Species
+

Nepenthes reinwardtiana Miq.

Reinwardt's pitcher-plant

Climate known 31 photographs Carnivorous plant
Add one to my plants Sow seed

Every figure on this page is derived from public data by a stated rule and says its source; nothing here is written by a person or a model, except the Wikipedia passage, which is quoted and marked as such. How it is made.

Summary

Nepenthes reinwardtiana is a tropical pitcher plant native to Borneo and Sumatra and to a number of smaller surrounding islands including Bangka, Natuna, Nias, and Siberut. Although some sources have included Peninsular Malaysia and Singapore within the range of this species, these records appear to be erroneous.

Text from Wikipedia, “Nepenthes reinwardtiana”, CC BY-SA 4.0, quoted as written. Kept separate from everything derived here.

About the genus · Nepenthes

Nepenthes is a genus of carnivorous plants, also known as tropical pitcher plants, or monkey cups, in the monotypic family Nepenthaceae. The genus includes about 170 species, and numerous natural and many cultivated hybrids. They are mostly liana-forming plants of the Old World tropics, ranging from South China, Indonesia, Malaysia, and the Philippines; westward to Madagascar and the Seychelles (one); southward to Australia (four) and New Caledonia (one); and northward to India (one) and Sri Lanka (one). More on Wikipedia ›

The opening of Wikipedia, “Nepenthes”, CC BY-SA 4.0, quoted as written.

Family
Nepenthaceae
Described by
Miq.
Native to
Borneo, Sumatera
Wild records
272 in range· 103 open

At a glance

Warmest month
29°C
May, mean day; nights 22 °C (CHELSA)
Rain
3381mm/yr
12 wet months · peak Dec 350 mm (CHELSA)
Light
28–34DLI
mol/m²/day, winter to summer, open sky (CHELSA shortwave)
In short condensed by rule from the cultivation cards · not written by a person
Grouped as a carnivorous plant by the genus Nepenthes, which is reliably one kind of plant (archetype table). Rain rule: no season, 70% of the rain takes 8 months (September to January and March to May at the habitat (not shifted)). Habitat rain 3381 mm a year, wettest December at 350 mm, driest August at 224 mm (habitat calendar, northern hemisphere). Open sky over the habitat: 28 to 34 mol/m²/day. Cold floor 19.4 °C (1st-percentile habitat night, NASA POWER).
Each sentence is one card's own one-line form, written by the same rule as the card (Its year, Rain, Light, Temperature); the note cannot say what a card does not. Months are given for the northern hemisphere (set your site in Settings to change this), and the habitat's own alongside. The cards · the figures.

Also known as Nepenthes alata var. biflora Macfarl.; Nepenthes korthalsiana Macfad.; Nepenthes naquiyuddinii J.H.Adam & Hafiza; Nepenthes reinwardtiana var. samarindaiensis J.H.Adam & Wilcock; Nepenthes reinwardtii Hook.f. and 1 more.

Cultivation

Grouped as a carnivorous plant by the genus Nepenthes, which is reliably one kind of plant (archetype table). The table holds no figure for this group, which spans too much for one minimum; the cold floor is the habitat's alone, and no prose comes from the table.

Its year Rain rule: no season, 70% of the rain takes 8 months (September to January and March to May at the habitat (not shifted)).

This species’ habitat figures, and what two fixed rules read from them.

The rain rule reads no season: 70% of the year's rain (2447 mm of 3381 mm) takes 8 months, September to January and March to May. Mean temperature moves 1.0 °C between the warmest and coldest month. Months are the habitat's, northern hemisphere, within 10° of the equator; with no thermal season there there is no season to reverse, so they are not shifted for a collection elsewhere.

Read from the median year of CHELSA monthly rainfall and mean temperature across the envelope cells: 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 gives a season to reverse. A reading of the curves, not an observation of the plant.

Rain Habitat rain 3381 mm a year, wettest December at 350 mm, driest August at 224 mm (habitat calendar, northern hemisphere).

This species’ habitat figures, with their source.

3381 mm a year at the habitat, 2447 mm of it September to January and March to May. Wettest month December at 350 mm, driest August at 224 mm. Across the envelope cells the year's total runs 2489 mm to 4827 mm (10th to 90th percentile of each cell's own year) (median year across the envelope cells, CHELSA; habitat calendar, northern hemisphere).

CHELSA monthly precipitation, median year across the envelope cells. The rain that falls where the species is recorded; nothing about how the plant takes water.

Light Open sky over the habitat: 28 to 34 mol/m²/day.

This species’ habitat figures, with their source.

Open sky over the habitat: 28 to 34 mol/m²/day across the year (daily light integral, median year across the envelope cells, CHELSA; the lowest 10th-percentile month across the cells is 25, the highest 90th-percentile month 37).

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.

