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Grevillea preissii; photograph Astrid Osborne, CC0, iNaturalist via GBIF CC0Astrid Osborne, CC0, iNaturalist via GBIF

Grevillea preissii Meisn.

Proteaceae · Western Australia

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Grevillea preissii, photograph Astrid Osborne, CC0, iNaturalist via GBIFGrevillea preissii, photograph Melburnian, CC BY 2.5, via Wikimedia CommonsGrevillea preissii, photograph Dcoetzee, Public domain, via Wikimedia CommonsGrevillea preissii, photograph Ilena from Perth, Australia, CC BY-SA 2.0, via Wikimedia CommonsGrevillea preissii, photograph Gnangarra, CC BY 2.5 au, via Wikimedia CommonsGrevillea preissii, photograph Gnangarra, CC BY 2.5 au, via Wikimedia Commons 7 photographs ›
Habitat figures
Cold floor (1 night in 100)
6.5°C
Record low 3.9 °C in 44 years, at a typical spot in the range NASA POWER
Warmest month, mean daily high
29°C
Jan and Feb at the habitat CHELSA
Rain a year (median across the range)
748mm
8 months of 25 mm or more in the median year CHELSA
Open-sky light
17–53DLI
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 (May to September at the habitat), read as a winter growing season. rain rule, CHELSA
Northern hemisphere unless you set your site. The chart is in the habitat's months.

Summary

Grevillea preissii is a species of flowering plant in the family Proteaceae and is endemic to the southwest of Western Australia. It is a mounded to spreading or dense, erect shrub, the leaves divided with 5 to 7 linear to more or less cylindrical lobes, and groups of reddish flowers arranged along one side of the flowering rachis.

Quoted from Wikipedia, "Grevillea preissii", 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 a winter growing season: 70% of the median year's rain (594 mm of 749 mm) falls in May to September, cooler than the year (wet-season mean 14.7 °C against a yearly mean of 18.4 °C). Months are the habitat's, southern hemisphere; shifted six months for a northern-hemisphere collection: November to March.

Rain

749 mm in the median year at the habitat, 594 mm of it May to September. Wettest month July at 149 mm, driest month December at 9 mm. Across the grid cells of the range the year's total runs 556 mm to 882 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 748 mm, is the year's rain at the top of the page; the 749 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: 17 to 53 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 54).

Warmth and air
Temperature

Coldest: the 1st-percentile night over 44 years at a typical spot in the range is 6.5 °C, the absolute minimum 3.9 °C, no frost in 44 years (NASA POWER daily minima). Warmest: the 99th-percentile day is 42.7 °C. Monthly means: the coldest month's mean nightly low 10.3 °C in July and August (across the grid cells of the range 8.9 °C to 11.6 °C), the warmest month's mean daily high 29.2 °C in February (median year across the grid cells of the range, CHELSA). Cold floor: 6.5 °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: 52 to 57% 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 +4 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 preissii through the yearWarmest months January and February, mean daily high 29 °C; coldest months July and August, mean nightly low 10.3 °C; 749 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°50°42.7° 99th-percentile day, NASA POWER3.9° lowest night in 44 years, NASA POWER°C · day and nightcold quarter050100150200mm rainDLI 17–53RH 52–57%JanFebMarAprMayJunJulAugSepOctNovDec
day night rain medians and 10th–90th percentile across 78 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 °C29 / 26–3229 / 27–3228 / 26–3024 / 23–2621 / 20–2218 / 17–1817 / 16–1717 / 16–1818 / 17–2021 / 19–2324 / 22–2626 / 24–29
Night °C19 / 17–1919 / 18–2018 / 17–1915 / 14–1713 / 12–1511 / 10–1310 / 9–1210 / 9–1211 / 10–1213 / 12–1415 / 14–1617 / 16–18
Rain mm14 / 9–1613 / 12–1521 / 17–2336 / 24–46102 / 80–128148 / 107–177149 / 113–171120 / 87–13475 / 52–9437 / 25–4625 / 17–319 / 8–10
DLI53 / 53–5347 / 47–4739 / 38–4029 / 27–3021 / 19–2217 / 15–1817 / 16–1923 / 21–2531 / 29–3342 / 40–4349 / 48–5053 / 53–54
RH %52 / 50–5552 / 50–5452 / 51–5454 / 54–5655 / 55–5656 / 56–5857 / 56–5857 / 56–5857 / 56–5856 / 55–5754 / 52–5653 / 51–55
How this section is made
Each figure is the median across the 78 grid cells on land that hold in-range records (184 records in those cells; 3 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 2353:5885 (-27.675, 114.275). Over 44 years there: absolute minimum 3.9 °C, 1st-percentile night 6.5 °C, 99th-percentile day 42.7 °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 78 distinct grid cells holding 184 of the 187 in-range records (3 further cells with records at sea, by the elevation layer, left out); extremes and elevation at the typical cell 2353:5885 (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 -27.50_114.375, lapse-corrected +4 m at 6.5 °C/km. Elevation: ETOPO 2022, 147 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.
NativeWestern Australia · 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-31.85, 115.758 · in the densest population, 192 records (92% 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 209 georeferenced records inside the native range; the climate across the range on the 184 of them in the land cells it reads, of 187 placed to within 10 km; the map shows only the 189 openly licensed ones, which alone would put the marker in the same place. 4 records outside the WCVP native range not used. 22 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 209 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 preissii, photograph 1did not loadGrevillea preissii, photograph 2did not loadGrevillea preissii, photograph 3did not loadGrevillea preissii, photograph 4did not loadGrevillea preissii, photograph 5did not loadGrevillea preissii, photograph 6did not load

Photographs: Astrid Osborne, CC0, iNaturalist via GBIF; Melburnian, CC BY 2.5, via Wikimedia Commons; Dcoetzee, Public domain, via Wikimedia Commons; Ilena from Perth, Australia, CC BY-SA 2.0, via Wikimedia Commons; Gnangarra, CC BY 2.5 au, via Wikimedia Commons (2).

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

Melaleuca systena Melaleuca systena Coastal honeymyrtle Photo: CC BY, Millie BradyGrevillea crithmifolia Grevillea crithmifolia Proteaceae Photo: CC BY, Millie BradyEucalyptus gomphocephala Eucalyptus gomphocephala Tuart Photo: CC BY, pimeleaDiplolaena angustifolia Diplolaena angustifolia Rutaceae Photo: CC BY, Chantel McWilliamMelaleuca huegelii Melaleuca huegelii Chenille honey myrtle Photo: CC BY, Millie BradyTrachymene coerulea Trachymene coerulea Blue laceflower Photo: CC BY, Em Lamond

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 splendens; Grevillea thelemanniana subsp. preissei; Grevillea thelemanniana subsp. preissii; Hakea dixoniana. (GBIF Backbone)

GBIFPOWOIPNIWikidataWikipedia

The record

Family
Proteaceae
Described by
Meisn.
Native to
Western Australia
Wild records
209 in range · 189 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 2026-10-22
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 (16 at a botanic garden or arboretum, 3 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 -27.50_114.375, lapse-corrected +4 m at 6.5 °C/km
Wikidata wikidata answeredasked 2026-10-22IPNI and POWO linked by Kew's number for Grevillea preissii Meisn. (the item's: IPNI 158174-3, POWO 703991-1)
Wikipedia wikipedia answeredasked 2026-10-22
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 2026-10-22
Wikimedia Commons commons 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 15 datasets via GBIF.org; each carries its own licence.

Cultifolio

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