70 photographs › At a glance
- Jan
- Feb
- Mar
- Apr
- May, shaded
- Jun, shaded
- Jul, shaded
- Aug, shaded
- Sep, shaded
- Oct
- Nov
- Dec
Summary
Aidia cochinchinensis is the type species of the genus Aidia, in the family Rubiaceae. It is native to south-central China, including Hainan, and Vietnam.
Quoted from Wikipedia, "Aidia cochinchinensis", CC BY-SA 4.0.
Cultivation
Seasons
The rain rule reads a sharp season: 70% of the median year's rain (2,251 mm of 3,001 mm) falls in May to September. The temperature curve is flat, 3.0 °C between the warmest and coldest month, so the growing-season rule does not infer a growing season from it. Months are the habitat's, northern hemisphere. The temperature curve moves under 4 °C between the warmest and coldest month, where the shift rule does not apply, so they are not shifted for a collection elsewhere.
Rain
3,001 mm in the median year at the habitat, 2,251 mm of it May to September. Wettest month June at 500 mm, driest months (2 at 17 mm). Across the grid cells of the range the year's total runs 2,802 mm to 3,053 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 3,002 mm, is the year's rain at the top of the page; the 3,001 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: 29 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 25, the highest 90th-percentile month 42).
Warmth and air
Monthly means: the coldest month's mean nightly low 23.7 °C in January (across the grid cells of the range 16.2 °C to 24.1 °C), the warmest month's mean daily high 30.5 °C in April (median year across the grid cells of the range, CHELSA). Cold floor: none read. The nearest figure is 23.7 °C, the coldest month's mean nightly low, January, 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: 59 to 69% 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
Habitat months, northern hemisphere
Mean daily high from 27 °C in Jan and Dec to 31 °C in Apr; mean nightly low from 24 °C in Jan, Feb and Dec to 27 °C in Apr. The cold quarter, Dec to Feb, is the three months around the coldest month's mean nightly low, centred on the 3 months in a row that tie for it. 3,001 mm of rain in the median year (the twelve monthly medians added), the wettest month Jun. The bands show the 10th to 90th percentile across 8 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 / 21–28 | 29 / 23–29 | 30 / 25–30 | 31 / 27–31 | 29 / 27–30 | 29 / 27–29 | 28 / 28–28 | 28 / 27–28 | 28 / 26–28 | 28 / 25–28 | 28 / 24–28 | 27 / 22–28 |
| Night °C | 24 / 16–24 | 24 / 17–24 | 25 / 19–25 | 27 / 22–27 | 26 / 23–26 | 26 / 23–26 | 26 / 24–26 | 25 / 23–26 | 25 / 22–25 | 25 / 21–25 | 25 / 19–25 | 24 / 17–25 |
| Rain mm | 17 / 17–50 | 17 / 16–70 | 29 / 28–110 | 88 / 83–165 | 335 / 323–343 | 500 / 437–513 | 438 / 367–447 | 497 / 419–506 | 481 / 375–485 | 298 / 235–300 | 219 / 181–230 | 82 / 76–87 |
| DLI | 34 / 28–34 | 39 / 31–39 | 42 / 34–42 | 40 / 34–40 | 32 / 30–32 | 29 / 29–29 | 30 / 30–31 | 29 / 29–30 | 29 / 28–29 | 29 / 27–29 | 29 / 25–29 | 30 / 25–30 |
| RH % | 61 / 60–63 | 60 / 59–63 | 59 / 59–63 | 61 / 61–64 | 67 / 66–67 | 69 / 67–69 | 69 / 67–69 | 69 / 67–69 | 69 / 68–69 | 68 / 66–68 | 66 / 63–66 | 62 / 61–62 |
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 21.6 °C, 1st-percentile night 23.4 °C, 99th-percentile day 32.4 °C.
How this section is made
Natural habitat
How this section is made
Photographs
Photographs: (c) 如此甚好, some rights reserved (CC BY); (c) 黃美滿, some rights reserved (CC BY) (2); (c) 許文俊, some rights reserved (CC BY-SA) (2); (c) Yinling Chen, some rights reserved (CC BY).
Related
Similar habitat climate The 6 nearest by mean daily high, mean nightly low and rain, month by month. How.
Elaeocarpus rugosus Elaeocarpaceae Photo: CC BY, T R Shankar Raman Walsura pinnata Meliaceae Sageraea elliptica Annonaceae 
Dasymaschalon dasymaschalum Annonaceae Photo: CC BY, Samuel Lee
Pterocarpus dalbergioides East Indian mahogany Photo: CC BY, P Jeganathan Walsura robusta Meliaceae Other Aidia 2 in the reference
Aidia pycnantha Rubiaceae Photo: CC0, author not stated
Aidia tomentosa Rubiaceae Photo: CC BY-SA, 阿橋 HQ Names & registers
Also known as Aidia cochinchinensis subsp. angustifolia; Aidia oxyodonta subsp. microdonta; Aidia oxyodonta var. microdonta; Randia cochinchinensis; Randia densiflora subsp. angustifolia and 2 more. (GBIF Backbone)
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 2026-10-21
gbif.species answeredasked 2026-10-21gbif.synonyms answeredasked 2026-10-21gbif.vernacular answeredasked 2026-10-21names fetched 2026-10-21wcvp.distribution answeredas of 2026-06-04gbif.occurrences answeredasked 2026-10-21GBIF occurrence download https://doi.org/10.15468/dl.hbdw64, of 2026-10-21; 422 records of GBIF's key 9482779, Randia cochinchinensis (Lour.) Merill, 1935 (Kew's file holds it as Randia cochinchinensis (Lour.) Merr. (synonym under Aidia cochinchinensis Lour.)): GBIF occurrence search API; 13 records within 1 km of a botanic garden, herbarium or zoo left out (9 at a botanic garden or arboretum, 1 at a herbarium, 3 at a zoo; Wikidata's list)climate answeredasked 2026-10-21climate.extremes answeredasked 2026-10-21NASA POWER (MERRA-2) daily 1981–2024, cell 12.50_93.125, lapse-corrected +29 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 2026-10-21wikipedia answeredasked 2026-10-21inat.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 2026-10-21openalex 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 46 datasets via GBIF.org; each carries its own licence.