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Arum megobrebi; photograph Vladimír Fuka, CC BY, iNaturalist via GBIF CC BYVladimír Fuka, CC BY, iNaturalist via GBIF

Arum megobrebi Lobin, M.Neumann, Bogner & P.C.Boyce

Araceae · Transcaucasus, Turkey

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Arum megobrebi, photograph Vladimír Fuka, CC BY, iNaturalist via GBIFArum megobrebi, photograph Dmitry Ivanov, CC BY, iNaturalist via GBIFArum megobrebi, photograph ks1v, CC0, iNaturalist via GBIFArum megobrebi, photograph Anastasiia Samokhvalova, CC BY, iNaturalist via GBIFArum megobrebi, photograph Anastasiia Samokhvalova, CC BY, iNaturalist via GBIFArum megobrebi, photograph Anastasiia Samokhvalova, CC BY, iNaturalist via GBIF 11 photographs ›
Habitat figures
Cold floor (1 night in 100)
-14.2°C
Record low -23.1 °C in 44 years, at a typical spot in the range NASA POWER
Warmest month, mean daily high
24°C
Jul and Aug at the habitat CHELSA
Rain a year (median across the range)
1,209mm
12 months of 25 mm or more in the median year CHELSA
Open-sky light
11–37DLI
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.

About the genus · Arum

Arum is a genus of flowering plants in the family Araceae. They are native to Europe, northern Africa, and western and central Asia, with the highest species diversity in the Mediterranean region. Frequently called arum lilies, they are not closely related to the true lilies Lilium. More on Wikipedia ›

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

Cultivation

Seasons

The rain rule reads no short rainy season: 70% of the median year's rain (842 mm of 1,151 mm) takes 8 months, March to October. Mean temperature moves 22.7 °C between the warmest and coldest month. Months are the habitat's, northern hemisphere; shifted six months for a southern-hemisphere collection: September to April.

Rain

1,151 mm in the median year at the habitat, 842 mm of it March to October. Wettest month June at 127 mm, driest months (2 at 72 mm). Across the grid cells of the range the year's total runs 736 mm to 3,083 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 1,209 mm, is the year's rain at the top of the page; the 1,151 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: 11 to 37 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 10, the highest 90th-percentile month 40).

Warmth and air
Temperature

Coldest: the 1st-percentile night over 44 years at a typical spot in the range is -14.2 °C, the absolute minimum -23.1 °C, 5,405 frost nights in 44 years, 122.8 a year (NASA POWER daily minima). Warmest: the 99th-percentile day is 32.4 °C. Monthly means: the coldest month's mean nightly low -6.8 °C in January (across the grid cells of the range -10.5 °C to -1.3 °C), the warmest month's mean daily high 23.6 °C in July and August (median year across the grid cells of the range, CHELSA). Cold floor: -14.2 °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: 60 to 65% 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 -629 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 Arum megobrebi through the yearWarmest months July and August, mean daily high 24 °C; coldest month January, mean nightly low -6.8 °C; 1,151 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°frost32.4° 99th-percentile day, NASA POWER-23.1° lowest night in 44 years, NASA POWER°C · day and nightcold quarter0100200300400mm rainDLI 11–37RH 60–65%JanFebMarAprMayJunJulAugSepOctNovDec
day night rain medians and 10th–90th percentile across 33 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 °C2 / -2–63 / -1–76 / 3–1112 / 9–1717 / 14–2120 / 17–2424 / 20–2724 / 20–2720 / 17–2415 / 12–208 / 5–133 / 0–8
Night °C-7 / -11–-1-7 / -10–-1-3 / -6–22 / -1–77 / 4–1211 / 8–1615 / 12–1915 / 12–1911 / 8–156 / 3–110 / -3–5-5 / -8–1
Rain mm72 / 27–28773 / 37–24097 / 50–21297 / 80–146118 / 99–170127 / 98–20099 / 65–20698 / 57–26193 / 46–344113 / 64–36692 / 48–37872 / 27–323
DLI13 / 12–1819 / 18–2426 / 25–3132 / 30–3535 / 34–3737 / 35–4036 / 32–4033 / 30–3627 / 24–2920 / 17–2213 / 12–1711 / 10–15
RH %60 / 57–6360 / 59–6361 / 59–6361 / 59–6363 / 59–6664 / 56–6764 / 55–7164 / 55–7165 / 57–6763 / 59–6561 / 58–6360 / 57–63
How this section is made
Each figure is the median across the 33 grid cells holding the 51 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 963:4527 (41.825, 46.375). Over 44 years there: absolute minimum -23.1 °C, 1st-percentile night -14.2 °C, 99th-percentile day 32.4 °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 33 distinct grid cells holding 51 of the 51 in-range records; extremes and elevation at the typical cell 963:4527 (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 42.00_46.250, lapse-corrected -629 m at 6.5 °C/km. Elevation: ETOPO 2022, 1153 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.
NativeTranscaucasus, Turkey · 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 marker40.807, 44.89 · in the densest population, 32 records (57% of those in range)
Kew's description“tuberous geophyte” · “temperate” · quoted from WCVP, RBG Kew (CC BY 4.0); not derived here
Evidence usedThe map marker rests on all 56 georeferenced records inside the native range; the climate across the range on the 51 of them placed to within 10 km; the map shows only the 13 openly licensed ones, which alone would put the marker 108 km away. 5 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 56 in-range records; it decides nothing. Records outside the native range, living specimens and records marked introduced are not used; which records count.

