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Tetrameles nudiflora; photograph (c) sucker69420, some rights reserved (CC BY) CC BY(c) sucker69420, some rights reserved (CC BY) · observed growing wild · 2026-03-30

Tetrameles nudiflora R.Br.

Shidam tree

Tetramelaceae · China South-Central, Assam +18

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Tetrameles nudiflora, photograph (c) Swadha Pardesi, some rights reserved (CC BY)Tetrameles nudiflora, photograph (c) Swadha Pardesi, some rights reserved (CC BY)Tetrameles nudiflora, photograph (c) Swadha Pardesi, some rights reserved (CC BY)Tetrameles nudiflora, photograph (c) P Jeganathan, some rights reserved (CC BY)Tetrameles nudiflora, photograph (c) P Jeganathan, some rights reserved (CC BY)Tetrameles nudiflora, photograph (c) P Jeganathan, some rights reserved (CC BY) 103 photographs ›
Habitat figures
Cold floor (1 night in 100)
16.6°C
Record low 14.5 °C in 44 years, at a typical spot in the range NASA POWER
Warmest month, mean daily high
31°C
Apr at the habitat CHELSA
Rain a year (median across the range)
2,626mm
11 months of 25 mm or more in the median year CHELSA
Open-sky light
27–39DLI
Lowest to highest month (DLI) CHELSA
The year in the habitat's months, not shifted
  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 sharp rainy season, May to September (the habitat's months, not shifted), in a year of even temperature. rain rule, CHELSA
Not shifted: the shift rule does not apply to this habitat. The chart is in the habitat's months.

Summary

Tetrameles is a genus of flowering plants in the family Tetramelaceae with one species, Tetrameles nudiflora. It grows as a large deciduous tree and is found across southern Asia from India through southeast Asia, Malesia, and into northern Australia.

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

Cultivation

Seasons

The rain rule reads a sharp season: 70% of the median year's rain (1,663 mm of 2,273 mm) falls in May to September. The temperature curve is flat, 2.3 °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

2,273 mm in the median year at the habitat, 1,663 mm of it May to September. Wettest month August at 394 mm, driest month January at 18 mm. Across the grid cells of the range the year's total runs 1,458 mm to 3,988 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 2,626 mm, is the year's rain at the top of the page; the 2,273 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: 27 to 39 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 21, 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 16.6 °C, the absolute minimum 14.5 °C, no frost in 44 years (NASA POWER daily minima). Warmest: the 99th-percentile day is 38.2 °C. Monthly means: the coldest month's mean nightly low 19.1 °C in January (across the grid cells of the range 10.4 °C to 24.7 °C), the warmest month's mean daily high 30.7 °C in April (median year across the grid cells of the range, CHELSA). Cold floor: 16.6 °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: 58 to 70% 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 -122 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 Tetrameles nudiflora through the yearWarmest month April, mean daily high 31 °C; coldest month January, mean nightly low 19.1 °C; 2,273 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.5°10°15°20°25°30°35°40°38.2° 99th-percentile day, NASA POWER14.5° lowest night in 44 years, NASA POWER°C · day and nightcold quarter02004006008001000mm rainDLI 27–39RH 58–70%JanFebMarAprMayJunJulAugSepOctNovDec
day night rain medians and 10th–90th percentile across 165 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 / 22–3129 / 24–3330 / 27–3431 / 28–3429 / 27–3228 / 25–3128 / 24–3028 / 25–3028 / 26–3028 / 26–3028 / 24–3028 / 22–30
Night °C19 / 10–2520 / 12–2521 / 16–2523 / 19–2623 / 20–2623 / 20–2622 / 20–2622 / 20–2522 / 19–2522 / 18–2521 / 15–2520 / 12–25
Rain mm18 / 3–31129 / 4–29975 / 18–286129 / 50–260239 / 83–365324 / 79–732374 / 56–912394 / 59–635332 / 111–483229 / 89–40182 / 31–28348 / 8–210
DLI34 / 25–3736 / 30–4039 / 31–4338 / 31–4232 / 29–3728 / 23–3327 / 21–3228 / 23–3329 / 25–3729 / 26–3829 / 25–3831 / 23–36
RH %58 / 53–6758 / 52–6759 / 52–6764 / 56–6966 / 62–7169 / 64–7770 / 63–7970 / 63–7770 / 63–7567 / 62–7264 / 57–6861 / 53–67
How this section is made
Each figure is the median across the 165 grid cells on land that hold in-range records (364 records in those cells; 1 more cell holds records but no land by the elevation layer, so those records sit at sea and the cell is 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 1605:5136 (9.725, 76.825). Over 44 years there: absolute minimum 14.5 °C, 1st-percentile night 16.6 °C, 99th-percentile day 38.2 °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 165 distinct grid cells holding 364 of the 365 in-range records (1 further cell with records at sea, by the elevation layer, left out); extremes and elevation at the typical cell 1605:5136 (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 9.50_76.875, lapse-corrected -122 m at 6.5 °C/km. Elevation: ETOPO 2022, 298 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.
NativeChina South-Central, Assam, Bangladesh, East Himalaya, India, Nepal, Sri Lanka, Andaman Is., Cambodia, Laos, Myanmar, Thailand, Vietnam, Jawa, Lesser Sunda Is., Malaya, Sulawesi, Sumatera, New Guinea, Queensland · 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 marker13.433, 103.869 · in the densest population, 166 records (36% of those in range)
Kew's description“tree” · “wet tropical” · quoted from WCVP, RBG Kew (CC BY 4.0); not derived here
Evidence usedThe map marker rests on all 467 georeferenced records inside the native range; the climate across the range on the 364 of them in the land cells it reads, of 365 placed to within 10 km; the map shows only the 262 openly licensed ones, which alone would put the marker 923 km away. 3 records outside the WCVP native range not used. 102 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 inside the densest 4° block of the 467 in-range records; it decides nothing. Records outside the native range, living specimens and records marked introduced are not used; which records count.

