Example ⟳ +
An example collection, so you can see what this page does. Nothing added here is kept: leaving deletes it.
Cecropia pachystachya; photograph (c) avocat, some rights reserved (CC BY) CC BY(c) avocat, some rights reserved (CC BY) · observed growing wild · 2026-08-17

Cecropia pachystachya Trécul

Ambay pumpwood; Pumpwood

Urticaceae · Brazil West-Central, Brazil Northeast +5

Add one to my plants
Sow seed
Cecropia pachystachya, photograph (c) Parque Nacional da Serra do Cipó, some rights reserved (CC BY)Cecropia pachystachya, photograph (c) avocat, some rights reserved (CC BY)Cecropia pachystachya, photograph (c) avocat, some rights reserved (CC BY)Cecropia pachystachya, photograph (c) avocat, some rights reserved (CC BY)Cecropia pachystachya, photograph (c) Wallace Carneiro Almeida, some rights reserved (CC BY-SA)Cecropia pachystachya, photograph (c) Wallace Carneiro Almeida, some rights reserved (CC BY-SA) 67 photographs ›
Habitat figures
Cold floor (1 night in 100)
7.6°C
Record low 0.4 °C in 44 years, at a typical spot in the range NASA POWER
Warmest month, mean daily high
29°C
Jan and Feb at the habitat CHELSA
Rain a year (median across the range)
1,539mm
12 months of 25 mm or more in the median year CHELSA
Open-sky light
23–38DLI
Lowest to highest month (DLI) CHELSA
The year in your months, northern hemisphere
  1. Jan
  2. Feb
  3. Mar
  4. Apr
  5. May
  6. Jun
  7. Jul
  8. Aug
  9. Sep
  10. Oct
  11. Nov
  12. Dec
Wet summers: the rain comes April to September (October to March at the habitat), read as a summer growing season. rain rule, CHELSA
Northern hemisphere unless you set your site. The chart is in the habitat's months.

Summary

Cecropia pachystachya, commonly known as Ambay pumpwood, is a species of tree in the family Urticaceae. It is native to Argentina, Paraguay, Bolivia and Brazil where it grows near the edges of moist forests.

Quoted from Wikipedia, "Cecropia pachystachya", CC BY-SA 4.0.

Cultivation

Seasons

The rain rule reads a summer growing season: 70% of the median year's rain (1,066 mm of 1,476 mm) falls in October to March, warmer than the year (wet-season mean 24.5 °C against a yearly mean of 22.3 °C). Months are the habitat's, southern hemisphere; shifted six months for a northern-hemisphere collection: April to September.

Rain

1,476 mm in the median year at the habitat, 1,066 mm of it October to March. Wettest month January at 215 mm, driest month August at 39 mm. Across the grid cells of the range the year's total runs 1,268 mm to 1,996 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 1,539 mm, is the year's rain at the top of the page; the 1,476 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: 23 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 17, 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 7.6 °C, the absolute minimum 0.4 °C, no frost in 44 years (NASA POWER daily minima). Warmest: the 99th-percentile day is 38.5 °C. Monthly means: the coldest month's mean nightly low 13.9 °C in July (across the grid cells of the range 11.1 °C to 19.5 °C), the warmest month's mean daily high 28.8 °C in February (median year across the grid cells of the range, CHELSA). Cold floor: 7.6 °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: 59 to 64% 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 +61 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, southern hemisphere

Habitat climate of Cecropia pachystachya through the yearWarmest months January and February, mean daily high 29 °C; coldest month July, mean nightly low 13.9 °C; 1,476 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, southern hemisphere.-10°0°10°20°30°40°frost38.5° 99th-percentile day, NASA POWER0.4° lowest night in 44 years, NASA POWER°C · day and nightcold quarter0100200300400mm rainDLI 23–38RH 59–64%JanFebMarAprMayJunJulAugSepOctNovDec
day night rain medians and 10th–90th percentile across 360 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 °C29 / 26–3229 / 26–3128 / 26–3027 / 25–2924 / 22–2823 / 20–2823 / 20–2825 / 22–3026 / 23–3127 / 24–3128 / 25–3028 / 25–31
Night °C22 / 18–2422 / 18–2421 / 18–2419 / 17–2316 / 14–2114 / 12–2014 / 11–2015 / 12–2017 / 14–2118 / 16–2219 / 17–2321 / 18–23
Rain mm215 / 130–314167 / 103–241171 / 128–254115 / 70–20579 / 28–16752 / 7–13844 / 6–12639 / 15–9881 / 40–154137 / 95–202176 / 129–232200 / 137–307
DLI37 / 34–4337 / 35–4034 / 32–3529 / 25–3324 / 20–3123 / 17–3024 / 19–3128 / 24–3632 / 28–3936 / 32–3938 / 34–4137 / 33–43
RH %64 / 58–6763 / 60–6763 / 60–6762 / 59–6762 / 56–6662 / 53–6561 / 51–6559 / 49–6559 / 50–6560 / 56–6661 / 58–6663 / 58–67
How this section is made
Each figure is the median across the 360 grid cells on land that hold in-range records (538 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 2224:2633 (-21.225, -48.325). Over 44 years there: absolute minimum 0.4 °C, 1st-percentile night 7.6 °C, 99th-percentile day 38.5 °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 360 distinct grid cells holding 538 of the 539 in-range records (1 further cell with records at sea, by the elevation layer, left out); extremes and elevation at the typical cell 2224:2633 (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 -21.00_-48.125, lapse-corrected +61 m at 6.5 °C/km. Elevation: ETOPO 2022, 631 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.
NativeBrazil West-Central, Brazil Northeast, Brazil Southeast, Brazil North, Brazil South, Argentina Northeast, Paraguay · introduced: Jawa, Malaya, Cook 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-25.623, -54.47 · in the densest population, 633 records (46% of those in range)
Kew's description“tree” · “seasonally dry tropical” · quoted from WCVP, RBG Kew (CC BY 4.0); not derived here
Evidence usedThe map marker rests on all 1364 georeferenced records inside the native range; the climate across the range on the 538 of them in the land cells it reads, of 539 placed to within 10 km; the map shows only the 934 openly licensed ones, which alone would put the marker 65 km away. 97 records outside the WCVP native range not used. 825 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 1364 in-range records; it decides nothing. Records outside the native range, living specimens and records marked introduced are not used; which records count.

