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Achyranthes sandwicensis (A.Gray) Di Vincenzo, Berends., Wondafr. & Borsch

Amaranthaceae · Hawaii

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

Photographs not checked iNaturalist and GBIF media were 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 figures
Cold floor (1 night in 100)
18.5°C
Record low 16.9 °C in 44 years, at a typical spot in the range NASA POWER
Warmest month, mean daily high
25°C
Jul, Aug, Sep and Oct at the habitat CHELSA
Rain a year (median across the range)
844mm
12 months of 25 mm or more in the median year CHELSA
Open-sky light
27–47DLI
Lowest to highest month (DLI) CHELSA
The year in the habitat's months, not shifted
  1. Jan
  2. Feb
  3. Mar
  4. Apr
  5. May
  6. Jun
  7. Jul
  8. Aug
  9. Sep
  10. Oct
  11. Nov
  12. Dec
A sharp rainy season, October to March (the habitat's months, not shifted), in a year of even temperature. rain rule, CHELSA
Not shifted: the shift rule does not apply to this habitat. The chart is in the habitat's months.

Cultivation

Seasons

The rain rule reads a sharp season: 70% of the median year's rain (653 mm of 892 mm) falls in October to March. The temperature curve is flat, 2.9 °C between the warmest and coldest month, so the growing-season rule does not infer a growing season from it. Months are the habitat's, northern hemisphere. The temperature curve moves under 4 °C between the warmest and coldest month, where the shift rule does not apply, so they are not shifted for a collection elsewhere.

Rain

892 mm in the median year at the habitat, 653 mm of it October to March. Wettest month December at 138 mm, driest month June at 26 mm. Across the grid cells of the range the year's total runs 692 mm to 1,132 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 844 mm, is the year's rain at the top of the page; the 892 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: 27 to 47 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 24, the highest 90th-percentile month 48).

Warmth and air
Temperature

Coldest: the 1st-percentile night over 44 years at a typical spot in the range is 18.5 °C, the absolute minimum 16.9 °C, no frost in 44 years (NASA POWER daily minima). Warmest: the 99th-percentile day is 27.8 °C. Monthly means: the coldest month's mean nightly low 20.2 °C in February (across the grid cells of the range 17.0 °C to 21.3 °C), the warmest month's mean daily high 25.1 °C in September (median year across the grid cells of the range, CHELSA). Cold floor: 18.5 °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: 63 to 65% 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, lapse-corrected +215 m to its elevation; 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 Achyranthes sandwicensis through the yearWarmest months July, August, September and October, mean daily high 25 °C; coldest month February, mean nightly low 20.2 °C; 892 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.15°20°25°30°27.8° 99th-percentile day, NASA POWER16.9° lowest night in 44 years, NASA POWER°C · day and nightcold quarter050100150200mm rainDLI 27–47RH 63–65%JanFebMarAprMayJunJulAugSepOctNovDec
day night rain medians and 10th–90th percentile across 18 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 °C23 / 21–2422 / 20–2322 / 21–2423 / 21–2423 / 22–2524 / 23–2625 / 23–2625 / 24–2725 / 24–2725 / 24–2624 / 23–2623 / 21–24
Night °C21 / 18–2220 / 17–2120 / 17–2121 / 17–2221 / 18–2222 / 19–2323 / 20–2423 / 20–2423 / 20–2423 / 20–2422 / 19–2321 / 18–22
Rain mm132 / 106–16189 / 64–118120 / 81–15259 / 43–8742 / 33–5626 / 15–3736 / 19–5238 / 21–4638 / 23–5767 / 56–89107 / 87–134138 / 110–170
DLI28 / 26–3133 / 31–3638 / 36–4043 / 40–4546 / 42–4747 / 42–4846 / 42–4745 / 41–4641 / 39–4336 / 34–3829 / 27–3227 / 24–30
RH %64 / 60–6663 / 59–6564 / 60–6664 / 60–6764 / 60–6764 / 60–6765 / 61–6764 / 61–6764 / 60–6864 / 60–6765 / 60–6764 / 60–66
How this section is made
Each figure is the median across the 18 grid cells holding the 19 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 1377:456 (21.125, -157.175). Over 44 years there: absolute minimum 16.9 °C, 1st-percentile night 18.5 °C, 99th-percentile day 27.8 °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 18 distinct grid cells holding 19 of the 19 in-range records; extremes and elevation at the typical cell 1377:456 (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 21.00_-156.875, lapse-corrected +215 m at 6.5 °C/km. Elevation: ETOPO 2022, 292 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: 3084975 (Nototrichium sandwicense (A.Gray) Hillebr., 109 records). No name was matched to GBIF; the keys are read from Kew's synonymy. How.

