Example ⟳ +
An example collection, so you can see what this page does. Nothing added here is kept: leaving deletes it.
Coleonema calycinum; photograph (c) Nicola van Berkel, some rights reserved (CC BY-SA) CC BY-SA(c) Nicola van Berkel, some rights reserved (CC BY-SA) · observed growing wild · 2012-09-28

Coleonema calycinum (Steud.) I.Williams

Rum Capemay; Rum-Scented Confetti Bush

Rutaceae · Cape Provinces

Add one to my plants
Sow seed
Coleonema calycinum, photograph (c) Ren Hoekstra, some rights reserved (CC BY)Coleonema calycinum, photograph (c) Dave U, some rights reserved (CC BY-SA)Coleonema calycinum, photograph (c) Dave U, some rights reserved (CC BY-SA)Coleonema calycinum, photograph (c) Nicola van Berkel, some rights reserved (CC BY-SA)Coleonema calycinum, photograph (c) Nicola van Berkel, some rights reserved (CC BY-SA)Coleonema calycinum, photograph (c) Charles Stirton, some rights reserved (CC BY-SA) 8 photographs ›
Habitat figures
Cold floor (1 night in 100)
5.5°C
Record low 3.1 °C in 44 years, at a typical spot in the range NASA POWER
Warmest month, mean daily high
27°C
Jan and Feb at the habitat CHELSA
Rain a year (median across the range)
467mm
12 months of 25 mm or more in the median year CHELSA
Open-sky light
16–47DLI
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
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 · Coleonema

Coleonema is a genus of flowering plants in the family Rutaceae. The eight known species are all from the western Cape Province of South Africa. In Australia, where they are cultivated as garden ornamentals, they are often referred to as Diosma, a different genus in the same family.

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

Cultivation

Seasons

The rain rule reads no short rainy season: 70% of the median year's rain (358 mm of 476 mm) takes 8 months, March to August and October to November. Mean temperature moves 9.3 °C between the warmest and coldest month. Months are the habitat's, southern hemisphere; shifted six months for a northern-hemisphere collection: September to February and April to May.

Rain

476 mm in the median year at the habitat, 358 mm of it March to August and October to November. Wettest month April at 62 mm, driest month February at 27 mm. Across the grid cells of the range the year's total runs 413 mm to 785 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 467 mm, is the year's rain at the top of the page; the 476 mm here is the median year's, the twelve monthly medians added, which the rain rule reads. Habitat calendar, southern hemisphere; median year across the grid cells of the range, CHELSA.

Light

Open sky over the habitat: 16 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 16, 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 5.5 °C, the absolute minimum 3.1 °C, no frost in 44 years (NASA POWER daily minima). Warmest: the 99th-percentile day is 34.7 °C. Monthly means: the coldest month's mean nightly low 7.0 °C in July (across the grid cells of the range 5.6 °C to 8.1 °C), the warmest month's mean daily high 26.6 °C in January and February (median year across the grid cells of the range, CHELSA). Cold floor: 5.5 °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: 58 to 62% 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 -70 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, southern hemisphere

