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Metrosideros bartlettii; photograph Kahuroa, Public domain, via Wikimedia Commons Public domainKahuroa, Public domain, via Wikimedia Commons

Metrosideros bartlettii J.W.Dawson

Bartlett's rata

Myrtaceae · New Zealand North

No habitat climate
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Metrosideros bartlettii, photograph author not stated, no rights reservedMetrosideros bartlettii, photograph author not stated, no rights reservedMetrosideros bartlettii, photograph author not stated, no rights reservedMetrosideros bartlettii, photograph author not stated, no rights reservedMetrosideros bartlettii, photograph author not stated, no rights reservedMetrosideros bartlettii, photograph Kahuroa, Public domain, via Wikimedia Commons 17 photographs ›

Summary

Metrosideros bartlettii, commonly known as Bartlett's rātā, is a rare species of tree in the family Myrtaceae. It is endemic to the Northland Region in New Zealand's North Island. Bartlett's rātā reaches a height of up to 30 metres (100 feet) with a trunk of 1–1.5 metres (3 ft 3 in – 4 ft 11 in) in diameter. The species is classified in the subgenus Metrosideros and is known for its distinct whitish, paper-like bark and small white-coloured flowers. More on Wikipedia ›

Quoted from Wikipedia, "Metrosideros bartlettii", CC BY-SA 4.0.

About the genus · Metrosideros

Metrosideros is a genus of approximately 60 trees, shrubs, and vines in the family Myrtaceae, mostly found in the Pacific region. Most of the tree forms are small, but some are exceptionally large, the New Zealand species in particular. The name derives from the Ancient Greek metra or "heartwood" and sideron or "iron". More on Wikipedia ›

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

Cultivation

Nothing derived: no habitat climate for this species.

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. 27 of the 28 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.
NativeNew Zealand North · 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-34.488, 172.834 · in the densest population, 28 records (100% of those in range)
Kew's description“tree” · “subtropical” · quoted from WCVP, RBG Kew (CC BY 4.0); not derived here
Evidence usedThe map marker rests on all 28 georeferenced records inside the native range; the map shows only the 22 openly licensed ones, which alone would put the marker 1 km away. 1 record outside the WCVP native range not used. No climate across the range is derived for this species. 27 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 28 in-range records; it decides nothing. Records outside the native range, living specimens and records marked introduced are not used; which records count.

Photographs

Metrosideros bartlettii, photograph 1did not loadMetrosideros bartlettii, photograph 2did not loadMetrosideros bartlettii, photograph 3did not loadMetrosideros bartlettii, photograph 4did not loadMetrosideros bartlettii, photograph 5did not loadMetrosideros bartlettii, photograph 6did not load

Photographs: author not stated, no rights reserved · CC0 (5); Kahuroa, Public domain, via Wikimedia Commons.

Other Metrosideros 20 in the reference

Metrosideros albiflora Metrosideros albiflora White Flowering Rātā Photo: CC BY, Hannah Whittall Metrosideros angustifolia Myrtaceae Metrosideros carminea Metrosideros carminea Crimson rata Photo: CC BY, Chris ParminterMetrosideros colensoi Metrosideros colensoi Myrtaceae Photo: CC0, author not statedMetrosideros collina Metrosideros collina Vunga Photo: CC BY, Mike BowieMetrosideros diffusa Metrosideros diffusa Small ratavine Photo: CC BY, 大澤風季 ohsawa_FukiMetrosideros excelsa Metrosideros excelsa New Zealand Christmastree Photo: CC BY, Leon PerrieMetrosideros fulgens Metrosideros fulgens Scarlet rātā vine Photo: CC BY, Stephen HartleyMetrosideros kermadecensis Metrosideros kermadecensis Pohutukawa Photo: CC0, author not statedMetrosideros laurifolia Metrosideros laurifolia Myrtaceae Photo: CC BY, Rosario DouglasMetrosideros nervulosa Metrosideros nervulosa Mountain Rose Photo: CC BY, Leon PerrieMetrosideros operculata Metrosideros operculata Myrtaceae Photo: CC BY, Irisa Hudson all 21 ›

Names & registers

GBIFPOWOIPNIWFOWikidataWikipediaiNaturalist

The record

Family
Myrtaceae
Described by
J.W.Dawson
Native to
New Zealand North
Wild records
28 in range · 22 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; 6 records within 1 km of a botanic garden, herbarium or zoo left out (6 at a botanic garden or arboretum; 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 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 2026-10-22none 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
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 4 datasets via GBIF.org; each carries its own licence.

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