NativeHawaii · 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 marker20.878, -156.623 · in the densest population, 51 records (72% 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 71 georeferenced records inside the native range; the climate across the range on the 19 of them placed to within 10 km; the map shows only the 26 openly licensed ones, which alone would put the marker 104 km away. 52 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 3084975 (Nototrichium sandwicense (A.Gray) Hillebr.): Kew's file holds it as Nototrichium sandwicense (A.Gray) Hillebr. (synonym under Achyranthes sandwicensis (A.Gray) Di Vincenzo, Berends., Wondafr. & Borsch); 109 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 71 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 and GBIF media were skipped (not asked) when this page was built. 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.

Schiedea globosa Schiedea globosa Globe schiedea Photo: CC0, author not statedPolyscias hawaiensis Polyscias hawaiensis Hawai'i 'ohe Photo: Public domain, DaderotErythrina sandwicensis Erythrina sandwicensis Hawaiian Coral Tree Photo: CC0, author not statedPolyscias sandwicensis Polyscias sandwicensis Hawaiian reynoldsia Photo: CC BY, Neal KelsoDiospyros sandwicensis Diospyros sandwicensis Lama Photo: CC BY, Brynn FrickeEragrostis variabilis Eragrostis variabilis Poaceae Photo: CC BY, Kevin Faccenda

Other Achyranthes 3 in the reference

Achyranthes aspera Achyranthes aspera Devil's horsewhip Photo: CC BY, 胡正恆(Jackson Hu)Achyranthes bidentata Achyranthes bidentata Ox Knee Photo: CC BY, Emily SummerbellAchyranthes splendens Achyranthes splendens Maui chaff flower Photo: CC0, author not stated

Names & registers

Also known as Nototrichium viride var. kalaupapae; Ptilotus sandwicensis; Psilotrichum sandwicherse; Nototrichium fulvum; Psilotrichum viride and 3 more. (WCVP, RBG Kew)

IPNIPOWO

The record

Family
Amaranthaceae
Described by
(A.Gray) Di Vincenzo, Berends., Wondafr. & Borsch
Native to
Hawaii
Wild records
71 in range · 26 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 Achyranthes sandwicensis (A.Gray) Di Vincenzo, Berends., Wondafr. & Borsch (plant_name_id 3315941), 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; 109 records of GBIF's key 3084975, Nototrichium sandwicense (A.Gray) Hillebr. (Kew's file holds it as Nototrichium sandwicense (A.Gray) Hillebr. (synonym under Achyranthes sandwicensis (A.Gray) Di Vincenzo, Berends., Wondafr. & Borsch)): the GBIF download; 3 records within 1 km of a botanic garden, herbarium or zoo left out (3 at a botanic garden or arboretum; 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 21.00_-156.875, lapse-corrected +215 m at 6.5 °C/km
Wikidata wikidata nothing to reportasked 2026-10-22no item carries Kew's IPNI identifier 77353270-1, POWO 77353270-1
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 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 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 14 datasets via GBIF.org; each carries its own licence.

Cultifolio

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