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Maesa lanyuensis; photograph 胡正恆(Jackson Hu), CC BY, iNaturalist via GBIF CC BY胡正恆(Jackson Hu), CC BY, iNaturalist via GBIF

Maesa lanyuensis Yuen P.Yang

Primulaceae · Taiwan

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Maesa lanyuensis, photograph 胡正恆(Jackson Hu), CC BY, iNaturalist via GBIFMaesa lanyuensis, photograph 胡正恆(Jackson Hu), CC BY, iNaturalist via GBIFMaesa lanyuensis, photograph 林正文, CC BY, iNaturalist via GBIF 4 photographs ›
Habitat figures
Coldest month, mean nightly low
19.9°C
Jan at the habitat, not a floor; extremes not used (sea cell) CHELSA
Warmest month, mean daily high
29°C
Jul at the habitat CHELSA
Rain a year (median across the range)
3,465mm
12 months of 25 mm or more in the median year CHELSA
Open-sky light
18–39DLI
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 November, read as a summer growing season. rain rule, CHELSA
Northern hemisphere unless you set your site. The chart is in the habitat's months.

Cultivation

Seasons

The rain rule reads a summer growing season: 70% of the median year's rain (2,479 mm of 3,453 mm) falls in May to November, warmer than the year (wet-season mean 26.6 °C against a yearly mean of 24.7 °C). Months are the habitat's, northern hemisphere; shifted six months for a southern-hemisphere collection: November to May.

Rain

3,453 mm in the median year at the habitat, 2,479 mm of it May to November. Wettest month September at 479 mm, driest month April at 151 mm. Across the grid cells of the range the year's total runs 2,475 mm to 4,084 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 3,465 mm, is the year's rain at the top of the page; the 3,453 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: 18 to 39 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 18, the highest 90th-percentile month 40).

Warmth and air
Temperature

Monthly means: the coldest month's mean nightly low 19.9 °C in January (across the grid cells of the range 19.8 °C to 20.4 °C), the warmest month's mean daily high 28.5 °C in July (median year across the grid cells of the range, CHELSA). Cold floor: none read. The nearest figure is 19.9 °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 that is mostly sea and are not used.

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. 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

Habitat months, northern hemisphere

Habitat climate of Maesa lanyuensis through the yearWarmest month July, mean daily high 29 °C; coldest month January, mean nightly low 19.9 °C; 3,453 mm of rain in the median year (the twelve monthly medians added). Medians across the range, from CHELSA. Habitat months, northern hemisphere.15°20°25°30°°C · day and nightcold quarter0100200300400500600mm rainDLI 18–39RH 60–68%JanFebMarAprMayJunJulAugSepOctNovDec
day night rain medians and 10th–90th percentile across 7 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 / 22–2222 / 22–2224 / 24–2425 / 25–2627 / 27–2728 / 28–2829 / 28–2928 / 28–2928 / 27–2826 / 26–2725 / 24–2522 / 22–23
Night °C20 / 20–2020 / 20–2122 / 22–2224 / 24–2426 / 25–2627 / 27–2727 / 27–2727 / 27–2726 / 26–2625 / 25–2523 / 23–2421 / 21–21
Rain mm247 / 110–303206 / 105–252154 / 83–188151 / 96–182295 / 174–346381 / 248–436320 / 308–367378 / 338–434479 / 456–558343 / 288–410283 / 163–344216 / 109–264
DLI19 / 19–2023 / 22–2430 / 28–3136 / 33–3737 / 34–3737 / 37–3839 / 39–4036 / 36–3632 / 32–3328 / 27–2922 / 21–2318 / 18–19
RH %60 / 59–6161 / 60–6262 / 62–6364 / 64–6565 / 65–6767 / 67–6967 / 66–6968 / 66–7066 / 65–6763 / 62–6462 / 61–6360 / 59–60

The daily extremes were read at a NASA POWER cell that is 4% land: neither it nor the next candidates whose coldest month's mean nightly low is within 2 °C of the median across cells sit in a POWER cell that is mostly land, and the rule reads a cold floor only from a cell that is mostly land, so none is read for this species. Nor is the coldest month's mean nightly low taken as one: it is a mean of a month's lows, not its coldest night. What that cell gave over 44 years: absolute minimum 13.9 °C, 1st-percentile night 17.3 °C, 99th-percentile day 29.4 °C.

