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Convolvulus humilis; photograph Mehdi Chetibi, CC BY, iNaturalist via GBIF CC BYMehdi Chetibi, CC BY, iNaturalist via GBIF

Convolvulus humilis Jacq.

Convolvulaceae · Portugal, Spain +10

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Convolvulus humilis, photograph Mehdi Chetibi, CC BY, iNaturalist via GBIFConvolvulus humilis, photograph Mehdi Chetibi, CC BY, iNaturalist via GBIFConvolvulus humilis, photograph Abdenour Kheloufi, CC BY, iNaturalist via GBIFConvolvulus humilis, photograph Karim Haddad, CC BY, iNaturalist via GBIFConvolvulus humilis, photograph Karim Haddad, CC BY, iNaturalist via GBIFConvolvulus humilis, photograph Karim Haddad, CC BY, iNaturalist via GBIF 24 photographs ›
Habitat figures
Cold floor (1 night in 100)
-2.9°C
Record low -7.3 °C in 44 years, at a typical spot in the range NASA POWER
Warmest month, mean daily high
32°C
Jul at the habitat CHELSA
Rain a year (median across the range)
575mm
9 months of 25 mm or more in the median year CHELSA
Open-sky light
14–50DLI
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 February and April, 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 · Convolvulus

Convolvulus is a genus of about 200 to 250 species of flowering plants in the bindweed family Convolvulaceae, with a cosmopolitan distribution; the Plants of the World Online database currently accepts 227 species and 12 natural hybrids. Common names include bindweed and morning glory; both are names shared with other closely related genera.

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

Cultivation

Seasons

The rain rule reads a winter growing season: 70% of the median year's rain (419 mm of 565 mm) falls in October to February and April, cooler than the year (wet-season mean 12.0 °C against a yearly mean of 16.4 °C). Months are the habitat's, northern hemisphere; shifted six months for a southern-hemisphere collection: April to August and October.

Rain

565 mm in the median year at the habitat, 419 mm of it October to February and April. Wettest month December at 98 mm, driest month July at 3 mm; 1 month under 5 mm. Across the grid cells of the range the year's total runs 398 mm to 795 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 575 mm, is the year's rain at the top of the page; the 565 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 50 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 12, the highest 90th-percentile month 51).

Warmth and air
Temperature

Coldest: the 1st-percentile night over 44 years at a typical spot in the range is -2.9 °C, the absolute minimum -7.3 °C, 751 frost nights in 44 years, 17.1 a year (NASA POWER daily minima). Warmest: the 99th-percentile day is 37.8 °C. Monthly means: the coldest month's mean nightly low 3.7 °C in January (across the grid cells of the range -0.5 °C to 6.8 °C), the warmest month's mean daily high 31.6 °C in July (median year across the grid cells of the range, CHELSA). Cold floor: -2.9 °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: 49 to 61% 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 +204 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 Convolvulus humilis through the yearWarmest month July, mean daily high 32 °C; coldest month January, mean nightly low 3.7 °C; 565 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.-10°0°10°20°30°40°frost37.8° 99th-percentile day, NASA POWER-7.3° lowest night in 44 years, NASA POWER°C · day and nightcold quarter050100150200mm rainDLI 14–50RH 49–61%JanFebMarAprMayJunJulAugSepOctNovDec
day night rain medians and 10th–90th percentile across 109 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 °C12 / 9–1514 / 10–1617 / 13–1919 / 15–2323 / 19–2728 / 24–3132 / 28–3331 / 28–3327 / 24–3022 / 18–2617 / 13–2013 / 9–17
Night °C4 / -1–75 / 0–77 / 2–98 / 4–1111 / 7–1515 / 12–1818 / 15–2118 / 15–2116 / 12–1912 / 8–178 / 4–125 / 1–9
Rain mm66 / 37–15458 / 36–12650 / 35–8458 / 25–8041 / 7–5314 / 1–293 / 1–97 / 1–1431 / 2–4060 / 24–8479 / 47–12298 / 43–156
DLI17 / 15–2023 / 21–2632 / 30–3439 / 36–4144 / 42–4749 / 48–5050 / 48–5145 / 43–4635 / 34–3825 / 23–2918 / 16–2214 / 12–18
RH %60 / 58–6259 / 57–6156 / 55–5956 / 53–5854 / 51–5751 / 49–5749 / 44–5750 / 46–5953 / 50–5957 / 55–6059 / 55–6161 / 58–63
How this section is made
Each figure is the median across the 109 grid cells holding the 135 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 1060:3496 (36.975, -5.175). Over 44 years there: absolute minimum -7.3 °C, 1st-percentile night -2.9 °C, 99th-percentile day 37.8 °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 109 distinct grid cells holding 135 of the 135 in-range records; extremes and elevation at the typical cell 1060:3496 (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 37.00_-5.000, lapse-corrected +204 m at 6.5 °C/km. Elevation: ETOPO 2022, 648 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.
NativePortugal, Spain, Italy, Sicilia, Algeria, Egypt, Libya, Morocco, Tunisia, Cyprus, Lebanon-Syria, Palestine · introduced: Germany · 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 marker37.56, -4.84 · in the densest population, 93 records (53% of those in range)
Kew's description“annual” · “subtropical” · quoted from WCVP, RBG Kew (CC BY 4.0); not derived here
Evidence usedThe map marker rests on all 174 georeferenced records inside the native range; the climate across the range on the 135 of them placed to within 10 km; the map shows only the 25 openly licensed ones, which alone would put the marker 981 km away. 1 record outside the WCVP native range not used. 39 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 2° block of the 174 in-range records; it decides nothing. Records outside the native range, living specimens and records marked introduced are not used; which records count.

