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Cayratia acris; photograph Tony van Kampen, CC BY, iNaturalist via GBIF CC BYTony van Kampen, CC BY, iNaturalist via GBIF

Cayratia acris (F.Muell.) Domin

Hairy grape

Vitaceae · New Guinea, New South Wales +3

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Cayratia acris, photograph Tony van Kampen, CC BY, iNaturalist via GBIFCayratia acris, photograph Samuel Frankel, CC BY, iNaturalist via GBIFCayratia acris, photograph Tony van Kampen, CC BY, iNaturalist via GBIFCayratia acris, photograph Tony van Kampen, CC BY, iNaturalist via GBIFCayratia acris, photograph Tony van Kampen, CC BY, iNaturalist via GBIFCayratia acris, photograph Tony van Kampen, CC BY, iNaturalist via GBIF 21 photographs ›
Habitat figures
Cold floor (1 night in 100)
6.5°C
Record low 2.9 °C in 44 years, at a typical spot in the range NASA POWER
Warmest month, mean daily high
30°C
Jan and Dec at the habitat CHELSA
Rain a year (median across the range)
1,174mm
12 months of 25 mm or more in the median year CHELSA
Open-sky light
23–42DLI
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 October (November to April 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

Cayratia acris is a species of flowering plant in the family Vitaceae. It is native to Australia and Papua New Guinea.

Quoted from Wikipedia, "Cayratia acris", CC BY-SA 4.0.

About the genus · Cayratia

Cayratia is a genus of flowering plants in the family Vitaceae. It consists of species of vine plants, typical of the tribe Cayratieae. Some of them are used by humans, and they are found in tropical and subtropical areas of Asia, Africa, Australia, and islands of the Pacific Ocean.

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

Cultivation

Seasons

The rain rule reads a summer growing season: 70% of the median year's rain (843 mm of 1,091 mm) falls in November to April, warmer than the year (wet-season mean 24.5 °C against a yearly mean of 21.5 °C). Months are the habitat's, southern hemisphere; shifted six months for a northern-hemisphere collection: May to October.

Rain

1,091 mm in the median year at the habitat, 843 mm of it November to April. Wettest month February at 199 mm, driest month September at 29 mm. Across the grid cells of the range the year's total runs 751 mm to 1,847 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 1,174 mm, is the year's rain at the top of the page; the 1,091 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 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 20, the highest 90th-percentile month 45).

