A plant discovered growing in the middle of a woman’s lawn in Moreton Bay, Queensland, has become a warning to Australian gardeners. The plant, with delicate leaves and soft pink flowers, caught the woman’s attention, prompting her to seek help online. “I haven’t got a clue what it is,” she posted, noting that it closes its leaves when touched.
While its appearance may be appealing, the plant is, in fact, a harmful invasive species. Known as *Mimosa pudica* or the sensitive plant, it is recognized for its ability to fold its leaves when disturbed or at night. Dr. Carol Booth, principal policy analyst at the Invasive Species Council, explained that the plant, once likely introduced as a garden ornamental, is now a significant problem.
The sensitive plant is a common pest in coastal regions of north and central Queensland and has also been reported in parts of New South Wales and near Darwin. Although it has not been declared a national weed of concern, it is considered a pest in Western Australia and the Northern Territory.
This species, which spreads through human or animal movement and via seeds in gravel, poses a threat to agriculture and conservation efforts. “It thrives in disturbed areas, creating dense ground cover that pushes out native plants,” Dr. Booth said. “It also changes soil properties and affects microbial communities, fostering conditions that allow it to spread further.”
The plant was originally introduced to Australia as a potential pasture for livestock, but Dr. Booth noted that it may be toxic to cattle. The Centre for Invasive Species Solutions has warned that the plant could poison livestock, though it is generally not harmful to people or pets, except in some cases causing skin irritations.
To control its spread, the Queensland government advises property owners to manage invasive plants, with herbicide being the most common method. Online, local gardeners have shared their experiences. “Don’t mow over it or you’ll have it everywhere,” one advised, suggesting pulling it out by the roots while wearing gloves. Another gardener shared their frustration: “I regularly monitor our acre property for clumps of it. Then it’s out with heavy-duty gloves and a long screwdriver to dig it out.”
The sensitive plant may look harmless, but its spread is a growing concern for gardeners and farmers across the country.
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