38 photographs › At a glance
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From few records: 4 records in 4 grid cells. The records.
Summary
Koompassia excelsa (known as tualang in Peninsular Malaysia, tapang in Sarawak, mangaris in Sabah, and bangris in Kalimantan) is an emergent tropical rainforest tree species in the family Fabaceae. It is found in Indonesia, Brunei, Malaysia, the Philippines, and Thailand. It is one of the tallest tropical tree species: the tallest measured specimen is 85.8 m or 88 m(281 or 289 ft) tall.
Quoted from Wikipedia, "Koompassia excelsa", CC BY-SA 4.0.
Cultivation
Seasons
The rain rule reads no short rainy season: 70% of the median year's rain (2,387 mm of 3,351 mm) takes 8 months, September to January and March to May. Mean temperature moves 1.2 °C between the warmest and coldest month. Months are the habitat's, northern hemisphere. The habitat lies within 10° of the equator, where the shift rule does not apply, so they are not shifted for a collection elsewhere.
Rain
3,351 mm in the median year at the habitat, 2,387 mm of it September to January and March to May. Wettest month January at 375 mm, driest month June at 223 mm. Across the grid cells of the range the year's total runs 2,853 mm to 4,613 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 3,287 mm, is the year's rain at the top of the page; the 3,351 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: 26 to 35 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 24, the highest 90th-percentile month 36).
Warmth and air
Coldest: the 1st-percentile night over 44 years at a typical spot in the range is 18.6 °C, the absolute minimum 16.6 °C, no frost in 44 years (NASA POWER daily minima). Warmest: the 99th-percentile day is 28.5 °C. Monthly means: the coldest month's mean nightly low 20.7 °C in January (across the grid cells of the range 20.3 °C to 22.1 °C), the warmest month's mean daily high 28.7 °C in April (median year across the grid cells of the range, CHELSA). Cold floor: 18.6 °C, which is the 1st-percentile night over 44 years at a typical spot in the range (NASA POWER).
Relative humidity at the habitat: 69 to 74% 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 +285 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
From few records: this habitat climate is read from 4 records in 4 grid cells; a page says so under 12 records or 5 cells, and shows the figures as read.
Habitat months, northern hemisphere
Mean daily high from 27 °C in Jan, Feb and Dec to 29 °C in Apr and May; mean nightly low from 21 °C in Jan, Feb, Mar, Apr, Jun, Jul, Aug, Sep, Oct, Nov and Dec to 22 °C in May. The cold quarter, Oct to Dec, is the three months around the coldest month's mean nightly low, centred on the 11 months in a row that tie for it. 3,351 mm of rain in the median year (the twelve monthly medians added), the wettest month Jan. The bands show the 10th to 90th percentile across 4 habitat cells. Over 44 years at a typical spot in the range (NASA POWER) the absolute minimum was 16.6 °C and the 99th-percentile day 28.5 °C; neither is dated to a month. 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 / 27–28 | 27 / 27–29 | 28 / 28–29 | 29 / 28–30 | 29 / 28–30 | 28 / 28–29 | 28 / 27–29 | 28 / 28–30 | 28 / 28–30 | 28 / 27–29 | 28 / 27–29 | 27 / 27–28 |
| Night °C | 21 / 20–22 | 21 / 20–22 | 21 / 21–22 | 21 / 21–23 | 22 / 21–23 | 21 / 21–23 | 21 / 21–23 | 21 / 21–23 | 21 / 21–23 | 21 / 21–22 | 21 / 21–22 | 21 / 21–22 |
| Rain mm | 375 / 280–510 | 258 / 213–364 | 268 / 205–450 | 263 / 161–419 | 280 / 209–354 | 223 / 213–277 | 242 / 229–287 | 241 / 215–298 | 268 / 247–332 | 301 / 285–398 | 304 / 258–450 | 328 / 282–481 |
| DLI | 26 / 24–29 | 30 / 27–32 | 33 / 29–35 | 35 / 30–35 | 32 / 30–34 | 31 / 30–33 | 32 / 31–34 | 35 / 33–36 | 34 / 31–35 | 31 / 28–33 | 28 / 26–31 | 27 / 24–29 |
| RH % | 74 / 71–74 | 73 / 70–73 | 71 / 69–71 | 70 / 69–71 | 71 / 68–72 | 69 / 66–71 | 69 / 66–71 | 69 / 65–70 | 70 / 66–71 | 71 / 68–71 | 73 / 70–73 | 74 / 70–74 |
How this section is made
Natural habitat
How this section is made
Photographs
Photographs: (c) Tim, some rights reserved (CC BY) (5); (c) Adam Kamal, 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.
Nepenthes reinwardtiana Reinwardt's pitcher-plant Photo: CC BY, Steven Whitebread
Firmiana malayana Malvaceae Photo: CC BY, Kalvin Chan
Etlingera fimbriobracteata Zingiberaceae Photo: CC BY, Paul Prior Osmoxylon borneense Araliaceae 
Hoya lacunosa Apocynaceae Photo: CC BY, Teguh Paracostus paradoxus Costaceae Other Koompassia 1 in the reference
Names & registers
Also known as Abauria excelsa; Koompassia parviflora; Koompassia parvifolia. (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 2026-10-22
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 2026-10-21; 1 record within 1 km of a botanic garden, herbarium or zoo left out (1 at a herbarium; Wikidata's list)climate answeredasked 2026-10-22climate.extremes answeredasked 2026-10-22NASA POWER (MERRA-2) daily 1981–2024, cell 1.50_111.875, lapse-corrected +285 m at 6.5 °C/kmwikidata 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 7 datasets via GBIF.org; each carries its own licence.