Boronias, known for their showy flowers and strong scent, are a quintessential part of the Australian bush. They led Traditional Owners to the best water sources and inspired Australian children’s author and illustrator May Gibbs to pen one of her earliest books, Boronia Babies.

But a weird group of boronias has puzzled botanists for decades. They have closed flowers that thwart most insect visitors. Those that do gain entry may encounter alternating sterile and fertile anthers (the male part that produces pollen) and sometimes, an enlarged stigma (the female part that receives pollen).

Since the early 1960s, scientists speculated this group of boronias relied on an “unusual agent for effective pollination”. Moths were occasionally mentioned in the botanical literature as potential pollinators, but the full story remained elusive – until now.

As my colleagues and I detail in our new research, moths are indeed the mystery pollinators of this strange group of flowers. This knowledge is crucial to ensuring their long-term survival.

My interest in the boronia pollinators began 15 years ago. I was studying a family of moths in my spare time,........

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