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Harrisia brookii; photograph (c) Stephanie Dolrenry, some rights reserved (CC BY-SA) CC BY-SA(c) Stephanie Dolrenry, some rights reserved (CC BY-SA) · observed growing wild · 2004-04-19

Harrisia brookii Britton

Brook's dildo

Cactaceae · Bahamas · listed by its family as a cactus or succulent

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Harrisia brookii, photograph Jeffdelonge, CC BY-SA 3.0, via Wikimedia CommonsHarrisia brookii, photograph Jeffdelonge, CC BY-SA 3.0, via Wikimedia CommonsHarrisia brookii, photograph El Funcionario, CC BY-SA 4.0, via Wikimedia CommonsHarrisia brookii, photograph El Funcionario, CC BY-SA 4.0, via Wikimedia CommonsHarrisia brookii, photograph El Funcionario, CC BY-SA 4.0, via Wikimedia Commons 6 photographs ›
Habitat figuresfrom few records
Coldest month, mean nightly low
22.9°C
Feb and Mar at the habitat, not a floor; extremes not used (sea cell) CHELSA
Warmest month, mean daily high
28°C
Jun, Jul, Aug and Sep at the habitat CHELSA
Rain a year (median across the range)
1,010mm
12 months of 25 mm or more in the median year CHELSA
Open-sky light
24–44DLI
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 May to November, read as a summer growing season. rain rule, CHELSA
Northern hemisphere unless you set your site. The chart is in the habitat's months.

From few records: 3 records in 3 grid cells. The records.

Summary

Harrisia brookii is a species of cactus found in the Bahamas.

Quoted from Wikipedia, "Harrisia brookii", CC BY-SA 4.0.

Cultivation

Grouped as a cactus or succulent, listed under the family Cactaceae in the archetype table, and Kew describes it as “succulent subshrub”.

Seasons

The rain rule reads a summer growing season: 70% of the median year's rain (763 mm of 1,008 mm) falls in May to November, warmer than the year (wet-season mean 26.8 °C against a yearly mean of 25.6 °C). Months are the habitat's, northern hemisphere; shifted six months for a southern-hemisphere collection: November to May.

Rain

1,008 mm in the median year at the habitat, 763 mm of it May to November. Wettest month October at 188 mm, driest months (2 at 46 mm). Across the grid cells of the range the year's total runs 1,003 mm to 1,011 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 1,010 mm, is the year's rain at the top of the page; the 1,008 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: 24 to 44 mol/m²/day across the year (daily light integral, median year across the grid cells of the range, CHELSA).

Warmth and air
Temperature

Monthly means: the coldest month's mean nightly low 22.9 °C in February and March (across the grid cells of the range 22.8 °C to 22.9 °C), the warmest month's mean daily high 28.4 °C in August (median year across the grid cells of the range, CHELSA). Cold floor: none read. The nearest figure is 22.9 °C, the coldest month's mean nightly low, February and March, 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: 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. 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.

Group. Listed under the family Cactaceae in the archetype table, and Kew describes it as “succulent subshrub”. A group is taken only where Kew's description of the species agrees with the table's listing. The table gives no figure and no prose; the cold floor is the habitat's alone.

Climate across the habitat

From few records: this habitat climate is read from 3 records in 3 grid cells; a page says so under 12 records or 5 cells, and shows the figures as read.

Habitat months, northern hemisphere

Habitat climate of Harrisia brookii through the yearWarmest months June, July, August and September, mean daily high 28 °C; coldest months February and March, mean nightly low 22.9 °C; 1,008 mm of rain in the median year (the twelve monthly medians added). Medians across the range, from CHELSA. Habitat months, northern hemisphere.20°25°30°°C · day and nightcold quarter050100150200mm rainDLI 24–44RH 59–64%JanFebMarAprMayJunJulAugSepOctNovDec
day night rain medians and 10th–90th percentile across 3 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 °C24 / 24–2424 / 24–2424 / 24–24252628 / 28–2828 / 28–2828282726 / 26–2625 / 25–25
Night °C23 / 23–2323 / 23–2323 / 23–2324 / 24–2425 / 25–25262727 / 27–2727 / 27–2726 / 26–262524 / 24–24
Rain mm53 / 52–5346 / 45–4649 / 49–5046 / 46–4711394 / 92–9460 / 60–6186 / 85–86111 / 111–112188 / 186–188111 / 110–11351 / 50–52
DLI26 / 26–2631 / 31–3137 / 37–374342 / 42–424344 / 44–444237 / 37–3731 / 31–3127 / 27–2724 / 24–24
RH %5959596062 / 62–63646362 / 62–6363626059

The daily extremes were read at a NASA POWER cell that is 28% 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 18.4 °C, 1st-percentile night 20.8 °C, 99th-percentile day 30.3 °C.

