- Technically, a mushroom is the “fruiting body” of a fungus—its reproductive organ. Think of
mushrooms as the apples on a tree that grows entirely underground. Most of the fungal organism
exists belowground, in the form of mycelia—the typically white cobwebby single-cell-wide
filaments that extend through the soil. But because it is hard to observe and study these delicate
subterranean structures—they can’t be unearthed without breaking—we tend to focus on the
mushrooms we can see, even though they are just the tip of a kind of fungal iceberg.
frankie
(Frankie)
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