How this section is made
Each figure is the median across the 7 grid cells holding the 35 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 1358:6030 (22.075, 121.525). 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 7 distinct grid cells holding 35 of the 35 in-range records; extremes and elevation at the typical cell 1358:6030 (its coldest month's mean nightly low nearest the median across cells, though its NASA POWER cell is only 4% land and none of the 6 next candidates within 2 °C of the median was mostly land); its position is the cell centre. Extremes: NASA POWER (MERRA-2) daily 1981–2024, cell 22.00_121.250, lapse-corrected +142 m at 6.5 °C/km. Elevation: ETOPO 2022, 183 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.
NativeTaiwan · 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 marker22.558, 121.519 · in the densest population, 46 records (98% of those in range)
Kew's description“subtropical” · quoted from WCVP, RBG Kew (CC BY 4.0); not derived here
Evidence usedThe map marker rests on all 47 georeferenced records inside the native range; the climate across the range on the 35 of them placed to within 10 km; the map shows only the 15 openly licensed ones, which alone would put the marker 24 km away. 12 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 47 in-range records; it decides nothing. Records outside the native range, living specimens and records marked introduced are not used; which records count.

Photographs

Maesa lanyuensis, photograph 1did not loadMaesa lanyuensis, photograph 2did not loadMaesa lanyuensis, photograph 3did not load

Photographs: 胡正恆(Jackson Hu), CC BY, iNaturalist via GBIF (2); 林正文, CC BY, iNaturalist via GBIF.

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

Mussaenda macrophylla Mussaenda macrophylla Rubiaceae Photo: CC BY, 胡正恆(Jackson Hu)Kalanchoe tashiroi Kalanchoe tashiroi Crassulaceae Photo: CC BY, 胡正恆(Jackson Hu) Clausena anisum-olens Rutaceae Murraya omphalocarpa Murraya omphalocarpa Rutaceae Photo: CC BY, Cheng-Te HsuGomphandra luzoniensis Gomphandra luzoniensis Stemonuraceae Photo: CC BY, Cheng-Te HsuAlpinia flabellata Alpinia flabellata Zingiberaceae Photo: CC BY, Weiting Liu

Other Maesa 8 in the reference

Maesa argentea Primulaceae Maesa hupehensis Primulaceae Maesa indica Maesa indica Primulaceae Photo: CC BY, Patricia RoseMaesa japonica Maesa japonica Japanese Maesa Photo: CC BY, 岸本年郎Maesa lanceolata Maesa lanceolata Primulaceae Photo: CC0, author not statedMaesa montana Maesa montana Primulaceae Photo: CC BY-SA, Franz XaverMaesa perlarius Maesa perlarius Primulaceae Photo: CC BY-SA, Shih-Shiuan Kao from Taipei, Taiwan Maesa permollis Primulaceae

Names & registers

GBIFPOWOIPNIWFOWikidata

The record

Family
Primulaceae
Described by
Yuen P.Yang
Native to
Taiwan
Wild records
47 in range · 15 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; 2 records within 1 km of a botanic garden, herbarium or zoo left out (2 at a zoo; Wikidata's list)
Habitat climate climate answeredasked 2026-10-22
Daily extremes (NASA POWER) climate.extremes answeredasked 2026-10-22NASA POWER (MERRA-2) daily 1981–2024, cell 22.00_121.250, lapse-corrected +142 m at 6.5 °C/km; read, and set aside: NASA POWER's cell is mostly sea (4% land), so no cold floor is shown
Wikidata wikidata answeredasked 2026-10-22
Wikipedia wikipedia nothing to reportasked 2026-10-22
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 2026-10-22
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 5 datasets via GBIF.org; each carries its own licence.

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