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Aster oldhamii; photograph 黃小麵, CC BY-SA 4.0, via Wikimedia Commons CC BY-SA黃小麵, CC BY-SA 4.0, via Wikimedia Commons

Aster oldhamii Hemsl.

Asteraceae · Taiwan

English names not checked: Wikidata's common names were not read for this page.

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Aster oldhamii, photograph 黃小麵, CC BY-SA 4.0, via Wikimedia Commons 2 photographs ›
Habitat figures
Coldest month, mean nightly low
15.1°C
Jan at the habitat, not a floor; extremes not used (sea cell) CHELSA
Warmest month, mean daily high
29°C
Jul and Aug at the habitat CHELSA
Rain a year (median across the range)
3,603mm
12 months of 25 mm or more in the median year CHELSA
Open-sky light
14–39DLI
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
Rain spread: 70% of the median year's rain takes 8 months, so no short rainy 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 no short rainy season: 70% of the median year's rain (2,731 mm of 3,612 mm) takes 8 months, February, May to June and August to December. Mean temperature moves 11.5 °C between the warmest and coldest month. Months are the habitat's, northern hemisphere; shifted six months for a southern-hemisphere collection: February to June, August and November to December.

Rain

3,612 mm in the median year at the habitat, 2,731 mm of it February, May to June and August to December. Wettest month September at 484 mm, driest month July at 189 mm. Across the grid cells of the range the year's total runs 3,326 mm to 4,537 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 3,603 mm, is the year's rain at the top of the page; the 3,612 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: 14 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 14, the highest 90th-percentile month 40).

Warmth and air
Temperature

Monthly means: the coldest month's mean nightly low 15.1 °C in January (across the grid cells of the range 14.2 °C to 15.5 °C), the warmest month's mean daily high 28.8 °C in July (median year across the grid cells of the range, CHELSA). Cold floor: none read. The nearest figure is 15.1 °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: 62 to 69% 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 Aster oldhamii through the yearWarmest months July and August, mean daily high 29 °C; coldest month January, mean nightly low 15.1 °C; 3,612 mm of rain in the median year (the twelve monthly medians added). Medians across the range, from CHELSA. Habitat months, northern hemisphere.10°15°20°25°30°35°°C · day and nightcold quarter0200400600800mm rainDLI 14–39RH 62–69%JanFebMarAprMayJunJulAugSepOctNovDec
day night rain medians and 10th–90th percentile across 14 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 °C18 / 17–1818 / 18–1920 / 19–2023 / 22–2325 / 25–2627 / 27–2829 / 28–3029 / 28–2927 / 27–2825 / 24–2522 / 21–2219 / 18–19
Night °C15 / 14–1615 / 15–1617 / 16–1720 / 19–2023 / 22–2325 / 25–2627 / 26–2726 / 26–2725 / 24–2523 / 22–2320 / 19–2017 / 16–17
Rain mm261 / 235–334320 / 279–334225 / 189–271206 / 178–221272 / 246–314293 / 254–321189 / 159–227267 / 244–302484 / 461–613432 / 390–716388 / 329–623275 / 242–388
DLI14 / 14–1617 / 16–1824 / 23–2429 / 28–2931 / 30–3234 / 34–3539 / 39–4036 / 36–3730 / 30–3123 / 23–2417 / 16–1814 / 14–15
RH %63 / 61–6665 / 63–6766 / 64–6868 / 67–7068 / 67–7069 / 67–7168 / 66–6968 / 66–6967 / 66–6964 / 63–6764 / 62–6662 / 60–65

The daily extremes were read at a NASA POWER cell that is 40% 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 4.9 °C, 1st-percentile night 10.6 °C, 99th-percentile day 31.1 °C.

How this section is made
Each figure is the median across the 14 grid cells on land that hold in-range records (61 records in those cells; 2 more cells hold records but no land by the elevation layer, so those records sit at sea and the cells are left out), 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 1309:6037 (24.525, 121.875). 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 14 distinct grid cells holding 61 of the 71 in-range records (2 further cells with records at sea, by the elevation layer, left out); extremes and elevation at the typical cell 1309:6037 (its coldest month's mean nightly low nearest the median across cells, though its NASA POWER cell is only 40% land and none of the 11 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 24.50_121.875, lapse-corrected -25 m at 6.5 °C/km. Elevation: ETOPO 2022, 229 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.

This species has no GBIF key of its own. Its records are GBIF's under the key of the name Kew's World Checklist holds as this plant: 6301938 (Heteropappus oldhamii (Hemsl.) Kitam., 218 records). No name was matched to GBIF; the keys are read from Kew's synonymy. How.

