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Aristolochia kwangsiensis; photograph Anastasiya Lvova, CC BY-SA 4.0, via Wikimedia Commons CC BY-SAAnastasiya Lvova, CC BY-SA 4.0, via Wikimedia Commons

Aristolochia kwangsiensis Chun & F.C.How ex S.YunLiang

Aristolochiaceae · China South-Central, China Southeast +1

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Habitat figuresfrom few records
Cold floor (1 night in 100)
6.3°C
Record low 0.0 °C in 44 years, at a typical spot in the range NASA POWER
Warmest month, mean daily high
30°C
Jun, Jul and Aug at the habitat CHELSA
Rain a year (median across the range)
1,944mm
12 months of 25 mm or more in the median year CHELSA
Open-sky light
16–32DLI
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 September, 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: 5 records in 4 grid cells. The records.

About the genus · Aristolochia

Aristolochia is a large plant genus with over 500 species that is the type genus of the family Aristolochiaceae. Its members are commonly known as birthwort, pipevine or Dutchman's pipe and are widespread and occur in diverse climates. Some species, like A. utriformis and A. westlandii, are threatened with extinction.

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

Cultivation

Seasons

The rain rule reads a summer growing season: 70% of the median year's rain (1,413 mm of 1,908 mm) falls in May to September, warmer than the year (wet-season mean 26.7 °C against a yearly mean of 21.9 °C). Months are the habitat's, northern hemisphere; shifted six months for a southern-hemisphere collection: November to March.

Rain

1,908 mm in the median year at the habitat, 1,413 mm of it May to September. Wettest month August at 321 mm, driest month December at 27 mm. Across the grid cells of the range the year's total runs 1,702 mm to 2,498 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 1,944 mm, is the year's rain at the top of the page; the 1,908 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: 16 to 32 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 13, the highest 90th-percentile month 37).

Warmth and air
Temperature

Coldest: the 1st-percentile night over 44 years at a typical spot in the range is 6.3 °C, the absolute minimum 0.0 °C, no frost in 44 years (NASA POWER daily minima). Warmest: the 99th-percentile day is 34.3 °C. Monthly means: the coldest month's mean nightly low 10.6 °C in January (across the grid cells of the range 9.5 °C to 14.2 °C), the warmest month's mean daily high 29.9 °C in July (median year across the grid cells of the range, CHELSA). Cold floor: 6.3 °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: 60 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. NASA POWER daily minima and maxima over 44 years at a typical spot in the range, lapse-corrected -891 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

From few records: this habitat climate is read from 5 records in 4 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 Aristolochia kwangsiensis through the yearWarmest months June, July and August, mean daily high 30 °C; coldest month January, mean nightly low 10.6 °C; 1,908 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.-10°0°10°20°30°40°frost34.3° 99th-percentile day, NASA POWER0.0° lowest night in 44 years, NASA POWER°C · day and nightcold quarter0100200300400500mm rainDLI 16–32RH 60–68%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 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 °C17 / 16–1818 / 18–1922 / 21–2225 / 24–2628 / 27–2830 / 29–3030 / 30–3030 / 29–3029 / 28–2926 / 25–2722 / 22–2319 / 18–20
Night °C11 / 10–1412 / 11–1515 / 15–1719 / 18–2121 / 21–2423 / 23–2624 / 24–2624 / 23–2622 / 21–2419 / 18–2216 / 14–1912 / 10–16
Rain mm48 / 37–6245 / 36–12474 / 64–148120 / 102–165225 / 221–278296 / 290–339316 / 302–345321 / 270–431255 / 154–382123 / 93–17658 / 53–7927 / 26–55
DLI16 / 13–1817 / 14–2022 / 18–2527 / 24–3130 / 28–3330 / 28–3432 / 29–3730 / 29–3329 / 28–3025 / 25–2720 / 20–2317 / 17–19
RH %64 / 62–6565 / 64–6765 / 65–6865 / 65–6965 / 65–6868 / 64–6868 / 65–6867 / 66–6865 / 63–6661 / 60–6360 / 59–6260 / 59–62
How this section is made
Each figure is the median across the 4 grid cells holding the 5 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 1306:6021 (24.675, 121.075). Over 44 years there: absolute minimum 0.0 °C, 1st-percentile night 6.3 °C, 99th-percentile day 34.3 °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 4 distinct grid cells holding 5 of the 5 in-range records; extremes and elevation at the typical cell 1306:6021 (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 24.50_121.250, lapse-corrected -891 m at 6.5 °C/km. Elevation: ETOPO 2022, 329 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.
NativeChina South-Central, China Southeast, Vietnam · 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 marker22.391, 106.818 · in the densest population, 17 records (68% of those in range)
Range sourceKew's entry Aristolochia kwangsiensis Chun & F.C.How ex C.F.Liang · the range is that of Kew's entry of these words by another author than the one this page cites
Kew's description“liana” · “subtropical” · quoted from WCVP, RBG Kew (CC BY 4.0); not derived here
Evidence usedThe map marker rests on all 25 georeferenced records inside the native range; the climate across the range on the 5 of them placed to within 10 km; the map shows only the 6 openly licensed ones, which alone would put the marker 30 km away. Under a dozen records behind the climate. 20 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.
Other GBIF keysRecords also from GBIF's key 10961830 (Isotrema kwangsiense (Chun & F.C.How ex C.F.Liang) X.X.Zhu, S.Liao & J.S.Ma): Kew's file holds it as Isotrema kwangsiense (Chun & F.C.How ex C.F.Liang) X.X.Zhu, S.Liao & J.S.Ma (synonym under Aristolochia kwangsiensis Chun & F.C.How ex C.F.Liang); 0 records, from GBIF's search API on the day of the build.
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 25 in-range records; it decides nothing. Records outside the native range, living specimens and records marked introduced are not used; which records count.

