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Grevillea oleoides; photograph (c) ronavery, some rights reserved (CC BY) CC BY(c) ronavery, some rights reserved (CC BY) · observed growing wild · 2026-09-13

Grevillea oleoides Sieber

Proteaceae · New South Wales

Cited as Kew's World Checklist cites it, Grevillea oleoides Sieber: GBIF's backbone key for this page carries the name with another author, Sieber ex Schult.

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Grevillea oleoides, photograph (c) ronavery, some rights reserved (CC BY)Grevillea oleoides, photograph (c) ronavery, some rights reserved (CC BY)Grevillea oleoides, photograph (c) ronavery, some rights reserved (CC BY)Grevillea oleoides, photograph (c) ronavery, some rights reserved (CC BY)Grevillea oleoides, photograph (c) ronavery, some rights reserved (CC BY)Grevillea oleoides, photograph (c) ronavery, some rights reserved (CC BY) 87 photographs ›
Habitat figures
Cold floor (1 night in 100)
2.5°C
Record low -0.9 °C in 44 years, at a typical spot in the range NASA POWER
Warmest month, mean daily high
25°C
Jan at the habitat CHELSA
Rain a year (median across the range)
1,045mm
12 months of 25 mm or more in the median year CHELSA
Open-sky light
16–42DLI
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.

Summary

Grevillea oleoides, also known as red spider flower, is a species of flowering plant in the family Proteaceae and is endemic to eastern New South Wales. It is an erect shrub with egg-shaped leaves, the narrower end towards the base, sometimes elliptic or linear leaves and red or reddish-pink flowers usually within the foliage.

Quoted from Wikipedia, "Grevillea oleoides", CC BY-SA 4.0.

About the genus · Grevillea

Grevillea, commonly known as spider flowers, is a genus of about 360 species of evergreen flowering plants in the family Proteaceae. Plants in the genus Grevillea are shrubs, rarely trees, with the leaves arranged alternately along the branches, the flowers zygomorphic, arranged in racemes at the ends of branchlets, and the fruit a follicle that splits down one side only, releasing one or two seeds.

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

Cultivation

Seasons

The rain rule reads no short rainy season: 70% of the median year's rain (769 mm of 1,041 mm) takes 8 months, November to June. Mean temperature moves 10.8 °C between the warmest and coldest month. Months are the habitat's, southern hemisphere; shifted six months for a northern-hemisphere collection: May to December.

Rain

1,041 mm in the median year at the habitat, 769 mm of it November to June. Wettest month February at 129 mm, driest month September at 61 mm. Across the grid cells of the range the year's total runs 855 mm to 1,188 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 1,045 mm, is the year's rain at the top of the page; the 1,041 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 42 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 15, the highest 90th-percentile month 43).

Warmth and air
Temperature

Coldest: the 1st-percentile night over 44 years at a typical spot in the range is 2.5 °C, the absolute minimum -0.9 °C, 2 frost nights in 44 years (NASA POWER daily minima). Warmest: the 99th-percentile day is 36.0 °C. Monthly means: the coldest month's mean nightly low 6.4 °C in July (across the grid cells of the range 4.0 °C to 10.1 °C), the warmest month's mean daily high 24.5 °C in January (median year across the grid cells of the range, CHELSA). Cold floor: 2.5 °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: 56 to 63% 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 -17 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 Grevillea oleoides through the yearWarmest month January, mean daily high 25 °C; coldest month July, mean nightly low 6.4 °C; 1,041 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.-10°0°10°20°30°40°frost36.0° 99th-percentile day, NASA POWER-0.9° lowest night in 44 years, NASA POWER°C · day and nightcold quarter0255075100125150mm rainDLI 16–42RH 56–63%JanFebMarAprMayJunJulAugSepOctNovDec
day night rain medians and 10th–90th percentile across 115 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 °C25 / 24–2724 / 23–2622 / 21–2420 / 18–2117 / 15–1915 / 12–1614 / 11–1615 / 13–1718 / 16–2020 / 19–2221 / 20–2423 / 22–26
Night °C18 / 15–2018 / 15–2016 / 13–1913 / 10–1610 / 8–148 / 5–116 / 4–107 / 5–119 / 7–1212 / 9–1414 / 11–1616 / 13–18
Rain mm90 / 74–102129 / 106–14793 / 74–108102 / 83–12287 / 69–11088 / 64–10966 / 54–7965 / 49–7561 / 51–6980 / 65–9194 / 82–10786 / 78–97
DLI41 / 40–4235 / 34–3630 / 30–3124 / 23–2518 / 17–1916 / 15–1618 / 17–1824 / 23–2431 / 31–3237 / 36–3840 / 39–4142 / 41–43
RH %61 / 59–6363 / 60–6562 / 59–6461 / 59–6260 / 58–6259 / 58–6158 / 57–6056 / 55–5856 / 55–5757 / 56–5860 / 58–6160 / 58–62
How this section is made
Each figure is the median across the 115 grid cells on land that hold in-range records (743 records in those cells; 2 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 2486:6615 (-34.325, 150.775). Over 44 years there: absolute minimum -0.9 °C, 1st-percentile night 2.5 °C, 99th-percentile day 36.0 °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 115 distinct grid cells holding 743 of the 745 in-range records (2 further cells with records at sea, by the elevation layer, left out); extremes and elevation at the typical cell 2486:6615 (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_150.625, lapse-corrected -17 m at 6.5 °C/km. Elevation: ETOPO 2022, 351 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.
NativeNew South Wales · 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-34.161, 150.939 · in the densest population, 768 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 771 georeferenced records inside the native range; the climate across the range on the 743 of them in the land cells it reads, of 745 placed to within 10 km; the map shows only the 605 openly licensed ones, which alone would put the marker 4 km away. 3 records outside the WCVP native range not used. 26 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 771 in-range records; it decides nothing. Records outside the native range, living specimens and records marked introduced are not used; which records count.