Warmth and air Cold floor 19.4 °C (1st-percentile habitat night, NASA POWER).

This species’ habitat figures, with their source.

Temperature

Coldest: the 1st-percentile night over 44 years at the typical cell is 19.4 °C, the absolute minimum 17.3 °C, no frost in 44 years (NASA POWER daily minima). Warmest: the 99th-percentile day is 29.6 °C. Monthly means: coldest night 20.8 °C in July (across the envelope cells 16.4 °C to 24.2 °C), warmest day 28.6 °C in May (median year across the envelope cells, CHELSA). Cold floor: 19.4 °C, which is the 1st-percentile night over 44 years at the typical cell (NASA POWER).

NASA POWER daily minima and maxima 1981–2024 at the typical cell, lapse-corrected to its elevation; CHELSA monthly means, median year across the envelope cells, CHELSA. The cold floor is the figure named in its sentence. Not a measured survival limit for any plant in a pot.

Humidity

Relative humidity at the habitat: 67 to 71% across the year (monthly means, median year across the envelope cells, CHELSA). A figure about the air, saying nothing about how the plant takes water.

CHELSA relative humidity, median year across the envelope cells.

The figures the cards read from are in Climate below, and where they came from in Natural habitat.

Climate across the habitat

Habitat climate through the yearMean day from 27 °C in Jan to 29 °C in May; mean night from 21 °C in Jul to 22 °C in May. The cold quarter, Jun to Aug, is the three months around the coldest night. 3381 mm of rain a year, most in Dec. The bands show the 10th to 90th percentile across 172 habitat cells. Over 44 years at the typical cell the absolute minimum was 17.3 °C and the 99th-percentile day 29.6 °C; neither is dated to a month. Beneath: daily light integral and relative humidity through the year, each on its own scale.15°20°25°30°35°29.6° 99th-percentile day (undated)17.3° lowest night in 44 yrs (undated)°C · day and nightcold quarter0100200300400500mm rainDLI 28–34RH 67–71 %JanFebMarAprMayJunJulAugSepOctNovDec
day night rain 10th–90th percentile across 172 habitat cells cold quarter: the three months around the coldest night extremes over 44 years at the typical cell, marked at the edge: undated DLI, mol/m²/dayRH %each on its own scale
Figures by month
JanFebMarAprMayJunJulAugSepOctNovDec
Day °C27 / 24–2928 / 24–3028 / 25–3029 / 25–3029 / 25–3028 / 25–3028 / 25–3028 / 25–3028 / 25–3128 / 24–3028 / 24–3027 / 24–29
Night °C21 / 17–2421 / 17–2421 / 17–2422 / 17–2422 / 17–2521 / 17–2421 / 16–2421 / 16–2421 / 17–2421 / 17–2421 / 17–2421 / 17–24
Rain mm313 / 204–462243 / 145–370300 / 176–441307 / 156–442275 / 206–376233 / 176–336234 / 171–337224 / 130–327260 / 163–413300 / 200–460342 / 215–488350 / 225–500
DLI29 / 26–3232 / 29–3533 / 30–3633 / 29–3631 / 29–3531 / 29–3432 / 29–3534 / 31–3734 / 31–3632 / 28–3529 / 25–3228 / 25–30
RH %70 / 67–7469 / 67–7269 / 67–7269 / 67–7269 / 67–7268 / 65–7168 / 65–7167 / 64–7168 / 64–7169 / 66–7271 / 68–7371 / 68–74

Each figure is the median across the 172 grid cells holding the 232 in-range records, with the 10th–90th percentile span across those cells after the slash where it differs. Extremes and elevation were read at the typical cell 1818:5646 (-0.925, 102.325). Over 44 years there: absolute minimum 17.3 °C, 1st-percentile night 19.4 °C, 99th-percentile day 29.6 °C. Normals: CHELSA V2.1 1981–2010 climatology, 0.05° cells (each the mean of ~36 1 km pixels). Envelope: median and 10th–90th percentile of each month across the 172 distinct grid cells holding the 232 in-range records; extremes and elevation at the typical cell 1818:5646 (its coldest month's mean night nearest the median across cells); its position is the cell centre. Extremes: NASA POWER (MERRA-2) daily 1981–2024, cell -1.00_102.500, lapse-corrected +206 m at 6.5 °C/km. Elevation: ETOPO 2022, 313 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 every in-range record's cell, not at the marker.
Openly licensed records inside the range, framed on where they fall.
NativeBorneo, Sumatera
Kew's description“climbing shrub or liana” · “wet tropical”· quoted from WCVP, RBG Kew (CC BY 4.0); not derived here
Map marker3.733, 115.483 · in the densest population, 102 records (38% of those in range)
Evidence usedThe map marker and the climate envelope rest on all 272 georeferenced records inside the native range; the map shows only the 103 openly licensed ones, which alone would put the marker 230 km away. 1 record outside the range (gardens, roadsides, misidentifications) ignored. 40 in-range records are placed to worse than 10 km and stay on the map but off the climate.
The map markerthe map marker: the openly licensed record nearest the middle of the densest 1° population of the 272 in-range records; it decides nothing.

