Example ⟳ +
An example collection, so you can see what this page does. Nothing added here is kept: leaving deletes it.
Angelica keiskei; photograph (c) Marco Mussita, some rights reserved (CC BY) CC BY(c) Marco Mussita, some rights reserved (CC BY) · observed growing wild · 2023-11-08

Angelica keiskei (Miq.) Koidz.

Apiaceae · Japan

Add one to my plants
Sow seed
Angelica keiskei, photograph (c) 岸本年郎, some rights reserved (CC BY)Angelica keiskei, photograph (c) 岸本年郎, some rights reserved (CC BY)Angelica keiskei, photograph (c) Marco Mussita, some rights reserved (CC BY)Angelica keiskei, photograph (c) Marco Mussita, some rights reserved (CC BY)Angelica keiskei, photograph (c) 岸本年郎, some rights reserved (CC BY)Angelica keiskei, photograph (c) 岸本年郎, some rights reserved (CC BY) 23 photographs ›
Habitat figures
Coldest month, mean nightly low
6.5°C
Jan at the habitat, not a floor; extremes not used (sea cell) CHELSA
Warmest month, mean daily high
27°C
Aug at the habitat CHELSA
Rain a year (median across the range)
2,693mm
12 months of 25 mm or more in the median year CHELSA
Open-sky light
16–36DLI
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 March and May 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

Angelica keiskei, commonly known under the Japanese name of ashitaba (アシタバ or 明日葉), literally "tomorrow's leaf", is a species of flowering plant in the carrot family. It is native to Japan, where it is found on the Pacific Coast. It is native to the area of the Bōsō Peninsula, Miura Peninsula, Izu Peninsula, and the Izu Islands. It has been widely cultivated outside its natural range.

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

Cultivation

Seasons

The rain rule reads a summer growing season: 70% of the median year's rain (1,907 mm of 2,684 mm) falls in March and May to October, warmer than the year (wet-season mean 20.6 °C against a yearly mean of 16.9 °C). Months are the habitat's, northern hemisphere; shifted six months for a southern-hemisphere collection: November to April and September.

Rain

2,684 mm in the median year at the habitat, 1,907 mm of it March and May to October. Wettest month June at 326 mm, driest month December at 99 mm. Across the grid cells of the range the year's total runs 1,830 mm to 3,656 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 2,693 mm, is the year's rain at the top of the page; the 2,684 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: 16 to 36 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 15, the highest 90th-percentile month 37).

Warmth and air
Temperature

Monthly means: the coldest month's mean nightly low 6.5 °C in January (across the grid cells of the range 3.0 °C to 10.5 °C), the warmest month's mean daily high 27.1 °C in August (median year across the grid cells of the range, CHELSA). Cold floor: none read. The nearest figure is 6.5 °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: 53 to 70% 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 Angelica keiskei through the yearWarmest month August, mean daily high 27 °C; coldest month January, mean nightly low 6.5 °C; 2,684 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°°C · day and nightcold quarter0100200300400500mm rainDLI 16–36RH 53–70%JanFebMarAprMayJunJulAugSepOctNovDec
day night rain medians and 10th–90th percentile across 19 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 °C10 / 9–1310 / 9–1313 / 11–1517 / 16–1820 / 19–2122 / 22–2425 / 24–2727 / 26–2825 / 24–2621 / 20–2317 / 16–2013 / 11–16
Night °C7 / 3–117 / 3–109 / 5–1213 / 10–1617 / 14–1920 / 18–2223 / 22–2525 / 23–2622 / 21–2519 / 16–2114 / 11–179 / 6–13
Rain mm123 / 67–205140 / 79–220239 / 155–350227 / 157–280242 / 163–296326 / 225–431244 / 194–282228 / 168–272323 / 235–407305 / 192–487188 / 115–28699 / 57–196
DLI17 / 16–1922 / 21–2326 / 25–2833 / 31–3335 / 33–3532 / 30–3335 / 33–3736 / 33–3728 / 26–2921 / 20–2217 / 16–1816 / 15–17
RH %53 / 52–5754 / 53–5856 / 55–6059 / 58–6263 / 62–6467 / 67–6970 / 68–7268 / 66–7064 / 63–6859 / 58–6457 / 55–6154 / 53–58

The daily extremes were read at a NASA POWER cell that is 44% 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 -2.5 °C, 1st-percentile night 2.6 °C, 99th-percentile day 31.4 °C.

