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Arisaema wattii Hook.f.

Araceae · China South-Central, Tibet +3

Photographs not checked iNaturalist was skipped (not asked) when this page was built. Not asked, or not answered, is not "none": nothing here claims there is none. Why the site says it this way.
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Habitat figuresfrom few records
Coldest month, mean nightly low
-3.7°C
Jan at the habitat, not a floor; extremes not used (the weather cell's ground is too far off) CHELSA
Warmest month, mean daily high
17°C
Jun, Jul and Aug at the habitat CHELSA
Rain a year (median across the range)
3,439mm
12 months of 25 mm or more in the median year CHELSA
Open-sky light
20–32DLI
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: 8 records in 6 grid cells. The records.

About the genus · Arisaema

Arisaema is a large and diverse genus of the flowering plant family Araceae. The largest concentration of species is in China and Japan, with other species native to other parts of southern Asia as well as eastern and central Africa, Mexico and eastern North America. Asiatic species are often called cobra lilies, while western species are often called jack-in-the-pulpit; both names refer to the distinctive appearance of the flower, which consists of an erect central spadix rising from a spathe.

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

Cultivation

Seasons

The rain rule reads a summer growing season: 70% of the median year's rain (2,438 mm of 3,442 mm) falls in May to September, warmer than the year (wet-season mean 14.0 °C against a yearly mean of 9.1 °C). Months are the habitat's, northern hemisphere; shifted six months for a southern-hemisphere collection: November to March.

Rain

3,442 mm in the median year at the habitat, 2,438 mm of it May to September. Wettest month June at 565 mm, driest month December at 48 mm. Across the grid cells of the range the year's total runs 2,026 mm to 4,210 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 3,439 mm, is the year's rain at the top of the page; the 3,442 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: 20 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 19, the highest 90th-percentile month 37).

Warmth and air
Temperature

Monthly means: the coldest month's mean nightly low -3.7 °C in January (across the grid cells of the range -11.4 °C to -1.2 °C), the warmest month's mean daily high 17.3 °C in August (median year across the grid cells of the range, CHELSA). Cold floor: none read. The nearest figure is -3.7 °C, the coldest month's mean nightly low, January, 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 whose ground is too far above or below the typical spot to correct for, and are not used.

Humidity

Relative humidity at the habitat: 63 to 75% 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.

Climate across the habitat

From few records: this habitat climate is read from 8 records in 6 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 Arisaema wattii through the yearWarmest months June, July and August, mean daily high 17 °C; coldest month January, mean nightly low -3.7 °C; 3,442 mm of rain in the median year (the twelve monthly medians added). Medians across the range, from CHELSA. Habitat months, northern hemisphere.-20°-10°0°10°20°30°frost°C · day and nightcold quarter0200400600800mm rainDLI 20–32RH 63–75%JanFebMarAprMayJunJulAugSepOctNovDec
day night rain medians and 10th–90th percentile across 6 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 °C6 / 1–107 / 1–1111 / 5–1413 / 8–1615 / 12–1817 / 15–1917 / 15–1917 / 15–1916 / 14–1814 / 11–1611 / 7–138 / 3–11
Night °C-4 / -11–-1-3 / -9–01 / -5–34 / -1–77 / 3–1011 / 8–1312 / 9–1412 / 9–1410 / 7–126 / 2–81 / -4–4-2 / -8–1
Rain mm57 / 36–76122 / 77–164157 / 143–197273 / 171–328434 / 188–525565 / 287–679537 / 374–622476 / 296–567426 / 216–534274 / 168–35673 / 50–9948 / 24–66
DLI23 / 21–2527 / 25–2832 / 29–3432 / 31–3732 / 30–3625 / 23–3220 / 19–2822 / 21–2823 / 23–2626 / 25–2824 / 23–2622 / 20–24
RH %64 / 60–6867 / 61–7067 / 62–6968 / 64–7068 / 68–7073 / 71–7675 / 72–7873 / 70–7571 / 70–7366 / 65–6663 / 60–6563 / 58–66

The daily extremes were not used: the correction for elevation, +1024 m, is beyond the 1,000 m either way that a lapse rate is applied over, so the weather cell's ground is other terrain than the typical spot's. So no cold floor is read for this species, and the coldest month's mean nightly low is not taken as one. What that cell gave, so corrected, over 44 years: absolute minimum -8.6 °C, 1st-percentile night -5.6 °C.

