40 photographs › At a glance
- Jan
- Feb
- Mar
- Apr
- May
- Jun, shaded
- Jul, shaded
- Aug, shaded
- Sep, shaded
- Oct, shaded
- Nov
- Dec
From few records: 31 records in 4 grid cells. The records.
Summary
Gardenia actinocarpa is a rare and endangered plant in the coffee and gardenia family Rubiaceae, native to a very restricted area within the Wet Tropics rainforest of northeastern Queensland.
Quoted from Wikipedia, "Gardenia actinocarpa", CC BY-SA 4.0.
About the genus · Gardenia
Gardenia is a genus of flowering plants in the coffee family, Rubiaceae, native to the tropical and subtropical regions of Africa, Asia, Madagascar, Pacific Islands, and Australia.
Quoted from Wikipedia, "Gardenia", CC BY-SA 4.0.
Cultivation
Seasons
The rain rule reads a summer growing season: 70% of the median year's rain (2,544 mm of 3,296 mm) falls in December to April, warmer than the year (wet-season mean 25.5 °C against a yearly mean of 23.5 °C). Months are the habitat's, southern hemisphere; shifted six months for a northern-hemisphere collection: June to October.
Rain
3,296 mm in the median year at the habitat, 2,544 mm of it December to April. Wettest month March at 646 mm, driest month September at 69 mm. Across the grid cells of the range the year's total runs 3,184 mm to 3,471 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 3,292 mm, is the year's rain at the top of the page; the 3,296 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: 26 to 44 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 25, the highest 90th-percentile month 44).
Warmth and air
Monthly means: the coldest month's mean nightly low 18.6 °C in July (across the grid cells of the range 16.5 °C to 19.8 °C), the warmest month's mean daily high 27.4 °C in January (median year across the grid cells of the range, CHELSA). Cold floor: none read. The nearest figure is 18.6 °C, the coldest month's mean nightly low, July, 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 that is mostly sea and are not used.
Relative humidity at the habitat: 65 to 72% 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 31 records in 4 grid cells; a page says so under 12 records or 5 cells, and shows the figures as read.
Habitat months, southern hemisphere
Mean daily high from 21 °C in Jul to 27 °C in Jan, Feb and Dec; mean nightly low from 19 °C in Jun, Jul and Aug to 24 °C in Jan, Feb, Mar and Dec. The cold quarter, Jun to Aug, is the three months around the coldest month's mean nightly low, centred on the 3 months in a row that tie for it. 3,296 mm of rain in the median year (the twelve monthly medians added), the wettest month Mar. The bands show the 10th to 90th percentile across 4 habitat cells. Beneath: daily light integral and relative humidity through the year, each on its own scale.
Figures by month
| Figure | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Day °C | 27 / 26–28 | 27 / 25–28 | 26 / 25–27 | 25 / 23–26 | 24 / 22–24 | 22 / 20–23 | 21 / 20–22 | 22 / 20–23 | 23 / 22–24 | 25 / 24–26 | 26 / 25–27 | 27 / 26–28 |
| Night °C | 24 / 22–25 | 24 / 22–25 | 24 / 21–25 | 23 / 20–24 | 21 / 19–22 | 19 / 17–21 | 19 / 17–20 | 19 / 17–20 | 20 / 18–21 | 22 / 20–23 | 23 / 21–24 | 24 / 22–25 |
| Rain mm | 584 / 558–612 | 601 / 566–628 | 646 / 636–688 | 400 / 396–427 | 187 / 182–198 | 91 / 89–97 | 86 / 84–92 | 70 / 69–75 | 69 / 67–74 | 78 / 75–82 | 171 / 161–177 | 313 / 298–328 |
| DLI | 39 / 37–40 | 36 / 34–37 | 35 / 34–36 | 32 / 32–33 | 28 / 27–28 | 26 / 25–27 | 27 / 26–28 | 32 / 31–32 | 39 / 38–39 | 43 / 43–43 | 44 / 43–44 | 42 / 40–42 |
| RH % | 71 / 69–72 | 72 / 69–73 | 71 / 69–72 | 71 / 68–72 | 70 / 67–72 | 69 / 66–70 | 68 / 65–69 | 67 / 65–68 | 65 / 64–66 | 66 / 64–67 | 67 / 65–69 | 69 / 67–71 |
The daily extremes were read at a NASA POWER cell that is 20% land: neither it nor the next candidates whose coldest month's mean nightly low is within 2 °C of the median across cells sit in a POWER cell that is mostly land, and the rule reads a cold floor only from a cell that is mostly land, so none is read for this species. Nor is the coldest month's mean nightly low taken as one: it is a mean of a month's lows, not its coldest night. What that cell gave over 44 years: absolute minimum 17.1 °C, 1st-percentile night 20.1 °C, 99th-percentile day 30.8 °C.
