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An example collection, so you can see what this page does. Nothing added here is kept: leaving deletes it.
Geranium yeoi; photograph (c) Jon Sullivan, some rights reserved (CC BY) CC BY(c) Jon Sullivan, some rights reserved (CC BY) · observed growing wild · 2026-04-25

Geranium yeoi Aedo & Muñoz Garm.

Greater herb robert

Geraniaceae · Madeira

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Geranium yeoi, photograph (c) Ryan Donnelly, some rights reserved (CC BY)Geranium yeoi, photograph (c) Ryan Donnelly, some rights reserved (CC BY)Geranium yeoi, photograph author not stated, no rights reservedGeranium yeoi, photograph (c) Rob Felix, some rights reserved (CC BY)Geranium yeoi, photograph (c) Brook, some rights reserved (CC BY)Geranium yeoi, photograph (c) kiwialli, some rights reserved (CC BY) 94 photographs ›
Habitat figures
Coldest month, mean nightly low
10.4°C
Feb at the habitat, not a floor; extremes not used (sea cell) CHELSA
Warmest month, mean daily high
22°C
Jul and Aug at the habitat CHELSA
Rain a year (median across the range)
2,388mm
11 months of 25 mm or more in the median year CHELSA
Open-sky light
14–47DLI
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
Wet winters: the rain comes October to March, read as a winter growing season. rain rule, CHELSA
Northern hemisphere unless you set your site. The chart is in the habitat's months.

About the genus · Geranium

Geranium is a genus of 422 species of annual, biennial, and perennial plants that are commonly known as geraniums, hardy geraniums, or cranesbills. They are found throughout the temperate regions of the world and the mountains of the tropics, with the greatest diversity in the eastern part of the Mediterranean region.

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

Cultivation

Seasons

The rain rule reads a winter growing season: 70% of the median year's rain (1,814 mm of 2,381 mm) falls in October to March, cooler than the year (wet-season mean 13.7 °C against a yearly mean of 15.5 °C). Months are the habitat's, northern hemisphere; shifted six months for a southern-hemisphere collection: April to September.

Rain

2,381 mm in the median year at the habitat, 1,814 mm of it October to March. Wettest month December at 397 mm, driest month July at 21 mm. Across the grid cells of the range the year's total runs 1,980 mm to 2,792 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 2,388 mm, is the year's rain at the top of the page; the 2,381 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: 14 to 47 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 13, the highest 90th-percentile month 47).

Warmth and air
Temperature

Monthly means: the coldest month's mean nightly low 10.4 °C in February (across the grid cells of the range 8.5 °C to 11.6 °C), the warmest month's mean daily high 22.4 °C in August (median year across the grid cells of the range, CHELSA). Cold floor: none read. The nearest figure is 10.4 °C, the coldest month's mean nightly low, February, in the median year (CHELSA); a month's mean of its nightly lows is warmer than the nights a floor is read from. The daily extremes were read at a weather cell that is mostly sea and are not used.

Humidity

Relative humidity at the habitat: 62 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. CHELSA monthly means, median year across the grid cells of the range. No cold floor is read without a daily extremes series; the coldest month's mean nightly low named in its sentence is not one. 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 Geranium yeoi through the yearWarmest months July and August, mean daily high 22 °C; coldest month February, mean nightly low 10.4 °C; 2,381 mm of rain in the median year (the twelve monthly medians added). Medians across the range, from CHELSA. Habitat months, northern hemisphere.5°10°15°20°25°°C · day and nightcold quarter0100200300400500mm rainDLI 14–47RH 62–67%JanFebMarAprMayJunJulAugSepOctNovDec
day night rain medians and 10th–90th percentile across 9 habitat cells, CHELSA cold quarter: the three months around the coldest month's mean nightly low DLI, mol/m²/dayRH %each on its own scale
Figures by month
JanFebMarAprMayJunJulAugSepOctNovDec
Day °C14 / 11–1513 / 11–1514 / 13–1514 / 13–1616 / 15–1719 / 19–2022 / 22–2322 / 22–2320 / 19–2218 / 17–2016 / 14–1714 / 12–16
Night °C11 / 9–1210 / 9–1211 / 9–1211 / 9–1213 / 11–1415 / 15–1618 / 18–1818 / 18–1917 / 16–1816 / 14–1713 / 11–1512 / 10–13
Rain mm280 / 232–328289 / 240–334243 / 198–287199 / 162–239118 / 97–13665 / 52–7021 / 19–2429 / 25–33135 / 112–146278 / 233–321327 / 271–392397 / 322–491
DLI16 / 15–1822 / 21–2430 / 29–3236 / 36–3842 / 42–4345 / 45–4647 / 46–4742 / 41–4333 / 32–3524 / 23–2618 / 16–1914 / 13–16
RH %65 / 64–6764 / 63–6763 / 60–6565 / 63–6765 / 63–6864 / 60–6762 / 55–6663 / 58–6665 / 63–6767 / 65–6966 / 64–6767 / 65–69

The daily extremes were read at a NASA POWER cell that is 12% land: neither it nor the next candidates whose coldest month's mean nightly low is within 2 °C of the median across cells sit in a POWER cell that is mostly land, and the rule reads a cold floor only from a cell that is mostly land, so none is read for this species. Nor is the coldest month's mean nightly low taken as one: it is a mean of a month's lows, not its coldest night. What that cell gave over 44 years: absolute minimum 7.5 °C, 1st-percentile night 10.4 °C, 99th-percentile day 20.5 °C.

