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Crinum amoenum; photograph (c) desertnaturalist, some rights reserved (CC BY) CC BY(c) desertnaturalist, some rights reserved (CC BY) · observed growing wild · 2018-04-15

Crinum amoenum Ker Gawl. ex Roxb.

Amaryllidaceae · Assam, Bangladesh +3 · listed by its family as a bulb, tuber or caudex

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Sow seed
Habitat figuresfrom few records
Coldest month, mean nightly low
11.4°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
31°C
Aug at the habitat CHELSA
Rain a year (median across the range)
2,720mm
10 months of 25 mm or more in the median year CHELSA
Open-sky light
22–32DLI
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: 3 records in 3 grid cells. The records.

About the genus · Crinum

Crinum is a genus of about 180 species of perennial plants that have large showy flowers on leafless stems, and develop from bulbs. They are found in seasonally moist areas, including marshes, swamps, depressions and along the sides of streams and lakes in tropical and subtropical areas worldwide.

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

Cultivation

Grouped as a bulb, tuber or caudex, listed under the family Amaryllidaceae in the archetype table, and Kew describes it as “bulbous geophyte”.

Seasons

The rain rule reads a summer growing season: 70% of the median year's rain (2,285 mm of 2,896 mm) falls in May to September, warmer than the year (wet-season mean 27.7 °C against a yearly mean of 23.9 °C). Months are the habitat's, northern hemisphere; shifted six months for a southern-hemisphere collection: November to March.

Rain

2,896 mm in the median year at the habitat, 2,285 mm of it May to September. Wettest month July at 570 mm, driest month December at 14 mm. Across the grid cells of the range the year's total runs 2,603 mm to 5,006 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 2,720 mm, is the year's rain at the top of the page; the 2,896 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: 22 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 17, the highest 90th-percentile month 32).

Warmth and air
Temperature

Monthly means: the coldest month's mean nightly low 11.4 °C in January (across the grid cells of the range 5.0 °C to 12.4 °C), the warmest month's mean daily high 30.5 °C in August (median year across the grid cells of the range, CHELSA). Cold floor: none read. The nearest figure is 11.4 °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: 56 to 67% 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 Amaryllidaceae in the archetype table, and Kew describes it as “bulbous geophyte”. 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 Crinum amoenum through the yearWarmest month August, mean daily high 31 °C; coldest month January, mean nightly low 11.4 °C; 2,896 mm of rain in the median year (the twelve monthly medians added). Medians across the range, from CHELSA. Habitat months, northern hemisphere.0°5°10°15°20°25°30°35°°C · day and nightcold quarter020040060080010001200mm rainDLI 22–32RH 56–67%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 °C22 / 16–2224 / 17–2428 / 20–2828 / 22–2929 / 24–3030 / 25–3130 / 26–3131 / 26–3130 / 25–3029 / 23–2926 / 20–2724 / 18–24
Night °C11 / 5–1213 / 7–1517 / 10–1819 / 13–2022 / 17–2324 / 20–2525 / 21–2525 / 21–2524 / 19–2420 / 15–2116 / 10–1713 / 6–14
Rain mm16 / 13–6843 / 34–13179 / 76–208277 / 241–319393 / 332–513542 / 463–907570 / 488–1088420 / 368–722360 / 326–693153 / 131–28829 / 15–6014 / 11–44
DLI23 / 17–2427 / 19–2732 / 23–3232 / 26–3231 / 28–3127 / 24–2825 / 22–2627 / 24–2726 / 21–2627 / 20–2825 / 19–2522 / 17–23
RH %60 / 57–6058 / 56–6256 / 54–6261 / 59–6363 / 63–646667 / 66–676666 / 65–6662 / 61–6359 / 57–6158 / 56–60

The daily extremes were not used: the correction for elevation, -1081 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 7.4 °C, 1st-percentile night 12.0 °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 1264:5424 (26.775, 91.225). 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 1264:5424 (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 27.00_91.250, lapse-corrected -1081 m at 6.5 °C/km. Elevation: ETOPO 2022, 96 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.
NativeAssam, Bangladesh, East Himalaya, Nepal, 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 marker26.75, 91.25 · in the densest population, 3 records (75% of those in range)
Kew's description“bulbous geophyte” · “wet tropical” · quoted from WCVP, RBG Kew (CC BY 4.0); not derived here
Evidence usedThe map marker rests on all 4 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 1 openly licensed one, which alone would put the marker 808 km away. 2 records outside the WCVP native range not used. Under a dozen records behind the map and the climate. 1 in-range record is placed to worse than 10 km, or with no stated accuracy (admitted only as a person's observation to three decimals), and stays on the map but off the climate.
How this section is made
The map marker: the centre of the tenth-degree cell nearest the middle (no openly licensed record lies in the population, so no record's coordinates are published) of the densest 1° population inside the densest 2° block of the 4 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.

Papilionanthe teres Papilionanthe teres Parrot Flower Photo: CC BY, Sandipan DasAlpinia nigra Alpinia nigra Black Fruited Galanga Photo: CC BY, Apichart SongsangchunDipterocarpus retusus Dipterocarpus retusus Hollong Photo: CC BY, T R Shankar RamanCurcuma zedoaria Curcuma zedoaria Zedoary Photo: CC BY, 呂一起(Lyu yi-chi)Dendrobium lituiflorum Dendrobium lituiflorum Orchidaceae Photo: CC BY, desertnaturalistDendrobium aphyllum Dendrobium aphyllum Orchidaceae Photo: CC BY, Sagnik Dutta Roy

Other Crinum 22 in the reference

Crinum × amabile Crinum × amabile Amaryllidaceae Photo: CC BY, Raúl A. Ruiz M.Crinum americanum Crinum americanum Seven sisters Photo: CC BY, Jody ShugartCrinum asiaticum Crinum asiaticum Poisonbulb Photo: CC BY, ian_mcallan Crinum balfourii Amaryllidaceae Crinum bulbispermum Crinum bulbispermum Hardy swamplily Photo: CC0, author not statedCrinum calamistratum Crinum calamistratum Amaryllidaceae Photo: CC0, DaderotCrinum campanulatum Crinum campanulatum Albany Swamplily Photo: CC BY, Henry de LangeCrinum erubescens Crinum erubescens Amaryllidaceae Photo: CC0, author not stated Crinum firmifolium Amaryllidaceae Crinum flaccidum Crinum flaccidum Darling Lily Photo: CC BY-SA, Ruth PalssonCrinum graminicola Crinum graminicola Grass Crinum Photo: CC0, author not statedCrinum jagus Crinum jagus Rattrayii Crinum Photo: CC BY, Doreen all 23 ›

Names & registers

Also known as Crinum amoenum var. verecundum; Crinum himalense; Crinum verecundum. (GBIF Backbone)

GBIFPOWOIPNIWFOWikidataiNaturalist

The record

Family
Amaryllidaceae
Described by
Ker Gawl. ex Roxb.
Native to
Assam, Bangladesh, East Himalaya +2
Wild records
4 in range · 1 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 27.00_91.250, lapse-corrected -1081 m at 6.5 °C/km; read, and set aside: the correction for elevation, -1081 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 answeredasked 2026-10-22
Wikipedia wikipedia nothing to reportasked 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 2026-10-22none of the photographs on this page is credited to GBIF: those shown are other sources', and GBIF's were the same photographs or were set aside by the photograph rules
Wikimedia Commons commons nothing to reportasked 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 2 datasets via GBIF.org; each carries its own licence.

Cultifolio

Opening your plants…