Photographs

Convolvulus humilis, photograph 1did not loadConvolvulus humilis, photograph 2did not loadConvolvulus humilis, photograph 3did not loadConvolvulus humilis, photograph 4did not loadConvolvulus humilis, photograph 5did not loadConvolvulus humilis, photograph 6did not load

Photographs: Mehdi Chetibi, CC BY, iNaturalist via GBIF (2); Abdenour Kheloufi, CC BY, iNaturalist via GBIF; Karim Haddad, 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.

Echinops strigosus Echinops strigosus Rough-leaved Globe-thistle Photo: CC BY, Duarte FradeIris planifolia Iris planifolia Iridaceae Photo: CC BY, Victoria J. BurtonDiplotaxis catholica Diplotaxis catholica Brassicaceae Photo: CC BY, Barry StewartPyrus bourgaeana Pyrus bourgaeana Iberian pear Photo: CC BY, Barry StewartMagydaris panacifolia Magydaris panacifolia Apiaceae Photo: CC BY, Duarte FradeFlueggea tinctoria Flueggea tinctoria Tamujo Photo: CC BY, Duarte Frade

Other Convolvulus 45 in the reference

Convolvulus althaeoides Convolvulus althaeoides Mallow-leaved Bindweed Photo: CC BY, Vítor JorgeConvolvulus angustissimus Convolvulus angustissimus Blushing Bindweed Photo: CC BY, Roman SorokaConvolvulus arvensis Convolvulus arvensis Field bindweed Photo: CC BY, Vasco Henrique Oliveira FonsecaConvolvulus assyricus Convolvulus assyricus Convolvulaceae Photo: CC BY, Joey BomConvolvulus boissieri Convolvulus boissieri Convolvulaceae Photo: CC BY, Michael, Antoni and Nihat HinczewskiConvolvulus canariensis Convolvulus canariensis Convolvulaceae Photo: CC BY, Lídia CarreraConvolvulus cantabrica Convolvulus cantabrica Cantabrian Bindweed Photo: CC BY, Noé Fleury FrouartConvolvulus cneorum Convolvulus cneorum Silverbush Photo: CC0, author not stated Convolvulus collinus Convolvulaceae Convolvulus crenatifolius Convolvulus crenatifolius Convolvulaceae Photo: CC BY, Guillermo Huerta RamosConvolvulus × cyprius Convolvulus × cyprius Convolvulaceae Photo: CC BY, Denis OtkydachConvolvulus × despreauxii Convolvulus × despreauxii Convolvulaceae Photo: CC BY-SA, TED all 46 ›

Names & registers

Also known as Convolvulus ciliatus; Convolvulus decumbens; Convolvulus evolvuloides; Convolvulus strictus; Convolvulus undulatus and 1 more. (GBIF Backbone)

GBIFPOWOIPNIWFOWikidata

The record

Family
Convolvulaceae
Described by
Jacq.
Native to
Portugal, Spain, Italy +9
Wild records
174 in range · 25 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; 15 records within 1 km of a botanic garden, herbarium or zoo left out (15 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 37.00_-5.000, lapse-corrected +204 m at 6.5 °C/km
Wikidata wikidata answeredasked 2026-10-21found by its label; its POWO identifier 266365-1 is Kew's for Convolvulus humilis Jacq.
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
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 31 datasets via GBIF.org; each carries its own licence.

Cultifolio

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