Largest mushroom

When you google world’s largest mushrooms you see the answer including all the underground stuff. But what is the mushroom that creates the largest above ground structure to distribute it’s spores?

Phellinus ellipsoideus, if you count crust fungi (I don’t) as mushrooms.

If only mushroom-shaped mushrooms, perhaps Termitomyces titanicus or Phlebopus marginatus, depending on exactly how “largest” is defined.


I guess they don’t give “mush room” for other mushrooms then (goodbye).


Thank you!

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There’s also Calvatia gigantea, which can be huge!

This is what I was thinking. Up to 23 kg (50 pounds) and 2.6+ meters (8 feet) across. As a fruiting body this has to be a contender for the largest.


2.6+ meters (8 feet) across.

That article says that that was circumference, not diameter - quick math assuming approximate circle-shape puts that at 0.85 meters across (they say diameter in the text of picture 3 but that clearly doesn’t match the scale of the people next to it).

Another probable contender as have been mentioned may be Phlebopus marginatus. The 2021 spring issue of the bulletin of the Danish Mycological Society mentions it as a curiosity (it grows in East Asia and Australia) and says that each year specimens measuring 50-60 cm across and weighing >20 kg are found and that the unverified world record is about a meter across and weights upwards of 30 kg.

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millions of years ago, there was Prototaxites, although evidence suggests it could have been a lichen rather than a pure fungus.


I watched a video about these. Really cool.

From what I know, even Calvatia can be huge.