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Convolvulus scoparius; photograph Martin Jung, CC BY, iNaturalist via GBIF CC BYMartin Jung, CC BY, iNaturalist via GBIF

Convolvulus scoparius L.f.

Lignum rhodium; Rhodium-wood; Lena Noel

Convolvulaceae · Canary Is.

Cited as Kew's World Checklist cites it, Convolvulus scoparius L.f.: GBIF's backbone key for this page carries the name with another author, L.fil.

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Convolvulus scoparius, photograph Martin Jung, CC BY, iNaturalist via GBIFConvolvulus scoparius, photograph Krzysztof Ziarnek, Kenraiz, CC BY-SA 3.0, via Wikimedia CommonsConvolvulus scoparius, photograph Krzysztof Ziarnek, Kenraiz, CC BY-SA 3.0, via Wikimedia CommonsConvolvulus scoparius, photograph Krzysztof Ziarnek, Kenraiz, CC BY-SA 3.0, via Wikimedia Commons 5 photographs ›
Habitat figures
Cold floor (1 night in 100)
13.4°C
Record low 11.2 °C in 44 years, at a typical spot in the range NASA POWER
Warmest month, mean daily high
23°C
Jul, Aug and Sep at the habitat CHELSA
Rain a year (median across the range)
422mm
6 months of 25 mm or more in the median year CHELSA
Open-sky light
23–49DLI
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 November 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 · 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 (337 mm of 428 mm) falls in November to March, cooler than the year (wet-season mean 16.0 °C against a yearly mean of 18.0 °C). Months are the habitat's, northern hemisphere; shifted six months for a southern-hemisphere collection: May to September.

Rain

428 mm in the median year at the habitat, 337 mm of it November to March. Wettest month December at 96 mm, driest month July at 1 mm; 3 months under 5 mm. Across the grid cells of the range the year's total runs 325 mm to 702 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 422 mm, is the year's rain at the top of the page; the 428 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: 23 to 49 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 19, the highest 90th-percentile month 50).

Warmth and air
Temperature

Coldest: the 1st-percentile night over 44 years at a typical spot in the range is 13.4 °C, the absolute minimum 11.2 °C, no frost in 44 years (NASA POWER daily minima). Warmest: the 99th-percentile day is 24.3 °C. Monthly means: the coldest month's mean nightly low 13.9 °C in February (across the grid cells of the range 10.5 °C to 16.5 °C), the warmest month's mean daily high 23.1 °C in August (median year across the grid cells of the range, CHELSA). Cold floor: 13.4 °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: 56 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 +267 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 scoparius through the yearWarmest months July, August and September, mean daily high 23 °C; coldest month February, mean nightly low 13.9 °C; 428 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.5°10°15°20°25°30°24.3° 99th-percentile day, NASA POWER11.2° lowest night in 44 years, NASA POWER°C · day and nightcold quarter050100150200mm rainDLI 23–49RH 56–61%JanFebMarAprMayJunJulAugSepOctNovDec
day night rain medians and 10th–90th percentile across 48 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 °C16 / 13–1817 / 13–1817 / 14–1918 / 14–1919 / 16–2021 / 19–2223 / 22–2523 / 22–2523 / 21–2422 / 18–2320 / 15–2118 / 14–19
Night °C14 / 11–1714 / 11–1714 / 11–1715 / 12–1716 / 14–1818 / 16–2019 / 18–2220 / 19–2220 / 18–2219 / 16–2117 / 13–2015 / 12–18
Rain mm57 / 44–9264 / 51–10649 / 35–7823 / 16–418 / 5–153 / 1–51 / 0–33 / 1–512 / 6–1941 / 29–7871 / 55–11396 / 67–159
DLI25 / 21–2831 / 27–3339 / 35–4144 / 42–4547 / 46–4949 / 48–5048 / 47–4946 / 44–4640 / 38–4133 / 29–3526 / 22–2923 / 19–25
RH %59 / 54–6259 / 53–6258 / 51–6160 / 54–6360 / 53–6459 / 48–6556 / 40–6457 / 42–6459 / 50–6561 / 56–6560 / 56–6361 / 58–64
How this section is made
Each figure is the median across the 48 grid cells on land that hold in-range records (78 records in those cells; 4 more cells hold records but no land by the elevation layer, so those records sit at sea and the cells are 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 1243:3286 (27.825, -15.675). Over 44 years there: absolute minimum 11.2 °C, 1st-percentile night 13.4 °C, 99th-percentile day 24.3 °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 48 distinct grid cells holding 78 of the 82 in-range records (4 further cells with records at sea, by the elevation layer, left out); extremes and elevation at the typical cell 1243:3286 (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 28.00_-15.625, lapse-corrected +267 m at 6.5 °C/km. Elevation: ETOPO 2022, 376 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.
NativeCanary Is. · 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 marker28.138, -16.703 · in the densest population, 91 records (97% of those in range)
Kew's description“shrub” · “subtropical” · quoted from WCVP, RBG Kew (CC BY 4.0); not derived here
Evidence usedThe map marker rests on all 94 georeferenced records inside the native range; the climate across the range on the 78 of them in the land cells it reads, of 82 placed to within 10 km; the map shows only the 14 openly licensed ones, which alone would put the marker 26 km away. 12 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 94 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 scoparius, photograph 1did not loadConvolvulus scoparius, photograph 2did not loadConvolvulus scoparius, photograph 3did not loadConvolvulus scoparius, photograph 4did not load

Photographs: Martin Jung, CC BY, iNaturalist via GBIF; Krzysztof Ziarnek, Kenraiz, CC BY-SA 3.0, via Wikimedia Commons (3).

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

Pancratium canariense Pancratium canariense Canary Sea Daffodil Photo: CC BY, Wolfgang ThomasArtemisia thuscula Artemisia thuscula Canary Island wormwood Photo: CC BY, Daniel Heras GonzálezMalva acerifolia Malva acerifolia Canary tree mallow Photo: CC BY, Daniel CahenRubia fruticosa Rubia fruticosa Rubiaceae Photo: CC BY, Daniel Heras GonzálezLavandula canariensis Lavandula canariensis Canary Island Lavender Photo: CC BY, jeanjacquesgodonAllagopappus canariensis Allagopappus canariensis Asteraceae Photo: CC0, author not stated

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 Breweria scoparia; Convolvulus benehoavensis; Rhodorhiza scoparia; Rhodoxylon scoparium; Teline benehoavensis. (GBIF Backbone)

Kew accepts as species of their own Genista benehoavensis: older names in GBIF's record of this species that Kew's World Checklist accepts as other species. (WCVP, RBG Kew, file of 2026-06-04)

GBIFPOWOIPNIWFOWikidata

The record

Family
Convolvulaceae
Described by
L.f.
Native to
Canary Is.
Wild records
94 in range · 14 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 2026-10-21GBIF's key 7668580 is Convolvulus scoparius L.fil.; the page links Kew's Convolvulus scoparius L.f., and the name is cited as Kew cites it
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
Habitat climate climate answeredasked 2026-10-21
Daily extremes (NASA POWER) climate.extremes answeredasked 2026-10-21NASA POWER (MERRA-2) daily 1981–2024, cell 28.00_-15.625, lapse-corrected +267 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 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 19 datasets via GBIF.org; each carries its own licence.

Cultifolio

Opening your plants…