That the Cattai might need some extra help was clear to Enhua Lee, a conservation ecologist within the Environment Department, who counted some 660 of the 4-5 metre trees in the wild with their leathery and lance-shaped leaves but found only mature individuals.

“Why are there no seedlings?” Dr Lee said. “We don’t know what stimulates natural germination.”

That the plant generates seeds is obvious enough. A visit by the Herald with Dr Douglas to the original tree he spotted found it producing seeds but there was no sign of any taking hold nearby.

A team at The Australian Botanic Garden at Mt Annan, led by Brett Summerell, stepped in to investigate the genetics of the Cattai between October 2018 and February 2019, and breed a variety of the plants.

These were then moved to a secret location in the national park starting last August, beginning with a batch of sixty plants with another sixty to come.

“We obtained a significant proportion of the total variety [of the Cattai],” Dr Summerell said. “We managed to get good genetic variability, which is not always the case.”

Out in the national park, each of the plantings is protected with a metal mesh, with most doing well despite signs of wallaby tastings. “They’re all looking good, although they have been chomped on a bit,” he said.

Dr Lee set the plants up at distances of at least eight metres in groups of six. “I’d noticed that they have this tendency to clump up, so I’m mimicking this natural feature,” she said.

Even though wet weather has been good, Dr Lee will still water the plants if they don’t receive at least 1 millimetre of rain over five days. Monitoring will last until at least 2026.

The decision to relocate the plant was prompted by the trees restricted range and the fact that most were on private land in one of Sydney’s fastest-growing development zones.

Researchers picked the new home in part because future predictions indicate it will still be suitable if conditions dry and heat up as expected.

Dr Summerell said similar calculations are being applied for other species being moved, such as the Hibbertia fumana, Rothbury Persoonia and some orchids.

“Most of these don’t necessarily have an explicit climate change perspective, but as the technology has developed we are starting to include the genomics and climate modelling in both the location selection and in the way in which plants are arranged to maximise genetic exchange,” he said.

Dr Douglas, who has identified at least five new species, said “there’s an absolute warehouse full of species likely to need translocation due to climate change”.

“Most of these will be at high elevations where there simply isn’t anywhere higher for them to move or even to be moved locally,” he said.

Those challenges, combined with current threats from habitat loss and invasive pests among others, mean that many more species are going to need interventions like those for the Cattai in the future.

“There needs to be recurrent funding – not just for five years...to recruit and retain staff with the appropriate skills,” Dr Douglas said. “You be losing things before they have got a name and even before they get [an endangered] listing.”