Hedera algeriensis, Constantine, Algérie

Hedera algeriensis Hibberd

Algerian Ivy

Climate known 74 photographs

Every figure on this page is derived from public data by a stated rule and says its source; nothing here is written by a person or a model, except the Wikipedia passage, which is quoted and marked as such. How it is made.

Summary

Hedera algeriensis, the Algerian ivy, is a species of evergreen ivy native to the North African coast, including coastal mountains in Algeria.

Text from Wikipedia, “Hedera algeriensis”, CC BY-SA 4.0, quoted as written. Kept separate from everything derived here.

About the genus · Hedera

Hedera, commonly called ivy, is a genus of 12–15 species of evergreen climbing or ground-creeping woody plants in the family Araliaceae, native to Western Europe, Central Europe, Southern Europe, Macaronesia, northwestern Africa and across central-southern Asia east to Japan and Taiwan. Several species are cultivated as climbing ornamentals, and the name ivy especially denotes common ivy, known in North America as "English ivy", which is frequently planted to clothe brick walls.

Text from Wikipedia, “Hedera”, CC BY-SA 4.0, quoted as written.

Family

Araliaceae

Described by

Hibberd

Native to

Algeria, Tunisia

Wild records

60 in range· 39 open

At a glance

Warmest month

31°C

Aug, mean day; nights 19 °C (CHELSA)

Rain

751mm/yr

9 wet months · peak Dec 128 mm (CHELSA)

Light

14–48DLI

mol/m²/day, winter to summer, open sky (CHELSA shortwave)

In short condensed by rule from the cultivation cards · not written by a person

Rain rule: a winter growing season, October to March in the northern hemisphere (October to March at the habitat, northern). Habitat rain 751 mm a year, wettest December at 128 mm, driest July at 4 mm (habitat calendar, northern hemisphere). Open sky over the habitat: 14 to 48 mol/m²/day. Cold floor 0.3 °C (1st-percentile habitat night, NASA POWER).

Each sentence is one card's own one-line form, written by the same rule as the card (Its year, Rain, Light, Temperature); the note cannot say what a card does not. Months are given for the northern hemisphere (set your site in Settings to change this), and the habitat's own alongside. The cards · the figures.

Also known as Hedera algeriensis var. variegata (Paul) Paul; Hedera canariensis f. variegata (Paul) Verhaeghe; Hedera canariensis var. variegata (Paul) Schulze-Menz; Hedera grandifolia var. variegata (Paul) Hibberd.

Cultivation

Its year Rain rule: a winter growing season, October to March in the northern hemisphere (October to March at the habitat, northern).

This species’ habitat figures, and what two fixed rules read from them.

The rain rule reads a winter growing season: 70% of the year's rain (559 mm of 751 mm) falls in October to March, cooler than the year (wet-season mean 11.6 °C against a yearly mean of 16.3 °C). Months are the habitat's, northern hemisphere; shifted six months for a southern-hemisphere collection: April to September.

Read from the median year of CHELSA monthly rainfall and mean temperature across the envelope cells: 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 gives a season to reverse. A reading of the curves, not an observation of the plant.

Rain Habitat rain 751 mm a year, wettest December at 128 mm, driest July at 4 mm (habitat calendar, northern hemisphere).

This species’ habitat figures, with their source.

751 mm a year at the habitat, 559 mm of it October to March. Wettest month December at 128 mm, driest July at 4 mm; 1 month under 5 mm. Across the envelope cells the year's total runs 482 mm to 1032 mm (10th to 90th percentile of each cell's own year) (median year across the envelope cells, CHELSA; habitat calendar, northern hemisphere).

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

Light Open sky over the habitat: 14 to 48 mol/m²/day.

This species’ habitat figures, with their source.

Open sky over the habitat: 14 to 48 mol/m²/day across the year (daily light integral, median year across the envelope cells, CHELSA; the lowest 10th-percentile month across the cells is 13, the highest 90th-percentile month 48).

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.

Warmth and air Cold floor 0.3 °C (1st-percentile habitat night, NASA POWER).

This species’ habitat figures, with their source.

Temperature

Coldest: the 1st-percentile night over 44 years at the typical cell is 0.3 °C, the absolute minimum -3.3 °C, about 3 frost nights a year (NASA POWER daily minima). Warmest: the 99th-percentile day is 37.0 °C. Monthly means: coldest night 4.5 °C in January (across the envelope cells 0.3 °C to 8.9 °C), warmest day 30.8 °C in August (median year across the envelope cells, CHELSA). Cold floor: 0.3 °C, which is the 1st-percentile night over 44 years at the typical cell (NASA POWER).

NASA POWER daily minima and maxima 1981–2024 at the typical cell, lapse-corrected to its elevation; CHELSA monthly means, median year across the envelope cells, CHELSA. The cold floor is the figure named in its sentence. Not a measured survival limit for any plant in a pot.

Humidity

Relative humidity at the habitat: 50 to 61% across the year (monthly means, median year across the envelope cells, CHELSA). A figure about the air, saying nothing about how the plant takes water.

