Example ⟳ +
An example collection, so you can see what this page does. Nothing added here is kept: leaving deletes it.
Ptychosperma salomonense; photograph David J. Stang, CC BY-SA 4.0, via Wikimedia Commons CC BY-SADavid J. Stang, CC BY-SA 4.0, via Wikimedia Commons

Ptychosperma salomonense Burret

Arecaceae · New Guinea, Solomon Is.

Add one to my plants
Sow seed
Ptychosperma salomonense, photograph David J. Stang, CC BY-SA 4.0, via Wikimedia CommonsPtychosperma salomonense, photograph David J. Stang, CC BY-SA 4.0, via Wikimedia CommonsPtychosperma salomonense, photograph David J. Stang, CC BY-SA 4.0, via Wikimedia CommonsPtychosperma salomonense, photograph David J. Stang, CC BY-SA 4.0, via Wikimedia CommonsPtychosperma salomonense, photograph David J. Stang, CC BY-SA 4.0, via Wikimedia CommonsPtychosperma salomonense, photograph David J. Stang, CC BY-SA 4.0, via Wikimedia Commons 12 photographs ›
Habitat figuresfrom few records
Coldest month, mean nightly low
25.0°C
Aug at the habitat, not a floor; extremes not used (sea cell) CHELSA
Warmest month, mean daily high
28°C
Jan, Feb, Mar, Apr, May, Jun, Oct, Nov and Dec at the habitat CHELSA
Rain a year (median across the range)
2,956mm
12 months of 25 mm or more in the median year CHELSA
Open-sky light
28–38DLI
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
Rain spread: 70% of the median year's rain takes 8 months, so no short rainy season. rain rule, CHELSA
Not shifted: the shift rule does not apply to this habitat. The chart is in the habitat's months.

From few records: 4 records in 4 grid cells. The records.

About the genus · Ptychosperma

Ptychosperma is a genus of flowering plant in the family Arecaceae. Most are native to Australia and/or New Guinea, with a few in the Solomon Islands and in Maluku Province of eastern Indonesia. Some have been cultivated abroad as house or garden plants, and reportedly naturalized in certain regions

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

Cultivation

Seasons

The rain rule reads no short rainy season: 70% of the median year's rain (2,134 mm of 2,986 mm) takes 8 months, December to March, May, July and September to October. Mean temperature moves 1.0 °C between the warmest and coldest month. Months are the habitat's, southern 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

2,986 mm in the median year at the habitat, 2,134 mm of it December to March, May, July and September to October. Wettest month February at 352 mm, driest month November at 200 mm. Across the grid cells of the range the year's total runs 2,540 mm to 3,694 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 2,956 mm, is the year's rain at the top of the page; the 2,986 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: 28 to 38 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 27, the highest 90th-percentile month 39).

Warmth and air
Temperature

Monthly means: the coldest month's mean nightly low 25.0 °C in August (across the grid cells of the range 24.7 °C to 25.2 °C), the warmest month's mean daily high 28.1 °C in December (median year across the grid cells of the range, CHELSA). Cold floor: none read. The nearest figure is 25.0 °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: 67 to 68% 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

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, southern hemisphere

Habitat climate of Ptychosperma salomonense through the yearWarmest months January, February, March, April, May, June, October, November and December, mean daily high 28 °C; coldest month August, mean nightly low 25.0 °C; 2,986 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 28–38RH 67–68%JanFebMarAprMayJunJulAugSepOctNovDec
day night rain medians and 10th–90th percentile across 4 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 °C28 / 28–2928 / 28–2928 / 28–2928 / 28–2928 / 28–2828 / 27–2827 / 27–2827 / 27–2827 / 27–2828 / 27–2828 / 28–2928 / 28–29
Night °C26 / 25–2625 / 25–2626 / 25–2626 / 25–2626 / 25–2625 / 25–2625 / 25–2525 / 25–2525 / 25–2525 / 25–2625 / 25–2626 / 25–26
Rain mm299 / 278–330352 / 336–371297 / 295–316222 / 198–263226 / 179–294213 / 151–353266 / 180–402217 / 156–332236 / 164–295231 / 182–284200 / 174–229227 / 215–237
DLI36 / 34–3634 / 33–3535 / 34–3533 / 33–3430 / 30–3028 / 28–2828 / 27–2931 / 31–3135 / 35–3537 / 37–3838 / 38–3937 / 36–38
RH %67 / 66–6867 / 66–6967 / 66–6967 / 65–6968 / 65–6967 / 65–6868 / 65–6867 / 64–6767 / 65–6867 / 64–6867 / 64–6867 / 65–68

The daily extremes were read at a NASA POWER cell that is 20% 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 23.5 °C, 1st-percentile night 24.8 °C, 99th-percentile day 29.4 °C.