How this section is made
Each figure is the median across the 19 grid cells on land that hold in-range records (22 records in those cells; 1 more cell holds records but no land by the elevation layer, so those records sit at sea and the cell is 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 1130:6316 (33.475, 135.825). 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 19 distinct grid cells holding 22 of the 24 in-range records (1 further cell with records at sea, by the elevation layer, left out); extremes and elevation at the typical cell 1130:6316 (its coldest month's mean nightly low nearest the median across cells, though its NASA POWER cell is only 44% land and none of the 8 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 33.50_135.625, lapse-corrected -82 m at 6.5 °C/km. Elevation: ETOPO 2022, 30 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.
NativeJapan · 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 marker35.194, 139.6 · in the densest population, 137 records (90% of those in range)
Kew's description“perennial” · “temperate” · quoted from WCVP, RBG Kew (CC BY 4.0); not derived here
Evidence usedThe map marker rests on all 153 georeferenced records inside the native range; the climate across the range on the 22 of them in the land cells it reads, of 24 placed to within 10 km; the map shows only the 142 openly licensed ones, which alone would put the marker 2 km away. 5 records outside the WCVP native range not used. 129 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 153 in-range records; it decides nothing. Records outside the native range, living specimens and records marked introduced are not used; which records count.

Photographs

Angelica keiskei, photograph 1did not loadAngelica keiskei, photograph 2did not loadAngelica keiskei, photograph 3did not loadAngelica keiskei, photograph 4did not loadAngelica keiskei, photograph 5did not loadAngelica keiskei, photograph 6did not load

Photographs: (c) 岸本年郎, some rights reserved (CC BY) (4); (c) Marco Mussita, some rights reserved (CC BY) (2).

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

Carex oshimensis Carex oshimensis Evergold Sedge Photo: CC BY, 岸本年郎Ajania pacifica Ajania pacifica Gold and Silver Chrysanthemum Photo: CC0, author not statedDaphniphyllum teijsmannii Daphniphyllum teijsmannii Daphniphyllaceae Photo: CC BY, Saryu Mae 前 朝琉Boehmeria holosericea Boehmeria holosericea Seashore falsenettle Photo: CC BY, pavlaki1968Allium virgunculae Allium virgunculae Amaryllidaceae Photo: CC0, Mason BrockPhalaenopsis japonica Phalaenopsis japonica Nadopungran (East Asian aerides) Photo: CC BY-SA, Dalton Holland Baptista

Other Angelica 33 in the reference

Angelica acutiloba Angelica acutiloba Acutelobed Angelica Photo: Public domain, Pieria (Uploader and Photographer)Angelica ampla Angelica ampla Giant angelica Photo: CC BY, Frédérique Angelica anomala Eumenol angelica Angelica archangelica Angelica archangelica Garden angelica Photo: CC BY, Cyndy Sims (Parr)Angelica arguta Angelica arguta Sharp-toothed angelica Photo: CC BY, machaut2Angelica atropurpurea Angelica atropurpurea Great angelica Photo: CC BY, Tom ScavoAngelica breweri Angelica breweri Brewer's angelica Photo: CC0, author not statedAngelica californica Angelica californica California angelica Photo: CC0, author not statedAngelica capitellata Angelica capitellata Button parsley Photo: CC BY, Dee Shea HimesAngelica cincta Angelica cincta Amur angelica Photo: CC BY, Tatyana PetrenkoAngelica dahurica Angelica dahurica Dahurian angelica Photo: CC BY, Urgamal MagsarAngelica decurrens Angelica decurrens Apiaceae Photo: CC BY, Oleg Kosterin all 34 ›

Names & registers

Also known as Angelica keiskei f. foliosa; Angelica utilis; Archangelica keiskei. (GBIF Backbone)

GBIFPOWOIPNIWFOWikidataWikipediaiNaturalist

The record

Family
Apiaceae
Described by
(Miq.) Koidz.
Native to
Japan
Wild records
153 in range · 142 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; 7 records within 1 km of a botanic garden, herbarium or zoo left out (5 at a botanic garden or arboretum, 2 at a zoo; 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 33.50_135.625, lapse-corrected -82 m at 6.5 °C/km; read, and set aside: NASA POWER's cell is mostly sea (44% land), so no cold floor is shown
Wikidata wikidata answeredasked 2026-10-21
Wikipedia wikipedia answeredasked 2026-10-21Wikipedia's article Ashitaba, the English article of this species' Wikidata item (Q4805168)
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 22 datasets via GBIF.org; each carries its own licence.

Cultifolio

Opening your plants…