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Cyathea arborea; photograph (c) Abby Darrah, some rights reserved (CC BY) CC BY(c) Abby Darrah, some rights reserved (CC BY) · observed growing wild · 2026-03-16

Cyathea arborea (L.) Sm.

West Indian treefern

Cyatheaceae · Cuba, Dominican Republic +8

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Cyathea arborea, photograph (c) Guillaume Delaitre, some rights reserved (CC BY)Cyathea arborea, photograph (c) Guillaume Delaitre, some rights reserved (CC BY)Cyathea arborea, photograph (c) Guillaume Delaitre, some rights reserved (CC BY)Cyathea arborea, photograph (c) Guillaume Delaitre, some rights reserved (CC BY)Cyathea arborea, photograph (c) Guillaume Delaitre, some rights reserved (CC BY)Cyathea arborea, photograph (c) Guillaume Delaitre, some rights reserved (CC BY) 69 photographs ›
Habitat figures
Cold floor (1 night in 100)
19.7°C
Record low 16.6 °C in 44 years, at a typical spot in the range NASA POWER
Warmest month, mean daily high
28°C
Jun, Jul, Aug and Sep at the habitat CHELSA
Rain a year (median across the range)
2,125mm
12 months of 25 mm or more in the median year CHELSA
Open-sky light
29–42DLI
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, May to November (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

Cyathea arborea (vernacular English: West Indian treefern, vernacular Spanish: helecho gigante or palo camarón) is a plant of the family Cyatheaceae in the order Cyatheales.

Quoted from Wikipedia, "Cyathea arborea", CC BY-SA 4.0.

Cultivation

Seasons

The rain rule reads a sharp season: 70% of the median year's rain (1,498 mm of 2,092 mm) falls in May to November. The temperature curve is flat, 2.8 °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, northern 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

2,092 mm in the median year at the habitat, 1,498 mm of it May to November. Wettest month October at 251 mm, driest month February at 85 mm. Across the grid cells of the range the year's total runs 1,540 mm to 2,512 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 2,125 mm, is the year's rain at the top of the page; the 2,092 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: 29 to 42 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 26, 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 19.7 °C, the absolute minimum 16.6 °C, no frost in 44 years (NASA POWER daily minima). Warmest: the 99th-percentile day is 31.2 °C. Monthly means: the coldest month's mean nightly low 20.3 °C in February (across the grid cells of the range 16.9 °C to 22.6 °C), the warmest month's mean daily high 28.0 °C in August (median year across the grid cells of the range, CHELSA). Cold floor: 19.7 °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: 65 to 69% 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 +37 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, northern hemisphere

Habitat climate of Cyathea arborea through the yearWarmest months June, July, August and September, mean daily high 28 °C; coldest month February, mean nightly low 20.3 °C; 2,092 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, northern hemisphere.15°20°25°30°35°31.2° 99th-percentile day, NASA POWER16.6° lowest night in 44 years, NASA POWER°C · day and nightcold quarter0100200300400mm rainDLI 29–42RH 65–69%JanFebMarAprMayJunJulAugSepOctNovDec
day night rain medians and 10th–90th percentile across 156 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 °C25 / 23–2725 / 23–2826 / 23–2826 / 24–2927 / 25–2928 / 25–3028 / 25–3128 / 26–3128 / 26–3027 / 25–2926 / 24–2826 / 23–27
Night °C21 / 17–2320 / 17–2320 / 17–2321 / 18–2322 / 19–2423 / 20–2523 / 20–2523 / 21–2523 / 20–2523 / 20–2522 / 19–2421 / 18–23
Rain mm116 / 66–15785 / 56–11296 / 62–121146 / 88–212230 / 142–299166 / 118–226169 / 110–266217 / 141–277249 / 176–309251 / 187–323216 / 159–289151 / 91–201
DLI30 / 27–3335 / 32–3740 / 37–4142 / 39–4341 / 39–4241 / 39–4341 / 39–4340 / 38–4237 / 35–3833 / 31–3430 / 27–3229 / 26–32
RH %66 / 62–7165 / 61–7065 / 61–7066 / 62–7168 / 63–7367 / 63–7267 / 63–7367 / 63–7368 / 64–7369 / 65–7469 / 65–7368 / 63–71
How this section is made
Each figure is the median across the 156 grid cells holding the 382 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 1436:2279 (18.175, -66.025). Over 44 years there: absolute minimum 16.6 °C, 1st-percentile night 19.7 °C, 99th-percentile day 31.2 °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 156 distinct grid cells holding 382 of the 382 in-range records; extremes and elevation at the typical cell 1436:2279 (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 18.00_-66.250, lapse-corrected +37 m at 6.5 °C/km. Elevation: ETOPO 2022, 258 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.
NativeCuba, Dominican Republic, Haiti, Jamaica, Leeward Is. AB Ant, Puerto Rico, Windward Is., Venezuela, Colombia, Ecuador · 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 marker18.191, -66.092 · in the densest population, 332 records (51% of those in range)
Kew's description“wet tropical” · quoted from WCVP, RBG Kew (CC BY 4.0); not derived here
Evidence usedThe map marker rests on all 646 georeferenced records inside the native range; the climate across the range on the 382 of them placed to within 10 km; the map shows only the 293 openly licensed ones, which alone would put the marker 29 km away. 43 records outside the WCVP native range not used. 264 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 646 in-range records; it decides nothing. Records outside the native range, living specimens and records marked introduced are not used; which records count.

