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Trimezia fosteriana; photograph Marcos Queiroz, CC0, via Wikimedia Commons CC0Marcos Queiroz, CC0, via Wikimedia Commons

Trimezia fosteriana Steyerm.

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

No habitat climate
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Trimezia fosteriana, photograph SATELIT BM, CC BY-SA 4.0, via Wikimedia Commons 2 photographs ›

Summary

Trimezia fosteriana is a species of bulbous plant in the family Iridaceae. Due to the attractive aspect of its leaves and exuberant and delicate yellow flowers, it is widely used in cities in South America for ornamental purposes and gardening. This species is easily confused with Trimezia longifolia, due to the similarity of its yellow flowers. However, the latter species, placed in the genus Neomarica by some sources, is distinguished by the presence of a flattened (leaf-like) flower stem.

Quoted from Wikipedia, "Trimezia fosteriana", CC BY-SA 4.0.

About the genus · Trimezia

Trimezia is a genus of flowering plants in the family Iridaceae, native to the warmer parts of southern Mexico, Central America, South America, Florida, and the West Indies. Trimezia is placed in the tribe Trimezieae. The division of the tribe into genera has varied considerably. More on Wikipedia ›

Quoted from Wikipedia, "Trimezia", 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 “rhizomatous 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 “rhizomatous 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: 6 in-range records, none placed to within 10 km. 6 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.
NativeVenezuela · 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 marker5.61, -61.4 · in the densest population, 6 records (100% of those in range)
Kew's description“rhizomatous geophyte” · “wet tropical” · 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; the map shows only the 5 openly licensed ones, which alone would put the marker 6 km away. 5 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. 6 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

Trimezia fosteriana, photograph 1did not load

Photographs: SATELIT BM, CC BY-SA 4.0, via Wikimedia Commons.

Other Trimezia 11 in the reference

Trimezia candida Trimezia candida White walking iris Photo: CC0, author not statedTrimezia coerulea Trimezia coerulea Iridaceae Photo: CC0, author not statedTrimezia gracilis Trimezia gracilis Iridaceae Photo: CC BY, Victor Farjalla Pontes Trimezia humilis Iridaceae Trimezia liebmannii Trimezia liebmannii Iridaceae Photo: CC BY, Pedro Henrique Maloso RamosTrimezia longifolia Trimezia longifolia Iridaceae Photo: CC BY, Morten RossTrimezia martinicensis Trimezia martinicensis Martinique trimezia Photo: CC BY, Guillaume DelaitreTrimezia northiana Trimezia northiana North's false flag Photo: CC0, author not statedTrimezia sabini Trimezia sabini Iridaceae Photo: CC BY, André Ribeiro CardosoTrimezia spathata Trimezia spathata Iridaceae Photo: CC BY, Carlos Otávio GussoniTrimezia steyermarkii Trimezia steyermarkii Yellow walking iris Photo: CC BY, Adam J. Searcy

Names & registers

GBIFPOWOIPNIWFOWikidataWikipediaiNaturalist

The record

Family
Iridaceae
Described by
Steyerm.
Native to
Venezuela
Wild records
6 in range · 5 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
Habitat climate climate nothing to reportasked 2026-10-226 in-range records, none placed to within 10 km
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 6 datasets via GBIF.org; each carries its own licence.

Cultifolio

Opening your plants…