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What can we learn from the world's largest parasitic plant?

  • 1.  What can we learn from the world's largest parasitic plant?

    Posted 30-05-2023 10:30

    'WA's Christmas tree': what mungee, the world's largest mistletoe, can teach us about treading lightly
    The Conversation, Alison Lullfitz, Jessikah Woods, Lynette Knapp, Shandell Cummings, Stephen D. Hopper

    Noongar Country of southwestern Australia is home to the world's largest parasitic plant, a mighty mistletoe that blooms every December. That's why it's commonly known as WA's Christmas Tree. But it also goes by other names, mungee and moodjar. And it holds great significance for Noongar people including the Merningar people of the south coast.

    While the unique biology and charisma of the species (Nuytsia floribunda) has been recognised by Traditional Owners for millennia, such rich Indigenous knowledge is barely known to Western science. Our research team includes three generations of Merningar alongside non-Indigenous scientists. In our new research, we set out to explore mungee's physiology, ecology and evolution from both Indigenous and Western science perspectives.

    The plant's ability to access a wide array of resources is remarkable, enabling it to prosper in the hostile, infertile, but biologically rich landscapes of southwestern Australia. This is also the case for Noongar people, whose traditional diet reflects the biological richness of their Country.

    Mungee is a revered teacher to Noongar people, with lessons for us all about living sustainably and in harmony with one another. 

    Three generations of the Merningar Knapp family have contributed to this research: (left to right) Harrison Rodd-Knapp, Jessikah Woods, her grandmother Lynette Knapp and mother Shandell Cummings, with flowering mungee near Waychinicup, on Merningar Country. Alison Lullfitz, Author provided

    A sand-loving parasite

    Nuytsia floribunda is widespread across Noongar Country (Boodja) and known to most Noongar as moodjar. But it's also called mungee by Merningar and other southern Noongar groups. Being mostly Merningar, we call it mungee and use that term here.

    Mungee is a mistletoe tree that grows up to 10m tall in sandy soils. It's endemic to southwestern Australia, but widespread throughout. The parasitic capability of the plant comes from highly modified, ring-shaped roots (haustoria) that act like secateurs to mine other plants for water and nutrients.

    We used "two way science" (cross-cultural ecology) methods – including a literature review, shared recording of visits on Country, and an author workshop – to investigate mungee more thoroughly than would be possible through Western science alone. 

    A revered teacher offering divine guidance

    Like other Indigenous Australian knowledge systems, Merningar lore is place-based. It inextricably links people, specific places, other organisms and non-living entities of Country. Mungee tells specific stories through where it lives, the plants it lives with, and when it flowers.

    The species is widely held as sacred among Noongar peoples. For Merningar, it has the highest status of all plants. Mungee holds important lore about how we as humans relate to each other and with the world around us, similar to a cornerstone religious text such as the Christian Bible.

    For Merningar, mungee is a powerful medium that helps restless spirits move on to the afterlife, known to us as Kuuranup. This enables those of us still living to be untroubled by their presence.

    Senior elder Lynette describes mungee as her teacher, providing guidance on how to exist in Merningar Boodja. The annual summer flowers represent her ancestors returning to their Country, reminding her to cherish and respect both her old people and her Boodja.

    Lynette calls the ring-shaped haustoria of mungee her "bush lolly". Under Merningar lore, digging for these sweet treats is not allowed when mungee is flowering. This is when bush lollies are scarce, so the rule is about living within seasonal constraints.

    The specialised ring-shaped haustorium of the mungee tree Nuytsia floribundataps into the resources of other plants. Mike Shayne

    An example of living sustainably

    Mungee primarily reproduces by cloning, sending out suckers up to 100m from the parent plant to produce identical copies. This results in patches of mungee clones gathered together in tight-knit populations.

    Continue reading on The Conversation


    Emily Mason
    Sydney NSW