CHELSA relative humidity, median year across the envelope cells.

The figures the cards read from are in Climate below, and where they came from in Natural habitat.

Climate across the habitat

day night rain 10th–90th percentile across 44 habitat cells cold quarter: the three months around the coldest night extremes over 44 years at the typical cell, marked at the edge: undated DLI, mol/m²/dayRH %each on its own scale

Figures by month

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Day °C	12 / 10–15	13 / 11–16	16 / 13–18	18 / 16–20	22 / 20–24	27 / 24–29	31 / 27–33	31 / 28–33	27 / 25–29	23 / 20–25	17 / 14–19	13 / 11–16
Night °C	5 / 0–9	5 / 1–9	6 / 3–10	8 / 5–12	12 / 9–15	16 / 13–18	19 / 17–21	19 / 17–22	17 / 14–20	13 / 10–17	9 / 5–13	6 / 2–10
Rain mm	107 / 64–147	84 / 51–108	72 / 55–100	63 / 45–93	48 / 38–62	17 / 7–25	4 / 3–7	11 / 9–16	49 / 33–63	67 / 45–101	101 / 55–135	128 / 59–170
DLI	17 / 15–18	23 / 21–24	31 / 29–32	38 / 37–39	42 / 42–43	47 / 46–48	48 / 47–48	43 / 42–44	34 / 32–35	25 / 24–26	18 / 16–19	14 / 13–16
RH %	61 / 59–63	60 / 58–62	59 / 57–61	59 / 56–61	57 / 54–62	53 / 49–61	50 / 45–60	51 / 47–60	56 / 52–61	58 / 55–61	59 / 58–61	60 / 59–62

Each figure is the median across the 44 grid cells holding the 53 in-range records, with the 10th–90th percentile span across those cells after the slash where it differs. Extremes and elevation were read at the typical cell 1066:3712 (36.675, 5.625). Over 44 years there: absolute minimum -3.3 °C, 1st-percentile night 0.3 °C, 99th-percentile day 37.0 °C. Normals: CHELSA V2.1 1981–2010 climatology, 0.05° cells (each the mean of ~36 1 km pixels). Envelope: median and 10th–90th percentile of each month across the 44 distinct grid cells holding the 53 in-range records; extremes and elevation at the typical cell 1066:3712 (its coldest month's mean night nearest the median across cells); its position is the cell centre. Extremes: NASA POWER (MERRA-2) daily 1981–2024, cell 36.50_5.625, lapse-corrected +9 m at 6.5 °C/km. Elevation: ETOPO 2022, 727 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 every in-range record's cell, not at the marker.

Openly licensed records inside the range, framed on where they fall.

NativeAlgeria, Tunisia· introduced: Great Britain, Ireland, Belgium, France, Spain, Arizona, California, Florida

Kew's description“climber” · “temperate”· quoted from WCVP, RBG Kew (CC BY 4.0); not derived here

Map marker36.557, 5.891 · in the densest population, 31 records (52% of those in range)

Evidence usedThe map marker and the climate envelope rest on all 60 georeferenced records inside the native range; the map shows only the 39 openly licensed ones, which alone would put the marker 67 km away. 264 records outside the range (gardens, roadsides, misidentifications) ignored. 7 in-range records are placed to worse than 10 km and stay on the map but off the climate.

The map markerthe map marker: the openly licensed record nearest the middle of the densest 1° population of the 60 in-range records; it decides nothing.

Photographs

Photographs: (c) Karim Haddad, some rights reserved (CC BY) (2); (c) Henry Miller, some rights reserved (CC BY) (4); (c) Andrew Skotnicki, some rights reserved (CC BY) (2).

Photographs: iNaturalist did not answer when this page was built; what is shown came from the sources that did.

Papers naming this species

Works whose title or abstract names Hedera algeriensis, most cited first, from OpenAlex (CC0). A mention, not a cultivation source: nothing on this page is drawn from them.

Influence of Spray Application Technique on Spray Deposition in Greenhouse Ivy Pot Plants Grown on Hanging Shelves

Pascal Braekman, Dieter Foqué, Marie‐Christine Van Labeke, Jan Pieters (2009) · HortScience

Optimized Concentrations of Auxinic Rooting Promoters Improve Stem Cutting Propagation Efficiency and Morphophysiological Characteristics in Hedera algeriensis cv. Gloire de Marengo

Jae Hwan Lee, Samuel Lee, Sang Yong Nam (2025) · Horticultural Science and Technology

Thermographic Analysis of Green Wall and Green Roof Plant Types under Levels of Water Stress

Hisham Elkadi, Mahsa Seifhashemi, Rachel Lauwerijssen (2024) · Sustainability

The Latin name for Assam tea revisited and the further nomenclatural significance of the three editions of Julius Bosse's Vollständiges Handbuch der Blumengärtnerei – and contemporary compendia

D. J. Mabberley (2021) · Taxon

Occurrence Download