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Barringtonia edulis; photograph (c) Jay Pruett, some rights reserved (CC BY) CC BY(c) Jay Pruett, some rights reserved (CC BY) · observed growing wild · 2017-07-10

Barringtonia edulis Seem.

Cutnut; Vutu kana

Lecythidaceae · Fiji, Vanuatu

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Barringtonia edulis, photograph (c) Eric Knight, some rights reserved (CC BY)Barringtonia edulis, photograph (c) Jiro Iguchi, some rights reserved (CC BY)Barringtonia edulis, photograph (c) Mike Bowie, some rights reserved (CC BY)Barringtonia edulis, photograph (c) Mike Bowie, some rights reserved (CC BY)Barringtonia edulis, photograph (c) Ruth Palsson, some rights reserved (CC BY-SA)Barringtonia edulis, photograph (c) Ruth Palsson, some rights reserved (CC BY-SA) 22 photographs ›
Habitat figures
Coldest month, mean nightly low
22.8°C
Aug at the habitat, not a floor; extremes not used (sea cell) CHELSA
Warmest month, mean daily high
28°C
Feb and Mar at the habitat CHELSA
Rain a year (median across the range)
2,388mm
12 months of 25 mm or more in the median year CHELSA
Open-sky light
24–41DLI
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, November to May (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

Barringtonia edulis is a species of tree with edible fruits from the southwestern Pacific region, being found on Fiji and Vanuatu. Common names include cut nut, pao nut, boxfruit tree, heart tree, and yum-yum tree. It was first described in 1866 by Berthold Carl Seeman.

Quoted from Wikipedia, "Barringtonia edulis", CC BY-SA 4.0.

About the genus · Barringtonia

Barringtonia is a genus of flowering plants in the family Lecythidaceae first described as a genus with this name in 1775. It is native to Africa, southern Asia, Australia, and various islands of the Pacific and Indian Oceans. The genus name commemorates Daines Barrington.

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

Cultivation

Seasons

The rain rule reads a sharp season: 70% of the median year's rain (1,796 mm of 2,432 mm) falls in November to May. The temperature curve is flat, 3.2 °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, southern 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

2,432 mm in the median year at the habitat, 1,796 mm of it November to May. Wettest month March at 320 mm, driest month July at 97 mm. Across the grid cells of the range the year's total runs 1,966 mm to 3,996 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 2,388 mm, is the year's rain at the top of the page; the 2,432 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: 24 to 41 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 23, the highest 90th-percentile month 43).

Warmth and air
Temperature

Monthly means: the coldest month's mean nightly low 22.8 °C in August (across the grid cells of the range 21.0 °C to 24.1 °C), the warmest month's mean daily high 27.6 °C in February (median year across the grid cells of the range, CHELSA). Cold floor: none read. The nearest figure is 22.8 °C, the coldest month's mean nightly low, August, 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.

Humidity

Relative humidity at the habitat: 61 to 66% 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, southern hemisphere

Habitat climate of Barringtonia edulis through the yearWarmest months February and March, mean daily high 28 °C; coldest month August, mean nightly low 22.8 °C; 2,432 mm of rain in the median year (the twelve monthly medians added). Medians across the range, from CHELSA. Habitat months, southern hemisphere.20°25°30°°C · day and nightcold quarter0100200300400500mm rainDLI 24–41RH 61–66%JanFebMarAprMayJunJulAugSepOctNovDec
day night rain medians and 10th–90th percentile across 30 habitat cells, CHELSA cold quarter: the three months around the coldest month's mean nightly low DLI, mol/m²/dayRH %each on its own scale
Figures by month
JanFebMarAprMayJunJulAugSepOctNovDec
Day °C27 / 27–2828 / 27–2828 / 27–2827 / 26–2726 / 25–2725 / 24–2624 / 23–2524 / 23–2524 / 24–2625 / 24–2626 / 25–2727 / 26–28
Night °C26 / 24–2626 / 24–2626 / 24–2625 / 24–2625 / 23–2524 / 22–2523 / 21–2423 / 21–2423 / 21–2424 / 22–2525 / 23–2525 / 24–26
Rain mm288 / 244–400302 / 228–376320 / 275–394290 / 211–457201 / 160–349159 / 110–27197 / 77–225117 / 76–220118 / 69–233145 / 91–278185 / 128–398210 / 165–395
DLI41 / 38–4239 / 36–4036 / 34–3631 / 29–3226 / 25–2824 / 23–2624 / 23–2728 / 27–3134 / 32–3539 / 36–4040 / 38–4241 / 39–43
RH %66 / 64–7166 / 64–7166 / 64–7165 / 63–7163 / 61–6962 / 60–6961 / 59–6661 / 59–6662 / 59–6763 / 60–6864 / 62–7065 / 63–70

The daily extremes were read at a NASA POWER cell that is 4% 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 19.1 °C, 1st-percentile night 21.7 °C, 99th-percentile day 29.2 °C.

