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Hylomecon japonica; photograph Hans Bernhard (Schnobby), CC BY-SA 3.0, via Wikimedia Commons CC BY-SAHans Bernhard (Schnobby), CC BY-SA 3.0, via Wikimedia Commons

Hylomecon japonica (Thunb.) Prantl

Papaveraceae · China South-Central, China North-Central +2

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

No habitat climate
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Hylomecon japonica, photograph KENPEI, CC BY-SA 3.0, via Wikimedia CommonsHylomecon japonica, photograph KENPEI, CC BY-SA 3.0, via Wikimedia CommonsHylomecon japonica, photograph Qwert1234, CC BY-SA 3.0, via Wikimedia CommonsHylomecon japonica, photograph C T Johansson, CC BY-SA 3.0, via Wikimedia CommonsHylomecon japonica, photograph C T Johansson, CC BY-SA 3.0, via Wikimedia CommonsHylomecon japonica, photograph C T Johansson, CC BY-SA 3.0, via Wikimedia Commons 12 photographs ›

Summary

Hylomecon japonica is a species of flowering plant in the family Papaveraceae, native to China and Japan. It was first described by Carl Peter Thunberg in 1784 as Chelidonium japonicum.

Quoted from Wikipedia, "Hylomecon japonica", CC BY-SA 4.0.

Cultivation

Nothing derived: no habitat climate for this species.

Climate across the habitat

No habitat climate can be derived: 13 in-range records, none placed to within 10 km. 13 of the 13 in-range records are placed to worse than 10 km, or to no stated accuracy and fewer than three decimals or by something other than a person's observation, and cannot place a climate cell, though they count for the map and its marker.

Natural habitat

Native range as published by WCVP; the marker is where the records are densest and decides nothing.
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 keys of the names Kew's World Checklist holds as this plant: 7314858 (Stylophorum japonicum (Thunb.) Miq., 0 records), 7315194 (Chelidonium japonicum Thunb., 14 records). No name was matched to GBIF; the keys are read from Kew's synonymy. How.

NativeChina South-Central, China North-Central, China Southeast, Japan · introduced: Vermont · 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 marker38.117, 140.767 · in the densest population, 8 records (62% 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 13 georeferenced records inside the native range; the map shows only the 9 openly licensed ones, which alone would put the marker in the same place. No climate across the range is derived for this species. 13 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 7314858 (Stylophorum japonicum (Thunb.) Miq.): Kew's file holds it as Stylophorum japonicum (Thunb.) Miq. (synonym under Hylomecon japonica (Thunb.) Prantl); 0 records, from GBIF's search API on the day of the build.Records also from GBIF's key 7315194 (Chelidonium japonicum Thunb.): Kew's file holds it as Chelidonium japonicum Thunb. (synonym under Hylomecon japonica (Thunb.) Prantl); 14 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 13 in-range records; it decides nothing. Records outside the native range, living specimens and records marked introduced are not used; which records count.

Photographs

Hylomecon japonica, photograph 1did not loadHylomecon japonica, photograph 2did not loadHylomecon japonica, photograph 3did not loadHylomecon japonica, photograph 4did not loadHylomecon japonica, photograph 5did not loadHylomecon japonica, photograph 6did not load

Photographs: KENPEI, CC BY-SA 3.0, via Wikimedia Commons (2); Qwert1234, CC BY-SA 3.0, via Wikimedia Commons; C T Johansson, CC BY-SA 3.0, via Wikimedia Commons (3).

Other Hylomecon 1 in the reference

Hylomecon vernalis Hylomecon vernalis Forest poppy Photo: CC BY, Фёдор

Names & registers

Also known as Stylophorum japonicum; Chelidonium japonicum. (WCVP, RBG Kew)

IPNIPOWOWikidataWFOWikipedia

The record

Family
Papaveraceae
Described by
(Thunb.) Prantl
Native to
China South-Central, China North-Central, China Southeast +1
Wild records
13 in range · 9 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 Hylomecon japonica (Thunb.) Prantl (plant_name_id 2856924), 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 answeredasked 2026-10-22this 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; 0 records of GBIF's key 7314858, Stylophorum japonicum (Thunb.) Miq. (Kew's file holds it as Stylophorum japonicum (Thunb.) Miq. (synonym under Hylomecon japonica (Thunb.) Prantl)): GBIF occurrence search API; 14 records of GBIF's key 7315194, Chelidonium japonicum Thunb. (Kew's file holds it as Chelidonium japonicum Thunb. (synonym under Hylomecon japonica (Thunb.) Prantl)): the GBIF download
Habitat climate climate nothing to reportasked 2026-10-2213 in-range records, none placed to within 10 km
Wikidata wikidata answeredasked 2026-10-22found by Kew's IPNI identifier 673222-1, POWO 673222-1
Wikipedia wikipedia answeredasked 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 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 5 datasets via GBIF.org; each carries its own licence.

Cultifolio

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