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

Ficus triloba Ficus triloba Moraceae Photo: CC BY, 鄭雪雲Guihaia argyrata Guihaia argyrata Arecaceae Photo: Public domain, DaderotSonchus wightianus Sonchus wightianus Bitter sow-thistle Photo: CC BY, Emily FranzenRhododendron hongkongense Rhododendron hongkongense Hong Kong Azalea Photo: CC BY, Toby YPilea cadierei Pilea cadierei Aluminium Plant Photo: CC BY, Greg III EsperaBulbophyllum ambrosia Bulbophyllum ambrosia Orchidaceae Photo: CC0, author not stated

Other Aristolochia 77 in the reference

Aristolochia acuminata Aristolochia acuminata Indian birthwort Photo: CC BY, Cheongweei GanAristolochia anguicida Aristolochia anguicida Harlequin dutchman's pipe Photo: CC BY, Skjold SøndergaardAristolochia arborea Aristolochia arborea Aristolochiaceae Photo: CC BY-SA, Kurt StüberAristolochia arcuata Aristolochia arcuata Aristolochiaceae Photo: CC BY, Celso Henrique Varela RiosAristolochia argentina Aristolochia argentina Aristolochiaceae Photo: CC BY, Tomás TamagnoAristolochia australopithecurus Aristolochia australopithecurus Cairns Birdwing Butterfly plant Photo: CC0, Poyt448 Peter WoodardAristolochia baetica Aristolochia baetica Andalusian Dutchman's Pipe Photo: CC0, Alison Westwood Aristolochia bidoupensis Aristolochiaceae Aristolochia bottae Botta's birthwort Aristolochia bracteolata Aristolochia bracteolata Aristolochiaceae Photo: CC0, Jaya Rakesh Aristolochia caulialata Aristolochiaceae Aristolochia cauliflora Aristolochia cauliflora Aristolochiaceae Photo: CC BY-SA, Danny S. all 78 ›

Names & registers

Registers not checked Wikidata did not answer when this page was built, so the links it gives (POWO, IPNI, World Flora Online, Wikipedia) were not checked; any shown here are kept from an earlier build. Not asked, or not answered, is not "none": nothing here claims there is none. Why the site says it this way.
GBIF

The record

Family
Aristolochiaceae
Described by
Chun & F.C.How ex S.YunLiang
Native to
China South-Central, China Southeast, Vietnam
Wild records
25 in range · 6 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 2026-06-04the range is Kew's entry Aristolochia kwangsiensis Chun & F.C.How ex C.F.Liang; the name is cited Chun & F.C.How ex S.YunLiang
GBIF occurrence records gbif.occurrences answeredasked 2026-10-21GBIF occurrence download https://doi.org/10.15468/dl.hbdw64, of 2026-10-21; 0 records of GBIF's key 10961830, Isotrema kwangsiense (Chun & F.C.How ex C.F.Liang) X.X.Zhu, S.Liao & J.S.Ma (Kew's file holds it as Isotrema kwangsiense (Chun & F.C.How ex C.F.Liang) X.X.Zhu, S.Liao & J.S.Ma (synonym under Aristolochia kwangsiensis Chun & F.C.How ex C.F.Liang)): GBIF occurrence search API
Habitat climate climate answeredasked 2026-10-21
Daily extremes (NASA POWER) climate.extremes answeredasked 2026-10-21NASA POWER (MERRA-2) daily 1981–2024, cell 24.50_121.250, lapse-corrected -891 m at 6.5 °C/km
Wikidata wikidata failedasked 2026-10-21query.wikidata.org timeout (batched: Wikidata's query service, 200 GBIF keys)
Wikipedia wikipedia nothing to reportasked 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 nothing to reportasked 2026-10-21
Wikimedia Commons commons 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 5 datasets via GBIF.org; each carries its own licence.

Cultifolio

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