How this section is made
Each figure is the median across the 3 grid cells holding the 3 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 1341:2102 (22.925, -74.875). 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 3 distinct grid cells holding 3 of the 3 in-range records; extremes and elevation at the typical cell 1341:2102 (its coldest month's mean nightly low nearest the median across cells, though its NASA POWER cell is only 28% land and none of the 2 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 23.00_-75.000, lapse-corrected +6 m at 6.5 °C/km. Elevation: ETOPO 2022, 6 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.
NativeBahamas · 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 marker22.906, -74.874 · in the densest population, 4 records (80% of those in range)
Kew's description“succulent subshrub” · “seasonally dry tropical” · quoted from WCVP, RBG Kew (CC BY 4.0); not derived here
Evidence usedThe map marker rests on all 5 georeferenced records inside the native range; the climate across the range on the 3 of them placed to within 10 km; the map shows only the 4 openly licensed ones, which alone would put the marker 9 km away. Under a dozen records behind the map and the climate. 2 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 5 in-range records; it decides nothing. Records outside the native range, living specimens and records marked introduced are not used; which records count.

Photographs

Harrisia brookii, photograph 1did not loadHarrisia brookii, photograph 2did not loadHarrisia brookii, photograph 3did not loadHarrisia brookii, photograph 4did not loadHarrisia brookii, photograph 5did not load

Photographs: Jeffdelonge, CC BY-SA 3.0, via Wikimedia Commons (2); El Funcionario, CC BY-SA 4.0, via Wikimedia Commons (3).

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

Reynosia septentrionalis Reynosia septentrionalis Darling-plum Photo: CC BY, Alan Prather Croton eluteria Cascarilla Coccoloba krugii Coccoloba krugii Whitewood Photo: CC BY, Mario GuzmánCoccothrinax litoralis Coccothrinax litoralis Arecaceae Photo: CC BY, InAweofGod'sCreationStrumpfia maritima Strumpfia maritima Pride of Big Pine Photo: CC BY, Tom FieldZanthoxylum flavum Zanthoxylum flavum West Indian satinwood Photo: CC BY, Mario Guzmán

Other Harrisia 13 in the reference

Harrisia aboriginum Harrisia aboriginum Cactaceae Photo: CC0, author not statedHarrisia adscendens Harrisia adscendens Cactaceae Photo: CC0, author not statedHarrisia bonplandii Harrisia bonplandii Giant Red Dragon Apple Cactus Photo: CC BY, Barry StewartHarrisia caymanensis Harrisia caymanensis Cactaceae Photo: CC0, author not statedHarrisia divaricata Harrisia divaricata Cactaceae Photo: CC0, author not statedHarrisia eriophora Harrisia eriophora Fragrant prickly-apple Photo: CC BY, Yoannis DomínguezHarrisia fragrans Harrisia fragrans Caribbean apple cactus Photo: CC0, author not statedHarrisia gracilis Harrisia gracilis Cactaceae Photo: CC BY, Joshua HallHarrisia martinii Harrisia martinii Moon cactus Photo: CC BY-SA, Ruth PalssonHarrisia pomanensis Harrisia pomanensis Midnight-lady Photo: CC BY, Pablo H CapovillaHarrisia regelii Harrisia regelii Cactaceae Photo: CC BY, Tomás TamagnoHarrisia tetracantha Harrisia tetracantha Cactaceae Photo: CC0, author not stated all 14 ›

Names & registers

Also known as Cereus brookii. (GBIF Backbone)

GBIFPOWOIPNIWFOWikidataWikipediaiNaturalist

The record

Family
Cactaceae
Described by
Britton
Native to
Bahamas
Wild records
5 in range · 4 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 23.00_-75.000, lapse-corrected +6 m at 6.5 °C/km; read, and set aside: NASA POWER's cell is mostly sea (28% land), so no cold floor is shown
Wikidata wikidata answeredasked 2026-10-22
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 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 4 datasets via GBIF.org; each carries its own licence.

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