Photographs

Tetrameles nudiflora, photograph 1did not loadTetrameles nudiflora, photograph 2did not loadTetrameles nudiflora, photograph 3did not loadTetrameles nudiflora, photograph 4did not loadTetrameles nudiflora, photograph 5did not loadTetrameles nudiflora, photograph 6did not load

Photographs: (c) Swadha Pardesi, some rights reserved (CC BY) (3); (c) P Jeganathan, some rights reserved (CC BY) (3).

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

Procris repens Procris repens Polynesian Ivy Photo: CC BY, Michael BerardozziPhalaenopsis deliciosa Phalaenopsis deliciosa Orchidaceae Photo: CC0, author not statedMussaenda frondosa Mussaenda frondosa Bangkok rose Photo: CC BY, rajesh rockyErythrina variegata Erythrina variegata Indian coral tree Photo: CC BY, ONG SOS BiodiversityDiospyros buxifolia Diospyros buxifolia Ebenaceae Photo: CC0, author not statedCalliandra magdalenae Calliandra magdalenae Fabaceae Photo: CC BY, Alexis López Hernández

Names & registers

Also known as Anictoclea grahamiana; Macaranga balakrishnanii; Tetrameles grahamiana; Tetrameles grahamiana var. ceylanica; Tetrameles horsfieldii and 1 more. (GBIF Backbone)

GBIFPOWOIPNIWFOWikidataWikipediaiNaturalist

The record

Family
Tetramelaceae
Described by
R.Br.
Native to
China South-Central, Assam, Bangladesh +17
Wild records
467 in range · 262 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; 5 records within 1 km of a botanic garden, herbarium or zoo left out (5 at a botanic garden or arboretum; 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 9.50_76.875, lapse-corrected -122 m at 6.5 °C/km
Wikidata wikidata answeredasked 2026-10-22
Wikipedia wikipedia answeredasked 2026-10-22Wikipedia redirects Tetrameles nudiflora to Tetrameles, this species' genus (Q15281786), which holds one accepted species in Kew's WCVP
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 36 datasets via GBIF.org; each carries its own licence.

Cultifolio

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