Photographs

Cecropia pachystachya, photograph 1did not loadCecropia pachystachya, photograph 2did not loadCecropia pachystachya, photograph 3did not loadCecropia pachystachya, photograph 4did not loadCecropia pachystachya, photograph 5did not loadCecropia pachystachya, photograph 6did not load

Photographs: (c) Parque Nacional da Serra do Cipó, some rights reserved (CC BY); (c) avocat, some rights reserved (CC BY) (3); (c) Wallace Carneiro Almeida, 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.

Dioscorea dodecaneura Dioscorea dodecaneura Ornamental yam Photo: CC BY, Paulo MascarettiVriesea fenestralis Vriesea fenestralis Bromeliaceae Photo: CC BY, Diogo LuizAlternanthera brasiliana Alternanthera brasiliana Brazilian joyweed Photo: CC BY, Richard LittauerEvolvulus glomeratus Evolvulus glomeratus Brazilian dwarf morning-glory Photo: CC BY, Diogo LuizCatasetum fimbriatum Catasetum fimbriatum Orchidaceae Photo: CC BY, Celso Henrique Varela RiosPereskia grandifolia Pereskia grandifolia Rose cactus Photo: CC0, author not stated

Other Cecropia 15 in the reference

Cecropia angustifolia Cecropia angustifolia Urticaceae Photo: CC BY, José Javier Barrios FloresCecropia concolor Cecropia concolor Urticaceae Photo: CC BY, Diogo LuizCecropia ficifolia Cecropia ficifolia Urticaceae Photo: CC BY, Yuri SofronovCecropia glaziovii Cecropia glaziovii Umbauba Photo: CC0, author not statedCecropia hololeuca Cecropia hololeuca Urticaceae Photo: CC0, author not statedCecropia insignis Cecropia insignis Urticaceae Photo: CC BY, Amber M. KingCecropia litoralis Cecropia litoralis Urticaceae Photo: CC BY, Raúl A. Ruiz M.Cecropia membranacea Cecropia membranacea Urticaceae Photo: CC BY-SA, MK MalikCecropia obtusifolia Cecropia obtusifolia Trumpet tree Photo: CC BY, José Javier Barrios FloresCecropia palmata Cecropia palmata Snakewoodtree Photo: CC BY, Marcello Mastroianni Albuquerque AraújoCecropia peltata Cecropia peltata Trumpet-tree Photo: CC BY, José Javier Barrios FloresCecropia polystachya Cecropia polystachya White cecropia Photo: CC BY-SA, Kozue Kawakami all 16 ›

Names & registers

Also known as Ambaiba adenopus; Ambaiba carbonaria; Ambaiba cinerea; Ambaiba cyrtostachya; Ambaiba lyratiflora and 19 more. (GBIF Backbone)

Under another author Cecropia peltata Vell. is an older name of this species, not Cecropia peltata, a species of the reference. (GBIF Backbone)

GBIFPOWOIPNIWFOWikidataWikipediaiNaturalist

The record

Family
Urticaceae
Described by
Trécul
Native to
Brazil West-Central, Brazil Northeast, Brazil Southeast +4
Wild records
1364 in range · 934 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; 37 records within 1 km of a botanic garden, herbarium or zoo left out (23 at a botanic garden or arboretum, 4 at a herbarium, 10 at a zoo; 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 -21.00_-48.125, lapse-corrected +61 m at 6.5 °C/km
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 142 datasets via GBIF.org; each carries its own licence.

Cultifolio

Opening your plants…