Habitat climate of Coleonema calycinum through the yearWarmest months January and February, mean daily high 27 °C; coldest month July, mean nightly low 7.0 °C; 476 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, southern hemisphere.0°10°20°30°40°34.7° 99th-percentile day, NASA POWER3.1° lowest night in 44 years, NASA POWER°C · day and nightcold quarter0255075100125mm rainDLI 16–47RH 58–62%JanFebMarAprMayJunJulAugSepOctNovDec
day night rain medians and 10th–90th percentile across 8 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 °C27 / 25–2827 / 25–2825 / 24–2623 / 22–2320 / 19–2118 / 16–1817 / 15–1718 / 16–1819 / 18–2021 / 21–2223 / 22–2425 / 24–27
Night °C17 / 14–1717 / 15–1816 / 14–1714 / 12–1411 / 9–128 / 7–97 / 6–88 / 6–910 / 7–1012 / 9–1314 / 11–1416 / 13–16
Rain mm30 / 22–3827 / 16–3238 / 22–4562 / 42–7843 / 37–8542 / 39–10749 / 46–11546 / 42–9529 / 27–6843 / 32–6435 / 26–5132 / 20–44
DLI47 / 47–5141 / 40–4633 / 33–3725 / 25–2719 / 18–2016 / 16–1718 / 17–1823 / 22–2330 / 30–3137 / 37–4044 / 44–4747 / 47–51
RH %58 / 55–5960 / 56–6161 / 57–6162 / 57–6260 / 58–6159 / 58–6058 / 58–6059 / 59–6160 / 58–6159 / 56–5958 / 55–5958 / 55–59
How this section is made
Each figure is the median across the 8 grid cells holding the 12 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 2488:4004 (-34.425, 20.225). Over 44 years there: absolute minimum 3.1 °C, 1st-percentile night 5.5 °C, 99th-percentile day 34.7 °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 8 distinct grid cells holding 12 of the 12 in-range records; extremes and elevation at the typical cell 2488:4004 (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 -34.50_20.000, lapse-corrected -70 m at 6.5 °C/km. Elevation: ETOPO 2022, 63 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.
NativeCape Provinces · 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 marker-34.375, 20.375 · in the densest population, 30 records (100% 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 30 georeferenced records inside the native range; the climate across the range on the 12 of them placed to within 10 km; the map shows only the 20 openly licensed ones, which alone would put the marker 42 km away. 18 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 30 in-range records; it decides nothing. Records outside the native range, living specimens and records marked introduced are not used; which records count.

Photographs

Coleonema calycinum, photograph 1did not loadColeonema calycinum, photograph 2did not loadColeonema calycinum, photograph 3did not loadColeonema calycinum, photograph 4did not loadColeonema calycinum, photograph 5did not loadColeonema calycinum, photograph 6did not load

Photographs: (c) Ren Hoekstra, some rights reserved (CC BY); (c) Dave U, some rights reserved (CC BY-SA) (2); (c) Nicola van Berkel, some rights reserved (CC BY-SA) (2); (c) Charles Stirton, some rights reserved (CC BY-SA).

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

Mesembryanthemum parviflorum Mesembryanthemum parviflorum Mini Ashbush Photo: CC BY, Martjie Fia FourieDrosanthemum striatum Drosanthemum striatum Striped Dewfig Photo: CC BY-SA, James DeaconGasteria carinata Gasteria carinata Keeled Oxtongue Photo: CC BY, Christiaan ViljoenLachenalia filamentosa Lachenalia filamentosa Filamentous Viooltjie Photo: CC BY, agujaceratopsAdromischus caryophyllaceus Adromischus caryophyllaceus Crassulaceae Photo: CC BY, Adele SLMassonia setulosa Massonia setulosa Rûens Hedgehog Lily Photo: CC BY, Ren Hoekstra

Other Coleonema 3 in the reference

Coleonema album Coleonema album Cape-May Photo: CC BY, Justin PonderColeonema pulchellum Coleonema pulchellum Pink Breath of Heaven Photo: CC0, author not statedColeonema pulchrum Coleonema pulchrum Pink Confetti Bush Photo: CC BY, Ren Hoekstra

Names & registers

Also known as Coleonema album var. gracile; Coleonema gracile; Diosma calycina; Diosma tenuifolia. (GBIF Backbone)

GBIFPOWOIPNIWFOWikidataiNaturalist

The record

Family
Rutaceae
Described by
(Steud.) I.Williams
Native to
Cape Provinces
Wild records
30 in range · 20 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
Habitat climate climate answeredasked 2026-10-21
Daily extremes (NASA POWER) climate.extremes answeredasked 2026-10-21NASA POWER (MERRA-2) daily 1981–2024, cell -34.50_20.000, lapse-corrected -70 m at 6.5 °C/km
Wikidata wikidata answeredasked 2026-10-21
Wikipedia wikipedia nothing to reportasked 2026-10-21
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 2026-10-21none of the photographs on this page is credited to GBIF: those shown are other sources', and GBIF's were the same photographs or were set aside by the photograph rules
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 4 datasets via GBIF.org; each carries its own licence.

Cultifolio

Opening your plants…