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 marker25.116, 121.891 · in the densest population, 94 records (99% of those in range)
Kew's description“temperate” · quoted from WCVP, RBG Kew (CC BY 4.0); not derived here
Evidence usedThe map marker rests on all 95 georeferenced records inside the native range; the climate across the range on the 61 of them in the land cells it reads, of 71 placed to within 10 km; the map shows only the 14 openly licensed ones, which alone would put the marker 3 km away. 14 records outside the WCVP native range not used. 24 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 6301938 (Heteropappus oldhamii (Hemsl.) Kitam.): Kew's file holds it as Heteropappus oldhamii (Hemsl.) Kitam. (synonym under Aster oldhamii Hemsl.); 218 records, from GBIF's download.
How this section is made
The map marker: the openly licensed record nearest the middle of the densest 1° population of the 95 in-range records; it decides nothing. Records outside the native range, living specimens and records marked introduced are not used; which records count.

Photographs

Aster oldhamii, photograph 1did not load

Photographs: 黃小麵, CC BY-SA 4.0, via Wikimedia Commons.

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

Eupatorium luchuense Eupatorium luchuense Asteraceae Photo: CC BY, teresa loHibiscus syriacus Hibiscus syriacus Syrian ketmia Photo: CC BY-SA, Douglas GoldmanSchenkia japonica Schenkia japonica Gentianaceae Photo: CC0, 葉子Gynura formosana Gynura formosana Asteraceae Photo: CC0, author not statedElaeagnus formosana Elaeagnus formosana Elaeagnaceae Photo: CC BY, 如此甚好Freycinetia formosana Freycinetia formosana Pandanaceae Photo: CC BY, Wang J.P.

Other Aster 25 in the reference

Aster ageratoides Aster ageratoides Rough-surface aster Photo: CC0, author not statedAster alpinus Aster alpinus Alpine aster Photo: CC BY, Matt BergerAster altaicus Aster altaicus Asteraceae Photo: CC BY, Nina FilippovaAster amellus Aster amellus European Michaelmas-daisy Photo: CC BY, Michael AndresekAster baccharoides Aster baccharoides Asteraceae Photo: CC0, author not statedAster bellidiastrum Aster bellidiastrum Asteraceae Photo: CC BY-SA, Opioła JerzyAster glehnii Aster glehnii Asteraceae Photo: CC BY-SA, Koichi OdaAster hispidus Aster hispidus Asteraceae Photo: CC BY-SA, Imartin6Aster iinumae Aster iinumae Asteraceae Photo: CC BY, mami_t_tAster incisus Aster incisus Asteraceae Photo: CC BY-SA, Kurt StüberAster koraiensis Aster koraiensis Korean aster Photo: CC BY, pavlaki1968Aster lautureanus Aster lautureanus Mountain aster Photo: CC BY, Elena_Sherehora all 26 ›

Names & registers

Also known as Heteropappus oldhamii; Heteropappus hispidus var. oldhamii. (WCVP, RBG Kew)

IPNIPOWOWikidataWFO

The record

Family
Asteraceae
Described by
Hemsl.
Native to
Taiwan
Wild records
95 in range · 14 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
Kew's names (WCVP) kew.names answeredas of 2026-06-04Kew's entry Aster oldhamii Hemsl. (plant_name_id 3099737), read from Kew's names file
GBIF species record gbif.species not askedGBIF's backbone holds no one accepted species of this name, and a name it holds only as another species' synonym is not taken for this one, so GBIF's records were not asked
GBIF synonyms gbif.synonyms not askedGBIF's backbone holds no one accepted species of this name, and a name it holds only as another species' synonym is not taken for this one, so GBIF's records were not asked
GBIF common names gbif.vernacular not askedGBIF's backbone holds no one accepted species of this name, and a name it holds only as another species' synonym is not taken for this one, so GBIF's records were not asked
WCVP native range wcvp.distribution answeredas of 2026-06-04
GBIF occurrence records gbif.occurrences answeredas of 2026-10-21this species has no GBIF key of its own; its records are read under GBIF's keys for the names Kew's file holds as this plant, never by a name matched; GBIF occurrence download https://doi.org/10.15468/dl.hbdw64, of 2026-10-21; 218 records of GBIF's key 6301938, Heteropappus oldhamii (Hemsl.) Kitam. (Kew's file holds it as Heteropappus oldhamii (Hemsl.) Kitam. (synonym under Aster oldhamii Hemsl.)): the GBIF download; 30 records within 1 km of a botanic garden, herbarium or zoo left out (30 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 24.50_121.875, lapse-corrected -25 m at 6.5 °C/km; read, and set aside: NASA POWER's cell is mostly sea (40% land), so no cold floor is shown
Wikidata wikidata answeredasked 2026-10-22found by Kew's IPNI identifier 181884-1, POWO 181884-1
Wikipedia wikipedia nothing to reportasked 2026-10-22
iNaturalist photographs, wild inat.photos.wild not asked
iNaturalist photographs, cultivated inat.photos.cultivated not asked
GBIF media gbif.media not askedGBIF's backbone holds no one accepted species of this name, and a name it holds only as another species' synonym is not taken for this one, so GBIF's records were not asked
Wikimedia Commons commons answeredasked 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 8 datasets via GBIF.org; each carries its own licence.

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