How this section is made
Each figure is the median across the 30 grid cells holding the 49 in-range records, 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 2155:6971 (-17.775, 168.575). 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 30 distinct grid cells holding 49 of the 49 in-range records; extremes and elevation at the typical cell 2155:6971 (its coldest month's mean nightly low nearest the median across cells, though its NASA POWER cell is only 4% land and none of the 11 next candidates within 2 °C of the median was mostly land); its position is the cell centre. Extremes: NASA POWER (MERRA-2) daily 1981–2024, cell -18.00_168.750, lapse-corrected -1 m at 6.5 °C/km. Elevation: ETOPO 2022, 9 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.
NativeFiji, Vanuatu · 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 marker-16.778, 168.267 · in the densest population, 77 records (72% 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 107 georeferenced records inside the native range; the climate across the range on the 49 of them placed to within 10 km; the map shows only the 68 openly licensed ones, which alone would put the marker 308 km away. 36 records outside the WCVP native range not used. 58 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 2° block of the 107 in-range records; it decides nothing. Records outside the native range, living specimens and records marked introduced are not used; which records count.

Photographs

Barringtonia edulis, photograph 1did not loadBarringtonia edulis, photograph 2did not loadBarringtonia edulis, photograph 3did not loadBarringtonia edulis, photograph 4did not loadBarringtonia edulis, photograph 5did not loadBarringtonia edulis, photograph 6did not load

Photographs: (c) Eric Knight, some rights reserved (CC BY); (c) Jiro Iguchi, some rights reserved (CC BY); (c) Mike Bowie, some rights reserved (CC BY) (2); (c) Ruth Palsson, some rights reserved (CC BY-SA) (2).

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

Heliotropium anomalum Heliotropium anomalum Polynesian heliotrope Photo: CC BY, Neal KelsoLepidium bidentatum Lepidium bidentatum Kunana pepperwort Photo: CC BY, Kevin Faccenda Solanum viride Solanaceae Metrosideros vitiensis Metrosideros vitiensis Myrtaceae Photo: CC BY, Neal KelsoSphaeropteris lunulata Sphaeropteris lunulata Balabala Photo: CC BY, Cheng-Wei CHENHernandia nymphaeifolia Hernandia nymphaeifolia Sea hearse Photo: CC BY, Brendan McIntyre

Other Barringtonia 12 in the reference

Barringtonia acutangula Barringtonia acutangula Freshwater mangrove Photo: CC BY, Alan BellBarringtonia asiatica Barringtonia asiatica Sea putat Photo: CC BY, Shelomi DoyleBarringtonia calyptrata Barringtonia calyptrata Corned Beef Wood Photo: CC BY-SA, Steve Fitzgerald Barringtonia conoidea Lecythidaceae Barringtonia fusicarpa Lecythidaceae Barringtonia macrocarpa Barringtonia macrocarpa Lecythidaceae Photo: CC BY, luluchouetteBarringtonia macrostachya Barringtonia macrostachya Lecythidaceae Photo: CC BY, Adam KamalBarringtonia neocaledonica Barringtonia neocaledonica Lecythidaceae Photo: CC0, author not stated Barringtonia procera Cutnut Barringtonia racemosa Barringtonia racemosa China-pine Photo: CC BY, Saryu Mae 前 朝琉 Barringtonia reticulata Lecythidaceae Barringtonia samoensis Barringtonia samoensis Lecythidaceae Photo: CC BY, Ben Hayden

Names & registers

Also known as Butonica edulis; Huttum edule. (GBIF Backbone)

GBIFPOWOIPNIWFOWikidataWikipediaiNaturalist

The record

Family
Lecythidaceae
Described by
Seem.
Native to
Fiji, Vanuatu
Wild records
107 in range · 68 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 2026-10-21
GBIF species record gbif.species answeredasked 2026-10-21
GBIF synonyms gbif.synonyms answeredasked 2026-10-21
GBIF common names gbif.vernacular answeredasked 2026-10-21names fetched 2026-10-21
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; 11 records within 1 km of a botanic garden, herbarium or zoo left out (11 at a botanic garden or arboretum; Wikidata's list)
Habitat climate climate answeredasked 2026-10-21
Daily extremes (NASA POWER) climate.extremes answeredasked 2026-10-21NASA POWER (MERRA-2) daily 1981–2024, cell -18.00_168.750, lapse-corrected -1 m at 6.5 °C/km; read, and set aside: NASA POWER's cell is mostly sea (4% land), so no cold floor is shown
Wikidata wikidata answeredasked 2026-10-21
Wikipedia wikipedia answeredasked 2026-10-21
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 2026-10-21
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 12 datasets via GBIF.org; each carries its own licence.

Cultifolio

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