How this section is made
Each figure is the median across the 6 grid cells holding the 8 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 1283:5567 (25.825, 98.375). 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 6 distinct grid cells holding 8 of the 8 in-range records; extremes and elevation at the typical cell 1283:5567 (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 26.00_98.125, lapse-corrected +1024 m at 6.5 °C/km. Elevation: ETOPO 2022, 2583 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, Tibet, Assam, East Himalaya, Myanmar · 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 marker27.185, 98.72 · in the densest population, 47 records (69% of those in range)
Kew's description“tuberous geophyte” · “temperate” · quoted from WCVP, RBG Kew (CC BY 4.0); not derived here
Evidence usedThe map marker rests on all 68 georeferenced records inside the native range; the climate across the range on the 8 of them placed to within 10 km; the map shows only the 53 openly licensed ones, which alone would put the marker 1 km away. 1 record outside the WCVP native range not used. Under a dozen records behind the climate. 60 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 68 in-range records; it decides nothing. Records outside the native range, living specimens and records marked introduced are not used; which records count.

Photographs

Not checked. iNaturalist was skipped (not asked) when this page was built; GBIF's observation records with coordinates hold none. Not a statement that none exist.

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

Rhododendron lindleyi Rhododendron lindleyi Ericaceae Photo: CC BY, Markus LampinenRhododendron kendrickii Rhododendron kendrickii Ericaceae Photo: CC BY, sunoochiMaianthemum oleraceum Maianthemum oleraceum Asparagaceae Photo: CC BY, Siddarth MachadoRhododendron falconeri Rhododendron falconeri Ericaceae Photo: CC0, author not stated Polygonatum cathcartii Asparagaceae Rhododendron glaucophyllum Rhododendron glaucophyllum Ericaceae Photo: CC0, Daderot

Other Arisaema 52 in the reference

Arisaema amurense Arisaema amurense Amur jack-in-the-pulpit Photo: CC BY, Tatyana PetrenkoArisaema angustatum Arisaema angustatum Araceae Photo: CC BY, Alexander Wentworth Arisaema aridum Araceae Arisaema asperatum Araceae Arisaema auriculatum Araceae Arisaema bockii Arisaema bockii Araceae Photo: CC BY, Jiao Sun (孙娇)Arisaema candidissimum Arisaema candidissimum Araceae Photo: CC0, Peter coxheadArisaema ciliatum Arisaema ciliatum Araceae Photo: CC BY, Wang.QGArisaema concinnum Arisaema concinnum Araceae Photo: CC BY, Morten RossArisaema consanguineum Arisaema consanguineum Himalayan cobra lily Photo: CC BY, Cheng-Tao LinArisaema costatum Arisaema costatum Araceae Photo: CC BY, Sagnik Dutta RoyArisaema cucullatum Arisaema cucullatum Araceae Photo: CC BY-SA, Qwert1234 all 53 ›

Names & registers

Also known as Arisaema biauriculatum. (GBIF Backbone)

Under another author Arisaema auriculatum W.W.Sm. is an older name of this species, not Arisaema auriculatum, a species of the reference. (GBIF Backbone)

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
Araceae
Described by
Hook.f.
Native to
China South-Central, Tibet, Assam +2
Wild records
68 in range · 53 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
Habitat climate climate answeredasked 2026-10-21
Daily extremes (NASA POWER) climate.extremes answeredasked 2026-10-21NASA POWER (MERRA-2) daily 1981–2024, cell 26.00_98.125, lapse-corrected +1024 m at 6.5 °C/km; read, and set aside: the correction for elevation, +1024 m, is beyond the 1,000 m either way that a lapse rate is applied over, so the weather cell's ground is other terrain than the typical spot's, so no cold floor is shown
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 nothing to reportasked 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 15 datasets via GBIF.org; each carries its own licence.

Cultifolio

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