Photographs

Cyathea arborea, photograph 1did not loadCyathea arborea, photograph 2did not loadCyathea arborea, photograph 3did not loadCyathea arborea, photograph 4did not loadCyathea arborea, photograph 5did not loadCyathea arborea, photograph 6did not load

Photographs: (c) Guillaume Delaitre, some rights reserved (CC BY) (6).

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

Simarouba tulae Simarouba tulae Aceitillo falso Photo: CC BY-SA, Thibaud AronsonPilea inaequalis Pilea inaequalis West Indian clearweed Photo: CC BY, Matteo BellucciPolystachya concreta Polystachya concreta Greater yellowspike orchid Photo: CC BY, Brynn FrickeSenna nitida Senna nitida Hediondilla Photo: CC BY, Egor DyukarevElaphoglossum apodum Elaphoglossum apodum Dryopteridaceae Photo: CC BY, Matteo BellucciPassiflora rubra Passiflora rubra Snakeberry Vine Photo: CC BY-SA, Dairon Cuevas Riveras

Other Cyathea 12 in the reference

Cyathea caracasana Cyathea caracasana Cyatheaceae Photo: CC BY-SA, XemenenduraCyathea conjugata Cyathea conjugata Cyatheaceae Photo: CC BY, Luis G RestrepoCyathea costaricensis Cyathea costaricensis Cyatheaceae Photo: CC BY, Alexis López HernándezCyathea delgadii Cyathea delgadii Cyatheaceae Photo: CC0, author not statedCyathea divergens Cyathea divergens Cyatheaceae Photo: CC BY, Jonatan Castro Hernández Cyathea frigida Cyatheaceae Cyathea fulva Cyathea fulva Cyatheaceae Photo: CC BY, Neptalí Ramírez MarcialCyathea horrida Cyathea horrida Deepwoods fern Photo: CC BY, Karen Saunders Cyathea lasiosora Cyatheaceae Cyathea microdonta Cyathea microdonta Cyatheaceae Photo: CC BY, Gabriel FernandesCyathea phalerata Cyathea phalerata Cyatheaceae Photo: CC BY-SA, Wallace Carneiro Almeida Cyathea poeppigii Cyatheaceae

Names & registers

Also known as Cormophyllum arboreum; Cyathea arborea var. pusilla; Cyathea arborea var. regnellii; Cyathea guadalupensis; Cyathea guadeloupensis and 7 more. (GBIF Backbone)

GBIFPOWOIPNIWFOWikidataWikipediaiNaturalist

The record

Family
Cyatheaceae
Described by
(L.) Sm.
Native to
Cuba, Dominican Republic, Haiti +7
Wild records
646 in range · 293 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; 14 records within 1 km of a botanic garden, herbarium or zoo left out (9 at a botanic garden or arboretum, 1 at a herbarium, 4 at a zoo; Wikidata's list)
Habitat climate climate answeredasked 2026-10-22
Daily extremes (NASA POWER) climate.extremes answeredasked 2026-10-22NASA POWER (MERRA-2) daily 1981–2024, cell 18.00_-66.250, lapse-corrected +37 m at 6.5 °C/km
Wikidata wikidata answeredasked 2026-10-22IPNI and POWO linked by Kew's number for Cyathea arborea (L.) Sm. (the item's: IPNI 1125716-2, POWO 17071820-1)
Wikipedia wikipedia answeredasked 2026-10-22
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 2026-10-22
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 46 datasets via GBIF.org; each carries its own licence.

Cultifolio

Opening your plants…