Warmth and air
Temperature

Coldest: the 1st-percentile night over 44 years at a typical spot in the range is 6.5 °C, the absolute minimum 2.9 °C, no frost in 44 years (NASA POWER daily minima). Warmest: the 99th-percentile day is 38.4 °C. Monthly means: the coldest month's mean nightly low 11.8 °C in July (across the grid cells of the range 7.4 °C to 21.9 °C), the warmest month's mean daily high 29.5 °C in January and December (median year across the grid cells of the range, CHELSA). Cold floor: 6.5 °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: 55 to 63% 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 -75 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 Cayratia acris through the yearWarmest months January and December, mean daily high 30 °C; coldest month July, mean nightly low 11.8 °C; 1,091 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.0°10°20°30°40°38.4° 99th-percentile day, NASA POWER2.9° lowest night in 44 years, NASA POWER°C · day and nightcold quarter0100200300400500mm rainDLI 23–42RH 55–63%JanFebMarAprMayJunJulAugSepOctNovDec
day night rain medians and 10th–90th percentile across 303 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 °C30 / 27–3229 / 26–3128 / 25–3226 / 23–3224 / 20–3121 / 18–3021 / 18–3022 / 19–3125 / 22–3327 / 24–3428 / 25–3430 / 27–32
Night °C22 / 19–2722 / 19–2621 / 17–2618 / 15–2616 / 12–2513 / 9–2312 / 7–2213 / 8–2215 / 11–2417 / 14–2619 / 16–2721 / 18–27
Rain mm161 / 94–420199 / 114–406144 / 67–34394 / 46–19156 / 15–11740 / 2–8531 / 2–5430 / 2–5229 / 5–5062 / 19–8492 / 65–142153 / 113–274
DLI40 / 34–4235 / 32–3834 / 32–3730 / 26–3725 / 21–3523 / 20–3325 / 21–3530 / 27–3837 / 34–4341 / 38–4542 / 39–4441 / 37–44
RH %62 / 59–6663 / 60–6762 / 59–6560 / 56–6459 / 54–6358 / 51–6156 / 53–6155 / 53–6156 / 53–6358 / 55–6259 / 56–6361 / 58–64
How this section is made
Each figure is the median across the 303 grid cells on land that hold in-range records (419 records in those cells; 12 more cells hold records but no land by the elevation layer, so those records sit at sea and the cells are 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 2267:6609 (-23.375, 150.475). Over 44 years there: absolute minimum 2.9 °C, 1st-percentile night 6.5 °C, 99th-percentile day 38.4 °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 303 distinct grid cells holding 419 of the 432 in-range records (12 further cells with records at sea, by the elevation layer, left out); extremes and elevation at the typical cell 2267:6609 (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 -23.50_150.625, lapse-corrected -75 m at 6.5 °C/km. Elevation: ETOPO 2022, 12 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, New South Wales, Northern Territory, Queensland, Western Australia · 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-27.9, 152.783 · in the densest population, 229 records (46% of those in range)
Kew's description“liana” · “seasonally dry tropical” · quoted from WCVP, RBG Kew (CC BY 4.0); not derived here
Evidence usedThe map marker rests on all 502 georeferenced records inside the native range; the climate across the range on the 419 of them in the land cells it reads, of 432 placed to within 10 km; the map shows only the 460 openly licensed ones, which alone would put the marker 13 km away. 10 records outside the WCVP native range not used. 70 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 2° block of the 502 in-range records; it decides nothing. Records outside the native range, living specimens and records marked introduced are not used; which records count.

Photographs

Cayratia acris, photograph 1did not loadCayratia acris, photograph 2did not loadCayratia acris, photograph 3did not loadCayratia acris, photograph 4did not loadCayratia acris, photograph 5did not loadCayratia acris, photograph 6did not load

Photographs: Tony van Kampen, CC BY, iNaturalist via GBIF (5); Samuel Frankel, CC BY, iNaturalist via GBIF.

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

Persicaria attenuata Persicaria attenuata Watersmart Weed Photo: CC0, author not statedMurdannia graminea Murdannia graminea Grass Lily Photo: CC0, author not statedDrypetes deplanchei Drypetes deplanchei Yellow Tulipwood Photo: CC BY-SA, Greg TasneyCorymbia tessellaris Corymbia tessellaris Moreton bay-ash Photo: CC0, author not statedDiospyros geminata Diospyros geminata Scaly ebony Photo: CC BY, Damien O'DonnellAbildgaardia ovata Abildgaardia ovata Flatspike sedge Photo: CC BY, chiuluan

Other Cayratia 2 in the reference

Cayratia auriculata Cayratia auriculata Vitaceae Photo: CC0, S.MORECayratia mollissima Cayratia mollissima Vitaceae Photo: CC BY, Teguh

Names & registers

Also known as Cissus acris; Cissus grandifolia; Vitis acris. (GBIF Backbone)

Kew accepts as species of their own Cayratia grandifolia: older names in GBIF's record of this species that Kew's World Checklist accepts as other species. (WCVP, RBG Kew, file of 2026-06-04)

GBIFPOWOIPNIWFOWikidataWikipedia

The record

Family
Vitaceae
Described by
(F.Muell.) Domin
Native to
New Guinea, New South Wales, Northern Territory +2
Wild records
502 in range · 460 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; 2 records within 1 km of a botanic garden, herbarium or zoo left out (2 at a botanic garden or arboretum; 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 -23.50_150.625, lapse-corrected -75 m at 6.5 °C/km
Wikidata wikidata answeredasked 2026-10-21
Wikipedia wikipedia answeredasked 2026-10-21
iNaturalist taxon inat.taxon not asked
iNaturalist photographs, wild inat.photos.wild not asked
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 21 datasets via GBIF.org; each carries its own licence.

Cultifolio

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