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Rhododendron ericoides; photograph (c) vrxz, some rights reserved (CC BY-SA) CC BY-SA(c) vrxz, some rights reserved (CC BY-SA) · observed growing wild · 2025-08-04

Rhododendron ericoides H.Low ex Hook.f.

Ericaceae · Borneo

Cited as Kew's World Checklist cites it, Rhododendron ericoides H.Low ex Hook.f.: GBIF's backbone key for this page carries the name with another author, H.Low ex Hook.fil.

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Rhododendron ericoides, photograph (c) vrxz, some rights reserved (CC BY-SA)Rhododendron ericoides, photograph (c) vrxz, some rights reserved (CC BY-SA)Rhododendron ericoides, photograph (c) vrxz, some rights reserved (CC BY-SA)Rhododendron ericoides, photograph (c) vrxz, some rights reserved (CC BY-SA)Rhododendron ericoides, photograph (c) vrxz, some rights reserved (CC BY-SA)Rhododendron ericoides, photograph (c) vrxz, some rights reserved (CC BY-SA) 35 photographs ›
Habitat figuresfrom few records
Coldest month, mean nightly low
11.7°C
Jul, Aug and Sep at the habitat, not a floor; extremes not used (the weather cell's ground is too far off) CHELSA
Warmest month, mean daily high
21°C
Apr and May at the habitat CHELSA
Rain a year (median across the range)
3,237mm
12 months of 25 mm or more in the median year CHELSA
Open-sky light
26–35DLI
Lowest to highest month (DLI) CHELSA
The year in the habitat's months, not shifted
  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
Not shifted: the shift rule does not apply to this habitat. The chart is in the habitat's months.

From few records: 29 records in 4 grid cells. The records.

Summary

Rhododendron ericoides is a species of rhododendron native to Borneo. It is found only on Mount Kinabalu. It is native to subalpine and alpine shrublands above 2,600 meters (8,500 ft) elevation.

Quoted from Wikipedia, "Rhododendron ericoides", CC BY-SA 4.0.

About the genus · Rhododendron

Rhododendron, from Ancient Greek ῥόδον (rhódon), meaning "rose", and δένδρον (déndron), meaning "tree", is a very large genus of about 1,024 species of woody plants in the heath family (Ericaceae). They can be either evergreen or deciduous. Most species are native to eastern Asia and the Himalayan region, but smaller numbers occur elsewhere in Asia, and in North America, Europe and Australia.

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

Cultivation

Seasons

The rain rule reads no short rainy season: 70% of the median year's rain (2,420 mm of 3,195 mm) takes 8 months, September to January and May to July. Mean temperature moves 1.0 °C between the warmest and coldest month. Months are the habitat's, northern hemisphere. The habitat lies within 10° of the equator, where the shift rule does not apply, so they are not shifted for a collection elsewhere.

Rain

3,195 mm in the median year at the habitat, 2,420 mm of it September to January and May to July. Wettest month October at 355 mm, driest month February at 160 mm. Across the grid cells of the range the year's total runs 2,899 mm to 3,379 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 3,237 mm, is the year's rain at the top of the page; the 3,195 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: 26 to 35 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 26, the highest 90th-percentile month 36).

Warmth and air
Temperature

Monthly means: the coldest month's mean nightly low 11.7 °C in July, August and September (across the grid cells of the range 4.1 °C to 13.7 °C), the warmest month's mean daily high 20.9 °C in April (median year across the grid cells of the range, CHELSA). Cold floor: none read. The nearest figure is 11.7 °C, the coldest month's mean nightly low, July, August and September, in the median year (CHELSA); a month's mean of its nightly lows is warmer than the nights a floor is read from. The daily extremes were read at a weather cell whose ground is too far above or below the typical spot to correct for, and are not used.

Humidity

Relative humidity at the habitat: 65 to 70% 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. CHELSA monthly means, median year across the grid cells of the range. No cold floor is read without a daily extremes series; the coldest month's mean nightly low named in its sentence is not one. 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

From few records: this habitat climate is read from 29 records in 4 grid cells; a page says so under 12 records or 5 cells, and shows the figures as read.

Habitat months, northern hemisphere

Habitat climate of Rhododendron ericoides through the yearWarmest months April and May, mean daily high 21 °C; coldest months July, August and September, mean nightly low 11.7 °C; 3,195 mm of rain in the median year (the twelve monthly medians added). Medians across the range, from CHELSA. Habitat months, northern hemisphere.0°5°10°15°20°25°°C · day and nightcold quarter0100200300400mm rainDLI 26–35RH 65–70%JanFebMarAprMayJunJulAugSepOctNovDec
day night rain medians and 10th–90th percentile across 4 habitat cells, CHELSA cold quarter: the three months around the coldest month's mean nightly low DLI, mol/m²/dayRH %each on its own scale
Figures by month
JanFebMarAprMayJunJulAugSepOctNovDec
Day °C19 / 12–2120 / 13–2220 / 14–2221 / 14–2321 / 14–2320 / 13–2220 / 13–2220 / 13–2220 / 13–2220 / 13–2119 / 13–2119 / 13–21
Night °C12 / 5–1412 / 5–1412 / 5–1412 / 5–1413 / 5–1512 / 5–1412 / 4–1412 / 4–1412 / 4–1412 / 5–1412 / 5–1412 / 5–14
Rain mm272 / 227–299160 / 141–172171 / 153–183182 / 167–192302 / 273–320283 / 272–302279 / 274–298262 / 257–279296 / 278–318355 / 321–379302 / 263–319331 / 273–354
DLI28 / 26–2931 / 30–3335 / 34–3635 / 34–3530 / 28–3127 / 26–2928 / 26–2930 / 28–3129 / 28–3027 / 26–2826 / 26–2826 / 26–28
RH %68 / 60–6866 / 59–6665 / 57–6566 / 59–6769 / 63–6967 / 64–6766 / 63–6666 / 63–6667 / 64–6870 / 66–7070 / 64–7170 / 63–70