How this section is made
Each figure is the median across the 4 grid cells on land that hold in-range records (4 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 1982:6796 (-9.125, 159.825). 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 4 distinct grid cells holding 4 of the 5 in-range records (1 further cell with records at sea, by the elevation layer, left out); extremes and elevation at the typical cell 1982:6796 (its coldest month's mean nightly low nearest the median across cells, though its NASA POWER cell is only 20% land and none of the 3 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 -9.00_160.000, lapse-corrected +155 m at 6.5 °C/km. Elevation: ETOPO 2022, 174 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.
NativeNew Guinea, Solomon Is. · 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-8.367, 159.8 · in the densest population, 5 records (56% 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 9 georeferenced records inside the native range; the climate across the range on the 4 of them in the land cells it reads, of 5 placed to within 10 km, all openly licensed and shown on the map. 7 records outside the WCVP native range not used. Under a dozen records behind the map and the climate. 4 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 of the 9 in-range records; it decides nothing. Records outside the native range, living specimens and records marked introduced are not used; which records count.

Photographs

Ptychosperma salomonense, photograph 1did not loadPtychosperma salomonense, photograph 2did not loadPtychosperma salomonense, photograph 3did not loadPtychosperma salomonense, photograph 4did not loadPtychosperma salomonense, photograph 5did not loadPtychosperma salomonense, photograph 6did not load

Photographs: David J. Stang, CC BY-SA 4.0, via Wikimedia Commons (6).

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

Saccharum officinarum Saccharum officinarum Sugarcane Photo: CC BY-SA, Wallace Carneiro AlmeidaDendrobium gouldii Dendrobium gouldii Orchidaceae Photo: CC BY, bukoba_steveCycas rumphii Cycas rumphii Ceylon sago Photo: CC BY, Charmaine Chammy ThomasVandopsis lissochiloides Vandopsis lissochiloides Orchidaceae Photo: Public domain, GiovanelliGrammatophyllum scriptum Grammatophyllum scriptum Bell orchid Photo: CC BY, Ben CostamagnaNepenthes peltata Nepenthes peltata Nepenthaceae Photo: CC BY, Kleo Marlo Sialongo

Other Ptychosperma 7 in the reference

Ptychosperma ambiguum Arecaceae Ptychosperma cuneatum Arecaceae Ptychosperma elegans Ptychosperma elegans Alexander palm Photo: CC BY, Josiah Londerée Ptychosperma microcarpum Arecaceae Ptychosperma propinquum Ptychosperma propinquum Macarthur Palm Photo: CC BY, Donald Davesne Ptychosperma schefferi Arecaceae Ptychosperma waitianum Arecaceae

Names & registers

Also known as Ptychosperma kajewskii; Ptychosperma multiramosum; Ptychosperma pachycarpum; Strongylocaryum brassii; Strongylocaryum latius and 1 more. (GBIF Backbone)

GBIFPOWOIPNIWFOWikidataiNaturalist

The record

Family
Arecaceae
Described by
Burret
Native to
New Guinea, Solomon Is.
Wild records
9 in range · 9 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
Habitat climate climate answeredasked 2026-10-22
Daily extremes (NASA POWER) climate.extremes answeredasked 2026-10-22NASA POWER (MERRA-2) daily 1981–2024, cell -9.00_160.000, lapse-corrected +155 m at 6.5 °C/km; read, and set aside: NASA POWER's cell is mostly sea (20% land), so no cold floor is shown
Wikidata wikidata answeredasked 2026-10-22
Wikipedia wikipedia nothing to reportasked 2026-10-22
iNaturalist photographs, wild inat.photos.wild nothing to reportasked 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 nothing to reportasked 2026-10-22
Wikimedia Commons commons 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 7 datasets via GBIF.org; each carries its own licence.

Cultifolio

Opening your plants…