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Tarenna asiatica; photograph (c) P Jeganathan, some rights reserved (CC BY) CC BY(c) P Jeganathan, some rights reserved (CC BY) · observed growing wild · 2026-05-22

Tarenna asiatica (L.) Kuntze ex K.Schum.

Asiatic tarenna

Rubiaceae · Nansei-shoto, Taiwan +10

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Tarenna asiatica, photograph (c) Ramnarayan K, some rights reserved (CC BY)Tarenna asiatica, photograph (c) Ramnarayan K, some rights reserved (CC BY)Tarenna asiatica, photograph (c) Ramnarayan K, some rights reserved (CC BY)Tarenna asiatica, photograph (c) Suhel Quader, some rights reserved (CC BY)Tarenna asiatica, photograph (c) P Jeganathan, some rights reserved (CC BY)Tarenna asiatica, photograph (c) P Jeganathan, some rights reserved (CC BY) 71 photographs ›
Habitat figures
Cold floor (1 night in 100)
13.3°C
Record low 10.5 °C in 44 years, at a typical spot in the range NASA POWER
Warmest month, mean daily high
33°C
Apr at the habitat CHELSA
Rain a year (median across the range)
1,191mm
9 months of 25 mm or more in the median year CHELSA
Open-sky light
28–43DLI
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
A rainy season, May and July to November, neither the cool nor the warm half of the year. rain rule, CHELSA
Northern hemisphere unless you set your site. The chart is in the habitat's months.

Summary

Tarenna asiatica, the Asiatic tarenna, is a species of flowering plants in the family Rubiaceae.

Quoted from Wikipedia, "Tarenna asiatica", CC BY-SA 4.0.

Cultivation

Seasons

The rain rule reads a rainy season with no name: 70% of the median year's rain (856 mm of 1,116 mm) falls in May and July to November, whose mean temperature, 26.2 °C, is within half a degree of the year's, 25.7 °C, so it is neither the cooler nor the warmer part of the year. Months are the habitat's, northern hemisphere; shifted six months for a southern-hemisphere collection: January to May and November.

Rain

1,116 mm in the median year at the habitat, 856 mm of it May and July to November. Wettest month October at 210 mm, driest month February at 12 mm. Across the grid cells of the range the year's total runs 819 mm to 2,790 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 1,191 mm, is the year's rain at the top of the page; the 1,116 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: 28 to 43 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 18, the highest 90th-percentile month 44).

Warmth and air
Temperature

Coldest: the 1st-percentile night over 44 years at a typical spot in the range is 13.3 °C, the absolute minimum 10.5 °C, no frost in 44 years (NASA POWER daily minima). Warmest: the 99th-percentile day is 41.0 °C. Monthly means: the coldest month's mean nightly low 17.6 °C in January (across the grid cells of the range 14.5 °C to 20.9 °C), the warmest month's mean daily high 32.8 °C in April (median year across the grid cells of the range, CHELSA). Cold floor: 13.3 °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 64% 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 +92 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, northern hemisphere

