, Czechoslovakia +24
Wild records
1796 in range · 1385 open

Every figure here is derived from public data by a stated rule and names its source; nothing about this species is written for its page by a person or by AI, apart from the marked, credited quotations. How →

Where this page came from built 2026-10-21
GBIF species record gbif.species answeredasked 2026-10-21
GBIF synonyms gbif.synonyms answeredasked 2026-10-21
GBIF common names gbif.vernacular answeredasked 2026-10-21names fetched 2026-10-21
WCVP native range wcvp.distribution answeredas of 2026-06-04
GBIF occurrence records gbif.occurrences answeredas of 2026-10-21GBIF occurrence download https://doi.org/10.15468/dl.hbdw64, of 2026-10-21; 21 records within 1 km of a botanic garden, herbarium or zoo left out (17 at a botanic garden or arboretum, 4 at a zoo; Wikidata's list)
Habitat climate climate answeredasked 2026-10-21
Daily extremes (NASA POWER) climate.extremes answeredasked 2026-10-21NASA POWER (MERRA-2) daily 1981–2024, cell 45.00_4.375, lapse-corrected +329 m at 6.5 °C/km
Wikidata wikidata answeredasked 2026-10-21
Wikipedia wikipedia answeredasked 2026-10-21
iNaturalist photographs, wild inat.photos.wild answeredasked 2026-10-22from iNaturalist's open data of 2026-09-27: research-grade observations with an open-licence photograph, the 24 whose photographs iNaturalist received last (the open data holds no votes); filled 2026-10-22
iNaturalist photographs, cultivated inat.photos.cultivated not asked
GBIF media gbif.media answeredasked 2026-10-21
OpenAlex papers openalex not askednot yet asked for this reference; a later fill takes the papers from OpenAlex's snapshot

Every source is recorded as having answered, reported nothing, refused, failed, not been asked, or answered twice where one answer is taken (“not taken: two items answered”), and, for a source asked when this page was built, when: the figures are as the source held them that day; a source read from a file (Kew's World Checklist, a GBIF download) says "as of" the file's day instead; a row carried from an earlier build of the page names that build instead. Only “nothing to report” is ever shown as an absence. Records came from 181 datasets via GBIF.org; each carries its own licence.

Cultifolio

Opening your plants…