Photographs

Arum megobrebi, photograph 1did not loadArum megobrebi, photograph 2did not loadArum megobrebi, photograph 3did not loadArum megobrebi, photograph 4did not loadArum megobrebi, photograph 5did not loadArum megobrebi, photograph 6did not load

Photographs: Vladimír Fuka, CC BY, iNaturalist via GBIF; Dmitry Ivanov, CC BY, iNaturalist via GBIF; ks1v, CC0, iNaturalist via GBIF; Anastasiia Samokhvalova, CC BY, iNaturalist via GBIF (3).

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

Pimpinella tripartita Pimpinella tripartita Apiaceae Photo: CC BY, Илья РуденкоPachyphragma macrophyllum Pachyphragma macrophyllum Caucasian Penny-cress Photo: CC BY, Илья РуденкоVeronica liwanensis Veronica liwanensis Plantaginaceae Photo: CC BY, Todd BolandTanacetum partheniifolium Tanacetum partheniifolium Asteraceae Photo: CC BY, Алена РучкаSpiranthes arcisepala Spiranthes arcisepala Appalachian ladies'-tresses Photo: CC BY, Mike ZifkinPolygonatum glaberrimum Polygonatum glaberrimum Asparagaceae Photo: CC BY, Наталья Пикалова

Other Arum 19 in the reference

Arum apulum Arum apulum Apulian lords and ladies Photo: CC BY, Leonardo AncillottoArum besserianum Arum besserianum Araceae Photo: CC BY, Galyna MykytynetsArum concinnatum Arum concinnatum Elaborated Arum Photo: CC BY, Andre HosperArum creticum Arum creticum Cretan Arum Photo: CC BY, Eleftherios KatsillisArum cylindraceum Arum cylindraceum Mountain Arum Photo: CC BY, dachsise Arum cyrenaicum Araceae Arum dioscoridis Arum dioscoridis Dioscorides Arum Photo: CC BY, Dena Arum euxinum Black Sea Arum Arum hygrophilum Arum hygrophilum Water Arum Photo: CC BY, zebedeugalinhaArum idaeum Arum idaeum Araceae Photo: CC BY, fmunozArum italicum Arum italicum Italian lords-and-ladies Photo: CC BY, zebedeugalinhaArum korolkowii Arum korolkowii Korolkov’s arum Photo: CC0, author not stated all 20 ›

Names & registers

GBIFPOWOIPNIWFOWikidata

The record

Family
Araceae
Described by
Lobin, M.Neumann, Bogner & P.C.Boyce
Native to
Transcaucasus, Turkey
Wild records
56 in range · 13 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; 1 record within 1 km of a botanic garden, herbarium or zoo left out (1 at a botanic garden or arboretum; 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 42.00_46.250, lapse-corrected -629 m at 6.5 °C/km
Wikidata wikidata answeredasked 2026-10-21
Wikipedia wikipedia nothing to reportasked 2026-10-21
iNaturalist taxon inat.taxon not asked
iNaturalist photographs, wild inat.photos.wild not asked
iNaturalist photographs, cultivated inat.photos.cultivated not asked
GBIF media gbif.media answeredasked 2026-10-21
Wikimedia Commons commons nothing to reportasked 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 6 datasets via GBIF.org; each carries its own licence.

Cultifolio

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