Habitat climate of Tarenna asiatica through the yearWarmest month April, mean daily high 33 °C; coldest month January, mean nightly low 17.6 °C; 1,116 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, northern hemisphere.0°10°20°30°40°50°41.0° 99th-percentile day, NASA POWER10.5° lowest night in 44 years, NASA POWER°C · day and nightcold quarter0100200300400500mm rainDLI 28–43RH 56–64%JanFebMarAprMayJunJulAugSepOctNovDec
day night rain medians and 10th–90th percentile across 82 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 °C28 / 22–2930 / 22–3232 / 24–3533 / 25–3732 / 27–3829 / 26–3629 / 25–3429 / 25–3429 / 26–3328 / 25–3127 / 24–2927 / 22–28
Night °C18 / 15–2119 / 15–2221 / 17–2323 / 20–2624 / 20–2724 / 20–2723 / 19–2723 / 19–2723 / 19–2622 / 18–2520 / 17–2318 / 15–22
Rain mm17 / 2–13512 / 4–11021 / 10–15062 / 18–178108 / 58–24381 / 52–42399 / 61–349126 / 66–380157 / 99–381210 / 161–307156 / 53–30067 / 12–170
DLI33 / 19–3739 / 23–4143 / 30–4442 / 36–4440 / 34–4335 / 28–3732 / 25–3932 / 25–3834 / 30–3731 / 28–3328 / 22–3129 / 18–33
RH %59 / 54–6357 / 51–6156 / 49–6258 / 52–6560 / 53–6863 / 53–7364 / 54–7264 / 56–7164 / 58–7064 / 61–6863 / 60–6761 / 56–65
How this section is made
Each figure is the median across the 82 grid cells on land that hold in-range records (133 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 1565:5163 (11.725, 78.175). Over 44 years there: absolute minimum 10.5 °C, 1st-percentile night 13.3 °C, 99th-percentile day 41.0 °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 82 distinct grid cells holding 133 of the 136 in-range records (2 further cells with records at sea, by the elevation layer, left out); extremes and elevation at the typical cell 1565:5163 (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 11.50_78.125, lapse-corrected +92 m at 6.5 °C/km. Elevation: ETOPO 2022, 409 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.
NativeNansei-shoto, Taiwan, Assam, Bangladesh, India, Sri Lanka, Andaman Is., Laos, Myanmar, Thailand, Vietnam, Borneo · 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 marker24.35, 123.813 · in the densest population, 200 records (45% of those in range)
Kew's description“shrub or tree” · “wet tropical” · quoted from WCVP, RBG Kew (CC BY 4.0); not derived here
Evidence usedThe map marker rests on all 444 georeferenced records inside the native range; the climate across the range on the 133 of them in the land cells it reads, of 136 placed to within 10 km; the map shows only the 310 openly licensed ones, which alone would put the marker in the same place. 29 records outside the WCVP native range not used. 308 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.
Other GBIF keysRecords also from GBIF's key 7884722 (Tarenna asiatica (L.) Kuntze ex Alston): Kew's file holds it as Tarenna asiatica (L.) Kuntze ex K.Schum. (accepted); 0 records, from GBIF's search API on the day of the build.Records also from GBIF's key 8316155 (Tarenna asiatica (L.) Kuntze): Kew's file holds it as Tarenna asiatica (L.) Kuntze ex K.Schum. (accepted); 0 records, from GBIF's search API on the day of the build.
How this section is made
The map marker: the openly licensed record nearest the middle of the densest 1° population of the 444 in-range records; it decides nothing. Records outside the native range, living specimens and records marked introduced are not used; which records count.

Photographs

Tarenna asiatica, photograph 1did not loadTarenna asiatica, photograph 2did not loadTarenna asiatica, photograph 3did not loadTarenna asiatica, photograph 4did not loadTarenna asiatica, photograph 5did not loadTarenna asiatica, photograph 6did not load

Photographs: (c) Ramnarayan K, some rights reserved (CC BY) (3); (c) Suhel Quader, some rights reserved (CC BY); (c) P Jeganathan, some rights reserved (CC BY) (2).

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

Commiphora caudata Commiphora caudata Hill-mango Photo: CC BY, P JeganathanAtalantia monophylla Atalantia monophylla Indian atalantia Photo: CC BY, Suhel QuaderAlpinia calcarata Alpinia calcarata Indian Ginger Photo: CC BY, Paulmathi VinodEuphorbia antiquorum Euphorbia antiquorum Triangular spurge Photo: CC BY, Raja Sekhar ChimiralaGloriosa superba Gloriosa superba Flame lily Photo: CC BY, Teja YantrapalliAbutilon hirtum Abutilon hirtum Florida Keys Indian mallow Photo: CC BY, J. L. Gómez-Hechavarría

Other Tarenna 4 in the reference

Tarenna fragrans Tarenna fragrans River Tarenna Photo: CC BY, grass_0Tarenna gracilipes Tarenna gracilipes Rubiaceae Photo: CC0, Mason Brock Tarenna madagascariensis Rubiaceae Tarenna pavettoides Tarenna pavettoides Rubiaceae Photo: CC BY, Sunčana Bradley

Names & registers

Also known as Canthium corymbosum; Chomelia asiatica; Chomelia corymbosa; Chomelia kotoensis; Cupia corymbosa and 22 more. (GBIF Backbone)

GBIFPOWOIPNIWFOWikidataWikipediaiNaturalist

The record

Family
Rubiaceae
Described by
(L.) Kuntze ex K.Schum.
Native to
Nansei-shoto, Taiwan, Assam +9
Wild records
444 in range · 310 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 answeredasked 2026-10-22GBIF occurrence download https://doi.org/10.15468/dl.hbdw64, of 2026-10-21; 0 records of GBIF's key 7884722, Tarenna asiatica (L.) Kuntze ex Alston (Kew's file holds it as Tarenna asiatica (L.) Kuntze ex K.Schum. (accepted)): GBIF occurrence search API; 0 records of GBIF's key 8316155, Tarenna asiatica (L.) Kuntze (Kew's file holds it as Tarenna asiatica (L.) Kuntze ex K.Schum. (accepted)): GBIF occurrence search API; 6 records within 1 km of a botanic garden, herbarium or zoo left out (3 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 11.50_78.125, lapse-corrected +92 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 35 datasets via GBIF.org; each carries its own licence.

Cultifolio

Opening your plants…