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Casearia yucatanensis; photograph (c) Abraham A. Gómez Landero, some rights reserved (CC BY) CC BY(c) Abraham A. Gómez Landero, some rights reserved (CC BY) · observed growing wild · 2026-03-16

Casearia yucatanensis (Standl.) T.Samar. & M.H.Alford

Salicaceae · Mexico Southeast

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Casearia yucatanensis, photograph (c) Jalil R., some rights reserved (CC BY-SA)Casearia yucatanensis, photograph (c) Jalil R., some rights reserved (CC BY-SA)Casearia yucatanensis, photograph (c) Jalil R., some rights reserved (CC BY-SA)Casearia yucatanensis, photograph (c) Jalil R., some rights reserved (CC BY-SA)Casearia yucatanensis, photograph (c) Jalil R., some rights reserved (CC BY-SA)Casearia yucatanensis, photograph (c) Abraham A. Gómez Landero, some rights reserved (CC BY) 43 photographs ›
Habitat figures
Cold floor (1 night in 100)
16.6°C
Record low 13.3 °C in 44 years, at a typical spot in the range NASA POWER
Warmest month, mean daily high
35°C
May at the habitat CHELSA
Rain a year (median across the range)
1,170mm
12 months of 25 mm or more in the median year CHELSA
Open-sky light
24–41DLI
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 June to October, 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

Casearia yucatanensis, with no commonly used English name, is a species of flowering plant belonging to the family Salicaceae.

Quoted from Wikipedia, "Casearia yucatanensis", CC BY-SA 4.0.

Cultivation

Seasons

The rain rule reads a summer growing season: 70% of the median year's rain (818 mm of 1,140 mm) falls in June to October, warmer than the year (wet-season mean 27.5 °C against a yearly mean of 26.3 °C). Months are the habitat's, northern hemisphere; shifted six months for a southern-hemisphere collection: December to April.

Rain

1,140 mm in the median year at the habitat, 818 mm of it June to October. Wettest month September at 206 mm, driest month March at 30 mm. Across the grid cells of the range the year's total runs 973 mm to 1,391 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 1,170 mm, is the year's rain at the top of the page; the 1,140 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 41 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 23, the highest 90th-percentile month 44).

Warmth and air
Temperature

Coldest: the 1st-percentile night over 44 years at a typical spot in the range is 16.6 °C, the absolute minimum 13.3 °C, no frost in 44 years (NASA POWER daily minima). Warmest: the 99th-percentile day is 36.8 °C. Monthly means: the coldest month's mean nightly low 19.0 °C in January (across the grid cells of the range 18.7 °C to 21.7 °C), the warmest month's mean daily high 34.8 °C in May (median year across the grid cells of the range, CHELSA). Cold floor: 16.6 °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 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. NASA POWER daily minima and maxima over 44 years at a typical spot in the range, with a lapse correction of 0 m or none (the two are recorded alike); 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, northern hemisphere