Photographs

Grevillea oleoides, photograph 1did not loadGrevillea oleoides, photograph 2did not loadGrevillea oleoides, photograph 3did not loadGrevillea oleoides, photograph 4did not loadGrevillea oleoides, photograph 5did not loadGrevillea oleoides, photograph 6did not load

Photographs: (c) ronavery, some rights reserved (CC BY) (6).

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

Allocasuarina distyla Allocasuarina distyla Scrub She-Oak Photo: CC BY, Bryce Watts-ParkerOlearia tomentosa Olearia tomentosa Toothed daisy-bush Photo: CC BY, Bryce Watts-ParkerSchoenus melanostachys Schoenus melanostachys Black Bog-rush Photo: CC BY, ronaveryTelopea speciosissima Telopea speciosissima New South Wales waratah Photo: CC BY-SA, James K. DouchLeptospermum squarrosum Leptospermum squarrosum Peach blossom Tea Tree Photo: CC BY-SA, bughntrHakea salicifolia Hakea salicifolia Finger hakea Photo: CC BY, Hannah Rogers

Other Grevillea 104 in the reference

Grevillea acanthifolia Grevillea acanthifolia Proteaceae Photo: CC BY, Hilary Rose DawsonGrevillea alpina Grevillea alpina Catclaws grevillea Photo: CC BY, Eamonn CulhaneGrevillea aquifolium Grevillea aquifolium Proteaceae Photo: CC BY, grampianshikerGrevillea arenaria Grevillea arenaria Proteaceae Photo: CC BY-SA, Lachlan CopelandGrevillea armigera Grevillea armigera Prickly Toothbrushes Photo: CC BY, pimeleaGrevillea aspleniifolia Grevillea aspleniifolia Proteaceae Photo: CC BY, Stephen ThorpeGrevillea asteriscosa Grevillea asteriscosa Star-leaf Grevillea Photo: CC BY-SA, MelburnianGrevillea australis Grevillea australis Alpine grevillea Photo: CC BY, Petra HollandGrevillea banksii Grevillea banksii Kahili flower Photo: CC BY, Paulo C. O. CunhaGrevillea barklyana Grevillea barklyana Gully grevillea Photo: CC BY, Michael HainsGrevillea baueri Grevillea baueri Proteaceae Photo: CC BY-SA, Tony EalesGrevillea beadleana Grevillea beadleana Proteaceae Photo: CC BY-SA, Lachlan Copeland all 105 ›

Names & registers

Also known as Grevillea planifolia; Grevillea seymouriae; Grevillea speciosa subsp. oleoides; Hakea oleoides. (GBIF Backbone)

GBIFPOWOIPNIWFOWikidataWikipediaiNaturalist

The record

Family
Proteaceae
Described by
Sieber
Native to
New South Wales
Wild records
771 in range · 605 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 7287061 is Grevillea oleoides Sieber ex Schult.; the page links Kew's Grevillea oleoides Sieber, 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; 19 records within 1 km of a botanic garden, herbarium or zoo left out (8 at a botanic garden or arboretum, 11 at a zoo; 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 -34.50_150.625, lapse-corrected -17 m at 6.5 °C/km
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 2026-10-22
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 18 datasets via GBIF.org; each carries its own licence.

Cultifolio

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