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Crocosmia masoniorum; photograph Dick Culbert from Gibsons, B.C., Canada, CC BY 2.0, via Wikimedia Commons CC BYDick Culbert from Gibsons, B.C., Canada, CC BY 2.0, via Wikimedia Commons

Crocosmia masoniorum (L.Bolus) N.E.Br.

Giant montbretia; Swan Crocosmia

Iridaceae · Cape Provinces · listed by its family as a bulb, tuber or caudex

No habitat climate
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Crocosmia masoniorum, photograph Dinesh Valke from Thane, India, CC BY-SA 2.0, via Wikimedia CommonsCrocosmia masoniorum, photograph Dinesh Valke from Thane, India, CC BY-SA 2.0, via Wikimedia CommonsCrocosmia masoniorum, photograph 阿橋 HQ, CC BY-SA 2.0, via Wikimedia CommonsCrocosmia masoniorum, photograph peganum from Henfield, England, CC BY-SA 2.0, via Wikimedia Commons 5 photographs ›

Summary

Crocosmia masoniorum, called the giant montbretia, is a species of flowering plant in the genus Crocosmia, native to the eastern Cape Provinces of South Africa. It has gained the Royal Horticultural Society's Award of Garden Merit.

Quoted from Wikipedia, "Crocosmia masoniorum", CC BY-SA 4.0.

About the genus · Crocosmia

Crocosmia, also known as montbretia, is a small genus of flowering plants in the iris family, Iridaceae. It is native to the grasslands of southern and eastern Africa, ranging from South Africa to Sudan. One species is endemic to Madagascar.

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

Cultivation

Grouped as a bulb, tuber or caudex, listed under the family Iridaceae in the archetype table, and Kew describes it as “tuberous geophyte”.

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 family Iridaceae in the archetype table, and Kew describes it as “tuberous geophyte”. 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. 4 of the 6 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.
NativeCape Provinces · introduced: Great Britain, Ireland · 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 marker-31.614, 27.982 · in the densest population, 6 records (100% of those in range)
Kew's description“tuberous geophyte” · “subtropical” · quoted from WCVP, RBG Kew (CC BY 4.0); not derived here
Evidence usedThe map marker rests on all 6 georeferenced records inside the native range, all openly licensed and shown on the map. 186 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. 4 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 6 in-range records; it decides nothing. Records outside the native range, living specimens and records marked introduced are not used; which records count.

Photographs

Crocosmia masoniorum, photograph 1did not loadCrocosmia masoniorum, photograph 2did not loadCrocosmia masoniorum, photograph 3did not loadCrocosmia masoniorum, photograph 4did not load

Photographs: Dinesh Valke from Thane, India, CC BY-SA 2.0, via Wikimedia Commons (2); 阿橋 HQ, CC BY-SA 2.0, via Wikimedia Commons; peganum from Henfield, England, CC BY-SA 2.0, via Wikimedia Commons.

Other Crocosmia 4 in the reference

Crocosmia aurea Crocosmia aurea Falling stars Photo: CC BY-SA, Dylan LeonardCrocosmia × crocosmiiflora Crocosmia × crocosmiiflora Montbretia Photo: CC BY, florawhiteCrocosmia paniculata Crocosmia paniculata Aunt-Eliza Photo: CC0, author not statedCrocosmia pottsii Crocosmia pottsii Pott's Montbretia Photo: CC0, author not stated

Names & registers

Also known as Tritonia masoniorum. (GBIF Backbone)

GBIFPOWOIPNIWFOWikidataWikipediaiNaturalist

The record

Family
Iridaceae
Described by
(L.Bolus) N.E.Br.
Native to
Cape Provinces
Wild records
6 in range · 6 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
GBIF species record gbif.species answeredasked 2026-10-22
GBIF synonyms gbif.synonyms answeredasked 2026-10-22
GBIF common names gbif.vernacular answeredasked 2026-10-22names fetched 2026-10-22
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; 20 records within 1 km of a botanic garden, herbarium or zoo left out (5 at a botanic garden or arboretum, 15 at a zoo; Wikidata's list)
Habitat climate climate nothing to reportasked 2026-10-22only 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 2026-10-22
Wikipedia wikipedia answeredasked 2026-10-22
iNaturalist photographs, wild inat.photos.wild nothing to reportasked 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 nothing to reportasked 2026-10-22
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 21 datasets via GBIF.org; each carries its own licence.

Cultifolio

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