Rhizanthella is a remarkable orchid unlike any other—it spends its entire life underground. Without leaves and never breaking the soil’s surface, it survives by drawing nutrients from a symbiotic fungus that connects to the roots of the broom bush (Melaleuca uncinata).
The species first captured international attention in 1928 when a farmer in Western Australia discovered it while ploughing a field. Nearly a century later, it remains one of the world’s most elusive plants. Botanists searching for it must identify suitable habitat, then carefully remove layers of soil to uncover its tiny, reddish flowers encased in creamy-pink bracts. Despite living underground, the blooms emit a strong vanilla scent, and researchers believe they may be pollinated by termites or small flies.
There are five known species of Rhizanthella, all among the rarest orchids on Earth. With only a few surviving populations, they face a severe risk of extinction due to habitat loss and prolonged droughts linked to climate change.
At the University of Western Australia, botanist Kingsley Dixon is leading efforts to save the orchid. His team is cultivating the fungus alongside orchid seeds in laboratory conditions, then transplanting them into pots containing Melaleuca bushes. The hope is that this delicate approach will allow the hidden orchid to survive—and perhaps one day thrive again in its native soil.