Photographs

Nepenthes reinwardtianaNepenthes reinwardtianaNepenthes reinwardtianaNepenthes reinwardtianaNepenthes reinwardtianaNepenthes reinwardtianaNepenthes reinwardtianaNepenthes reinwardtiana

Photographs: (c) Stephanie Dolrenry, some rights reserved (CC BY-SA); (c) Eamonn Culhane, some rights reserved (CC BY); (c) 林正文, some rights reserved (CC BY) (2); (c) Steven Whitebread, some rights reserved (CC BY); no rights reserved · CC0; (c) Celestino Quintela Sabarís, some rights reserved (CC BY) (2).

Photographs: iNaturalist did not answer when this page was built; what is shown came from the sources that did.

Papers naming this species

Works whose title or abstract names Nepenthes reinwardtiana, most cited first, from OpenAlex (CC0). A mention, not a cultivation source: nothing on this page is drawn from them.

INVENTARISASI TUMBUHAN KANTONG SEMAR (Nepenthes spp) DI KECAMATAN SELEBAR KOTA BENGKULU
R. R. Sri Astuti, Rochmah Supriati, Gustina Dewi (2014) · University of Bengkulu Scholar Repository (University of Bengkulu)
Anatomical Characters Used for Defining Five Species of Nepenthes from Bangka Belitung Islands, Indonesia
Sakina Rizqiani, Nunik Sri Ariyanti, Sulistijorini Sulistijorini (2018) · Journal of Tropical Life Science
Feasibility of Submatery Documentary Film of Diversity Concepts, Types, Ecosystems Based on Nepenthes
Alexander Sardi, Syamswisna Syamswisna, Titin Titin (2021) · Journal of Mangifera Edu
KEANEKARAGAMAN NEPENTHES DI KECAMATAN SIPIROK
Nurmaini Ginting (2018) · BIOLINK (Jurnal Biologi Lingkungan Industri Kesehatan)
Keanekaragaman Jenis Kantong Semar (Nepenthes spp) di KHDTK Hutan Pendidikan Hampangen Universitas Palangka Raya
Patricia Erosa Putir, Eritha Kristiana Firdara, Nuwa Nuwa, Andreas J.F.S. (2022) · Daun Jurnal Ilmiah Pertanian dan Kehutanan
Population distribution patterns of Nepenthes reinwardtiana Miq. in Kerangas Forest of Teluk Adang Nature Reserve, Paser Regency
Ratna Juliarti Wulandari, Muhammad Sumaryono, Ali Suhardiman (2020) · Jurnal Penelitian Kehutanan Wallacea
Nepenthes reinwardtiana: Clarke, C.M.
IUCN (2014) · IUCN Red List of Threatened Species
Nepenthes reinwardtiana Miq.
Royal Botanic Garden Edinburgh (2026) · DiSSCo

Similar habitat climate the 6 species whose habitat climate is nearest this one's: mean day and night, month by month, and rain on a log scale, in calendar order, so a habitat with the same seasons six months out is far, not near. Nothing else counts: not range, not family.

Other Nepenthes 174 in the reference

History & registers

Where this page came from built 2026-09-20 · dossier v2 · node
gbif.species answeredcarried from build of 2026-09-19 (offline re-derivation; the backbone was not asked)
gbif.synonyms answeredcarried from build of 2026-09-19 (offline re-derivation; the backbone was not asked)
gbif.vernacular answeredcarried from build of 2026-09-19 (offline re-derivation; the backbone was not asked)
wcvp.distribution answered
gbif.occurrences answeredGBIF occurrence download https://doi.org/10.15468/dl.3h4zam
climate answered
wikidata answeredcarried from build of 2026-09-19 (rederive); that build: carried from build of 2026-09-19 (rederive)
wikipedia answeredcarried from build of 2026-09-19; this build: skipped
inat.taxon not asked
inat.photos.wild answeredcarried from build of 2026-09-19; this build: skipped
inat.photos.cultivated nothing to reportcarried from build of 2026-09-19 (rederive); that build: carried from build of 2026-09-19 (rederive)
commons nothing to reportcarried from build of 2026-09-19 (rederive); that build: carried from build of 2026-09-19 (rederive)
gbif.media answered
openalex answeredcarried from build of 2026-09-19; this build: skipped

Every upstream is recorded as having answered, reported nothing, or refused. Only “nothing to report” is ever shown as an absence. Records came from 9 datasets via GBIF.org; each carries its own licence.