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What was rediscovered?
Ptilotus senarius is a slender shrub in the amaranth family, Amaranthaceae. Queensland Herbarium botanist Anthony R. Bean formally described it in 2014, after recognizing it as a distinct taxon in 2008. The Australian Journal of Botany paper describes the shrub as growing up to 60 cm tall. Australian Journal of Botany
Before the rediscovery, the species was known from two collections in the Gilbert River region of northern Queensland: one made in June 1925 on “grassy hills,” and another in May 1967 in “tea tree [Melaleuca] forest.” No collection had been made since 1967.
How was the plant found?
A photograph brought it to an expert’s attention
In June 2025, horticulturalist and bird bander Aaron Bean photographed plants while working on private property in the Gilbert River region and uploaded the images to iNaturalist. Anthony R. Bean, who had described the species, recognized the record as likely Ptilotus senarius. The rediscovery documented in the Australian Journal of Botany came 58 years after the last collection.
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A specimen confirmed the identification
Photographs provided the lead, but they were not the final confirmation. On 7 July 2025, a specimen was collected, identified by Anthony R. Bean, and deposited at the Queensland Herbarium. The paper reports 15 individual plants within an area of about 15 metres in radius. The researchers withheld the precise locality because it is on private property. Australian Journal of Botany paper
Was it really extinct?
No evidence established that Ptilotus senarius had become globally extinct. It had not been collected for decades, and unsuccessful targeted searches between 2008 and 2014 contributed to its being treated as presumed extinct or extinct in the wild. The distinction matters: the 2025 finding is a confirmed rediscovery of a species missing from collections, not proof that it returned after proven extinction.
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The Queensland Flora and Fungi Census 2024 changed its Nature Conservation Act 1992 status from “Extinct in the wild” to “Critically Endangered,” as reported in the 2026 paper. The paper also notes that less than 50% of potential habitat had been surveyed. Earlier searches, including during the months when historical specimens were collected, did not find the plant.
Does the rediscovery mean the species is safe?
No. The evidence establishes one observed population at a single private-property locality, not the species’ full range, population trend, or long-term viability. The 15 plants reported at the site are a limited observation, not a comprehensive population estimate. The paper also identifies cattle grazing as a concern, noting that Ptilotus species are sensitive to grazing pressure.
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What role did iNaturalist play?
iNaturalist connected an observation to a botanist able to recognize a rare species. The paper highlights how citizen observations can document plants in places professional surveys may not reach, make records available quickly, and draw on a wider network of expert identifiers. In this case, quick review helped prompt collection while fertile material was present.
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The platform did not, by itself, establish the rediscovery. The authors stress that photographs can initiate investigation, while physical specimen confirmation is needed to confirm a rediscovery. Here, expert recognition and a deposited herbarium specimen completed that chain.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Why the exact location is not public
The population is on private property, and the researchers have withheld its precise locality. There is no public access route established in the paper, and readers should not treat the report as an invitation to look for or visit the plants. Protecting a small, vulnerable population is more important than publishing directions to it.
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