How this section is made
Each figure is the median across the 9 grid cells holding the 22 in-range records, 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 1144:3259 (32.775, -17.025). 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 9 distinct grid cells holding 22 of the 22 in-range records; extremes and elevation at the typical cell 1144:3259 (its coldest month's mean nightly low nearest the median across cells, though its NASA POWER cell is only 12% land and none of the 6 next candidates within 2 °C of the median was mostly land); its position is the cell centre. Extremes: NASA POWER (MERRA-2) daily 1981–2024, cell 33.00_-16.875, lapse-corrected +637 m at 6.5 °C/km. Elevation: ETOPO 2022, 666 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.
NativeMadeira · introduced: Great Britain, Ireland, France, South Australia, Tasmania, New Zealand North, New Zealand South, California · 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 marker32.783, -16.907 · in the densest population, 29 records (100% of those in range)
Kew's description“biennial” · “subtropical” · quoted from WCVP, RBG Kew (CC BY 4.0); not derived here
Evidence usedThe map marker rests on all 29 georeferenced records inside the native range; the climate across the range on the 22 of them placed to within 10 km; the map shows only the 15 openly licensed ones, which alone would put the marker in the same place. 379 records outside the WCVP native range not used. 7 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 of the 29 in-range records; it decides nothing. Records outside the native range, living specimens and records marked introduced are not used; which records count.

Photographs

Geranium yeoi, photograph 1did not loadGeranium yeoi, photograph 2did not loadGeranium yeoi, photograph 3did not loadGeranium yeoi, photograph 4did not loadGeranium yeoi, photograph 5did not loadGeranium yeoi, photograph 6did not load

Photographs: (c) Ryan Donnelly, some rights reserved (CC BY) (2); author not stated, no rights reserved · CC0; (c) Rob Felix, some rights reserved (CC BY); (c) Brook, some rights reserved (CC BY); (c) kiwialli, some rights reserved (CC BY).

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

Musschia wollastonii Musschia wollastonii Campanulaceae Photo: CC BY, Rachael KaiserDigitalis sceptrum Digitalis sceptrum Madeira foxglove Photo: CC BY, fmunozArgyranthemum dissectum Argyranthemum dissectum Asteraceae Photo: CC BY, Vítor JorgeDactylorhiza foliosa Dactylorhiza foliosa Richly-Leaved Dactylorhiza Photo: CC BY, Paul DufourGeranium palmatum Geranium palmatum Canary Island geranium Photo: CC BY, Rob FelixRuscus streptophyllus Ruscus streptophyllus Asparagaceae Photo: CC BY, Leonardo Ancillotto

Other Geranium 106 in the reference

Geranium albanum Geranium albanum Geraniaceae Photo: CC BY-SA, Tom RiggleGeranium albiflorum Geranium albiflorum Geraniaceae Photo: CC BY, Alexander DubyninGeranium alboroseum Geranium alboroseum Geraniaceae Photo: CC BY, Thomas GyselinckGeranium argenteum Geranium argenteum Geraniaceae Photo: CC BY, Elias Geranium aristatum Geraniaceae Geranium asphodeloides Geranium asphodeloides Geraniaceae Photo: CC BY, Milan ChytrýGeranium bicknellii Geranium bicknellii Bicknell's cranesbill Photo: CC BY, Patrick JacksonGeranium bohemicum Geranium bohemicum Geraniaceae Photo: CC BY, Tatyana SovaGeranium brevicaule Geranium brevicaule Alpine Crane's Bill Photo: CC BY, Felix CollinsGeranium caespitosum Geranium caespitosum Pineywoods geranium Photo: CC0, author not statedGeranium carolinianum Geranium carolinianum Carolina crane's-bill Photo: CC0, author not statedGeranium cataractarum Geranium cataractarum Geraniaceae Photo: CC BY, Rafael Medina all 107 ›

Names & registers

Also known as Geranium rubescens. (GBIF Backbone)

GBIFPOWOIPNIWFOWikidataiNaturalist

The record

Family
Geraniaceae
Described by
Aedo & Muñoz Garm.
Native to
Madeira
Wild records
29 in range · 15 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 2026-10-22
GBIF species record gbif.species answeredasked 2026-10-22
GBIF synonyms gbif.synonyms answeredasked 2026-10-22
GBIF common names gbif.vernacular answeredasked 2026-10-22names fetched 2026-10-22
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; 68 records within 1 km of a botanic garden, herbarium or zoo left out (61 at a botanic garden or arboretum, 4 at a herbarium, 3 at a zoo; Wikidata's list)
Habitat climate climate answeredasked 2026-10-22
Daily extremes (NASA POWER) climate.extremes answeredasked 2026-10-22NASA POWER (MERRA-2) daily 1981–2024, cell 33.00_-16.875, lapse-corrected +637 m at 6.5 °C/km; read, and set aside: NASA POWER's cell is mostly sea (12% land), so no cold floor is shown
Wikidata wikidata answeredasked 2026-10-22
Wikipedia wikipedia nothing to reportasked 2026-10-22
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 2026-10-22
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 28 datasets via GBIF.org; each carries its own licence.

Cultifolio

Opening your plants…