Habitat climate of Casearia yucatanensis through the yearWarmest month May, mean daily high 35 °C; coldest month January, mean nightly low 19.0 °C; 1,140 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°15°20°25°30°35°40°36.8° 99th-percentile day, NASA POWER13.3° lowest night in 44 years, NASA POWER°C · day and nightcold quarter050100150200250mm rainDLI 24–41RH 55–64%JanFebMarAprMayJunJulAugSepOctNovDec
day night rain medians and 10th–90th percentile across 137 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 °C28 / 26–2930 / 26–3132 / 27–3334 / 28–3535 / 29–3633 / 29–3433 / 30–3433 / 30–3432 / 29–3330 / 28–3129 / 27–3028 / 26–29
Night °C19 / 19–2220 / 19–2221 / 20–2323 / 22–2424 / 23–2524 / 24–2624 / 24–2624 / 24–2624 / 23–2522 / 22–2521 / 21–2320 / 19–22
Rain mm34 / 29–6931 / 25–4830 / 20–5539 / 24–5092 / 63–111164 / 145–186153 / 117–175165 / 142–192206 / 162–229130 / 99–19154 / 44–10542 / 35–69
DLI26 / 25–2731 / 30–3236 / 35–3841 / 40–4340 / 39–4437 / 36–4039 / 38–4238 / 37–4134 / 33–3630 / 29–3227 / 26–2824 / 23–25
RH %59 / 58–6157 / 56–6056 / 54–6055 / 54–6157 / 55–6361 / 60–6561 / 60–6462 / 60–6564 / 63–6663 / 62–6560 / 59–6360 / 59–62
How this section is made
Each figure is the median across the 137 grid cells holding the 186 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 1371:1835 (21.425, -88.225). Over 44 years there: absolute minimum 13.3 °C, 1st-percentile night 16.6 °C, 99th-percentile day 36.8 °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 137 distinct grid cells holding 186 of the 186 in-range records; extremes and elevation at the typical cell 1371:1835 (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 21.50_-88.125, lapse-corrected 0 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.
NativeMexico Southeast · 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 marker20.773, -89.464 · in the densest population, 146 records (69% of those in range)
Kew's description“tree” · “wet tropical” · quoted from WCVP, RBG Kew (CC BY 4.0); not derived here
Evidence usedThe map marker rests on all 211 georeferenced records inside the native range; the climate across the range on the 186 of them placed to within 10 km; the map shows only the 163 openly licensed ones, which alone would put the marker 50 km away. 4 records outside the WCVP native range not used. 25 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 211 in-range records; it decides nothing. Records outside the native range, living specimens and records marked introduced are not used; which records count.

Photographs

Casearia yucatanensis, photograph 1did not loadCasearia yucatanensis, photograph 2did not loadCasearia yucatanensis, photograph 3did not loadCasearia yucatanensis, photograph 4did not loadCasearia yucatanensis, photograph 5did not loadCasearia yucatanensis, photograph 6did not load

Photographs: (c) Jalil R., some rights reserved (CC BY-SA) (5); (c) Abraham A. Gómez Landero, some rights reserved (CC BY).

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

Havardia albicans Havardia albicans Huisache Photo: CC BY, Isaac ChacónTrichocentrum andrewsiae Trichocentrum andrewsiae Orchidaceae Photo: CC BY, Trevor HardingFridericia floribunda Fridericia floribunda Bignoniaceae Photo: CC BY, Juan Cruzado CortésBunchosia swartziana Bunchosia swartziana Malpighiaceae Photo: CC BY-SA, Jalil R.Jatropha gaumeri Jatropha gaumeri Euphorbiaceae Photo: CC BY, Oscar Orlando Vazquez PiñaParmentiera millspaughiana Parmentiera millspaughiana Bignoniaceae Photo: CC BY, Alexis López Hernández

Other Casearia 9 in the reference

Casearia corymbosa Casearia corymbosa Salicaceae Photo: CC BY, Alexis López HernándezCasearia decandra Casearia decandra Wild honeytree Photo: CC BY, Patrícia MeesCasearia dodecandra Casearia dodecandra Guayabilla Photo: CC0, Yolanda M. LeonCasearia glomerata Casearia glomerata Salicaceae Photo: CC0, author not statedCasearia guianensis Casearia guianensis Guyanese wild coffee Photo: CC BY, ritireneCasearia laetioides Casearia laetioides Salicaceae Photo: CC BY, Dayron BretoCasearia membranacea Casearia membranacea Salicaceae Photo: CC BY, lansanCasearia sylvestris Casearia sylvestris Crackopen Photo: CC BY-SA, LorellaCasearia tachirensis Casearia tachirensis Salicaceae Photo: CC BY-SA, ciroalfonsosoto20

Names & registers

Also known as Samyda yucatanensis. (GBIF Backbone)

GBIFPOWOIPNIWikidataWikipediaiNaturalist

The record

Family
Salicaceae
Described by
(Standl.) T.Samar. & M.H.Alford
Native to
Mexico Southeast
Wild records
211 in range · 163 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; 12 records within 1 km of a botanic garden, herbarium or zoo left out (12 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 21.50_-88.125, lapse-corrected 0 m at 6.5 °C/km
Wikidata wikidata answeredasked 2026-10-21
Wikipedia wikipedia answeredasked 2026-10-21
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 2026-10-21none 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
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 18 datasets via GBIF.org; each carries its own licence.

Cultifolio

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