How this section is made
Natural habitat
How this section is made
Photographs
Photographs: (c) James K. Douch, some rights reserved (CC BY-SA); (c) Steve Fitzgerald, some rights reserved (CC BY-SA) (3); (c) Daniel Montesinos, some rights reserved (CC BY) (2).
Related
Similar habitat climate The 6 nearest by mean daily high, mean nightly low and rain, month by month. How.
Drosera prolifera Droseraceae Photo: CC BY-SA, Petr Dlouhý
Diploglottis harpullioides Babinda tamarind Photo: CC BY-SA, Evert Materman
Idiospermum australiense Idiot-fruit Photo: CC BY, Shelomi Doyle
Normanbya normanbyi Black palm Photo: CC BY-SA, James K. Douch
Rhaphidophora hayi Shingle plant Photo: CC BY, Luke Lythgoe
Buckinghamia ferruginiflora Noah's Oak Photo: CC BY, G. SankowskyOther Gardenia 23 in the reference
Gardenia brighamii Hawaiian gardenia Photo: CC BY-SA, Jackson Muth
Gardenia carinata Rubiaceae Photo: CC BY, Cheryl Stinchcomb
Gardenia cornuta Horned Gardenia Photo: CC BY-SA, Tony Rebelo
Gardenia coronaria Rubiaceae Photo: CC BY, Sabarni Sarker Gardenia gjellerupii Rubiaceae 
Gardenia gummifera Cumbi-gum tree Photo: CC BY, Harsha Jayaramaiah
Gardenia imperialis Rubiaceae Photo: CC BY, Robert Taylor
Gardenia jasminoides Cape jasmine Photo: CC BY, Toby Y
Gardenia latifolia Indian Boxwood Photo: CC BY, Ravuri Krishna Chaitanya
Gardenia mutabilis Rubiaceae Photo: CC BY-SA, 阿橋 HQ Gardenia posoquerioides Rubiaceae all 24 ›Names & registers
The record
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 answeredasked 2026-10-22gbif.synonyms answeredasked 2026-10-22gbif.vernacular answeredasked 2026-10-22names fetched 2026-10-22wcvp.distribution answeredas of 2026-06-04gbif.occurrences answeredas of 2026-10-21GBIF occurrence download https://doi.org/10.15468/dl.hbdw64, of 2026-10-21climate answeredasked 2026-10-22climate.extremes answeredasked 2026-10-22NASA POWER (MERRA-2) daily 1981–2024, cell -16.00_145.625, lapse-corrected +32 m at 6.5 °C/km; read, and set aside: NASA POWER's cell is mostly sea (20% land), so no cold floor is shownwikidata answeredasked 2026-10-22wikipedia answeredasked 2026-10-22inat.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 2026-10-22inat.photos.cultivated not askedgbif.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 rulesopenalex not askednot yet asked for this reference; a later fill takes the papers from OpenAlex's snapshotEvery 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 9 datasets via GBIF.org; each carries its own licence.