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Begonia diadema; photograph yellowplant, CC BY, iNaturalist via GBIF CC BYyellowplant, CC BY, iNaturalist via GBIF

Begonia diadema W.Bull

Begoniaceae · Costa Rica · listed by its genus as a tropical foliage plant

Cited as Kew's World Checklist cites it, Begonia diadema W.Bull: GBIF's backbone key for this page carries the name with another author, Linden.

No habitat climate
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Begonia diadema, photograph Roland Godon, CC BY, iNaturalist via GBIFBegonia diadema, photograph Daderot, CC0, via Wikimedia CommonsBegonia diadema, photograph Begoniaceae.reddit, CC0, via Wikimedia CommonsBegonia diadema, photograph Kor!An (Корзун Андрей), CC BY-SA 3.0, via Wikimedia CommonsBegonia diadema, photograph Kor!An (Корзун Андрей), CC BY-SA 3.0, via Wikimedia CommonsBegonia diadema, photograph Kor!An (Корзун Андрей), CC BY-SA 3.0, via Wikimedia Commons 11 photographs ›

Summary

Begonia diadema is a species of flowering plant in the family Begoniaceae, native to Costa Rica. It has a rhizomatous growth habit with erect stems, pink flowers, and palmate leaves. In gardens, it prefers shade and blooms in the spring. For hybridizers, B. diadema is a common parent species in the rex cultorum.

Quoted from Wikipedia, "Begonia diadema", CC BY-SA 4.0.

About the genus · Begonia

Begonia is a genus of perennial flowering plants in the family Begoniaceae. The genus contains more than 2,000 different plant species, distributed primarily across tropical and subtropical regions of Africa, Asia, and Central and South America, with Africa considered the center of origin. Some species are commonly grown indoors as ornamental houseplants in cooler climates, or cultivated outside in summertime for their bright colorful flowers, which have petals but no sepals.

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

Cultivation

Grouped as a tropical foliage plant, listed under the genus Begonia in the archetype table, and Kew describes it as “subshrub or shrub”, “wet tropical”.

Nothing derived: no habitat climate for this species.
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.

Group. Listed under the genus Begonia in the archetype table, and Kew describes it as “subshrub or shrub”, “wet tropical”. A group is taken only where Kew's description of the species agrees with the table's listing. The table gives no figure and no prose; the cold floor is the habitat's alone.

Climate across the habitat

No habitat climate can be derived: Only 1 distinct land cell of the climate grid holds an in-range record placed to within 10 km; three are needed for an envelope. 1 of the 2 in-range records is 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 it counts for the map and its marker.

Natural habitat

Native range as published by WCVP.
No openly licensed record to show inside the range.
NativeCosta Rica · 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).
Kew's description“subshrub or shrub” · “wet tropical” · quoted from WCVP, RBG Kew (CC BY 4.0); not derived here
Evidence usedThe map marker rests on all 2 georeferenced records inside the native range; none carries a licence permitting republication, so the map shows no points. 25 records outside the WCVP native range not used. Under a dozen records behind the map. No climate across the range is derived for this species. 1 in-range record is placed to worse than 10 km, or with no stated accuracy (admitted only as a person's observation to three decimals), and stays on the map but off the climate.
Other GBIF keysRecords also from GBIF's key 12348816 (Begonia diadema W.Bull): Kew's file holds it as Begonia diadema W.Bull (accepted); 0 records, from GBIF's search API on the day of the build.

Photographs

Begonia diadema, photograph 1did not loadBegonia diadema, photograph 2did not loadBegonia diadema, photograph 3did not loadBegonia diadema, photograph 4did not loadBegonia diadema, photograph 5did not loadBegonia diadema, photograph 6did not load

Photographs: Roland Godon, CC BY, iNaturalist via GBIF; Daderot, CC0, via Wikimedia Commons; Begoniaceae.reddit, CC0, via Wikimedia Commons; Kor!An (Корзун Андрей), CC BY-SA 3.0, via Wikimedia Commons (3).

Other Begonia 279 in the reference

Begonia abdullahpieei Begoniaceae Begonia acerifolia Begonia acerifolia Maple-leaved begonia Photo: CC BY, Yuri SofronovBegonia acetosa Begonia acetosa Ruby begonia Photo: CC0, Daderot Begonia acetosella Begoniaceae Begonia acida Begonia acida Begoniaceae Photo: CC BY-SA, Michael WolfBegonia aconitifolia Begonia aconitifolia Aconite Leaved Begonia Photo: CC BY-SA, rubens curveloBegonia acutifolia Begonia acutifolia Begoniaceae Photo: CC BY, Cliff from I now live in Arlington, VA… Begonia albomaculata Begoniaceae Begonia × albopicta Begoniaceae Begonia alice-clarkiae Begoniaceae Begonia almedana Begoniaceae Begonia amphioxus Begoniaceae all 280 ›

Names & registers

GBIFPOWOIPNIWFOWikidataWikipedia

The record

Family
Begoniaceae
Described by
W.Bull
Native to
Costa Rica
Wild records
2 in range · 0 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 2026-10-21GBIF's key 4157626 is Begonia diadema Linden; Kew accepts Begonia diadema W.Bull, and the name is cited as Kew accepts it; its synonyms and common names are read from GBIF's Begonia diadema W.Bull (12348816) too
GBIF synonyms gbif.synonyms answeredasked 2026-10-210 read from GBIF's Begonia diadema W.Bull (12348816)
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 answeredasked 2026-10-21GBIF occurrence download https://doi.org/10.15468/dl.hbdw64, of 2026-10-21; 0 records of GBIF's key 12348816, Begonia diadema W.Bull (Kew's file holds it as Begonia diadema W.Bull (accepted)): GBIF occurrence search API
Habitat climate climate nothing to reportasked 2026-10-21only 1 distinct land cell of the climate grid holds an in-range record placed to within 10 km; three are needed for an envelope
Wikidata wikidata answeredasked 2026-10-21IPNI and POWO linked by Kew's number for Begonia diadema W.Bull (the item's: IPNI 104542-1, POWO 77236969-1)
Wikipedia wikipedia answeredasked 2026-10-21
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 2026-10-21
Wikimedia Commons commons answeredasked 2026-10-21
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 6 datasets via GBIF.org; each carries its own licence.

Cultifolio

Opening your plants…