The daily extremes were not used: the correction for elevation, +1366 m, is beyond the 1,000 m either way that a lapse rate is applied over, so the weather cell's ground is other terrain than the typical spot's. So no cold floor is read for this species, and the coldest month's mean nightly low is not taken as one. What that cell gave, so corrected, over 44 years: absolute minimum 6.5 °C, 1st-percentile night 9.3 °C.

How this section is made
Each figure is the median across the 4 grid cells holding the 29 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 1679:5931 (6.025, 116.575). 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 4 distinct grid cells holding 29 of the 29 in-range records; extremes and elevation at the typical cell 1679:5931 (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 6.00_116.875, lapse-corrected +1366 m at 6.5 °C/km. Elevation: ETOPO 2022, 1842 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.
NativeBorneo · 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 marker6.069, 116.563 · in the densest population, 42 records (91% of those in range)
Kew's description“epiphyte” · “montane tropical” · quoted from WCVP, RBG Kew (CC BY 4.0); not derived here
Evidence usedThe map marker rests on all 46 georeferenced records inside the native range; the climate across the range on the 29 of them placed to within 10 km; the map shows only the 28 openly licensed ones, which alone would put the marker in the same place. 17 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 46 in-range records; it decides nothing. Records outside the native range, living specimens and records marked introduced are not used; which records count.

Photographs

Rhododendron ericoides, photograph 1did not loadRhododendron ericoides, photograph 2did not loadRhododendron ericoides, photograph 3did not loadRhododendron ericoides, photograph 4did not loadRhododendron ericoides, photograph 5did not loadRhododendron ericoides, photograph 6did not load

Photographs: (c) vrxz, some rights reserved (CC BY-SA) (6).

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

Rhododendron cuneifolium Rhododendron cuneifolium Ericaceae Photo: CC BY, My-Lan LeDrosera ultramafica Drosera ultramafica Droseraceae Photo: CC BY, Fabian BrambachAeridostachya robusta Aeridostachya robusta Orchidaceae Photo: CC BY, Jay PruettColumnea dimidiata Columnea dimidiata Gesneriaceae Photo: CC BY, Daniel MesaPiper lanceifolium Piper lanceifolium Piperaceae Photo: CC BY, desertnaturalistMaxillaria luteograndiflora Maxillaria luteograndiflora Sunburst Tiger Orchid Photo: CC BY-SA, Yu

Other Rhododendron 574 in the reference

Rhododendron aberconwayi Rhododendron aberconwayi Ericaceae Photo: Public domain, Daderot Rhododendron abietifolium Ericaceae Rhododendron acrophilum Ericaceae Rhododendron adamsii Rhododendron adamsii Sagan Dalya Photo: CC BY, Valentin KosterinRhododendron adenogynum Rhododendron adenogynum Ericaceae Photo: CC BY-SA, Kurt StüberRhododendron adenopodum Rhododendron adenopodum Ericaceae Photo: CC BY-SA, Ulf EliassonRhododendron adenosum Rhododendron adenosum Ericaceae Photo: CC0, DaderotRhododendron aeruginosum Rhododendron aeruginosum Ericaceae Photo: CC BY, Siddarth MachadoRhododendron aganniphum Rhododendron aganniphum Ericaceae Photo: CC0, Daderot Rhododendron agathodaemonis Ericaceae Rhododendron alabamense Rhododendron alabamense Alabama azalea Photo: CC BY, Rob JohnRhododendron albiflorum Rhododendron albiflorum White rhododendron Photo: CC0, author not stated all 575 ›

Names & registers

GBIFPOWOIPNIWFOWikidataWikipediaiNaturalist

The record

Family
Ericaceae
Described by
H.Low ex Hook.f.
Native to
Borneo
Wild records
46 in range · 28 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 2026-10-22
GBIF species record gbif.species answeredasked 2026-10-22GBIF's key 4936849 is Rhododendron ericoides H.Low ex Hook.fil.; the page links Kew's Rhododendron ericoides H.Low ex Hook.f., and the name is cited as Kew cites it
GBIF synonyms gbif.synonyms answeredasked 2026-10-22
GBIF common names gbif.vernacular answeredasked 2026-10-22names fetched 2026-10-22
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 2026-10-22
Daily extremes (NASA POWER) climate.extremes answeredasked 2026-10-22NASA POWER (MERRA-2) daily 1981–2024, cell 6.00_116.875, lapse-corrected +1366 m at 6.5 °C/km; read, and set aside: the correction for elevation, +1366 m, is beyond the 1,000 m either way that a lapse rate is applied over, so the weather cell's ground is other terrain than the typical spot's, so no cold floor is shown
Wikidata wikidata answeredasked 2026-10-22
Wikipedia wikipedia answeredasked 2026-10-22
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 2026-10-22none 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
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 5 datasets via GBIF.org; each carries its own licence.

Cultifolio

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