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The US Department of Agricultures National Fungus Collections is one of the worlds largest mycological institutions, housing over one million species of fungal specimens. Amateur mycologist Maurice Burke Walterss fascinating collection of hand-colored photographs is also held there. Walterss collection reveals the often-solitary practice of foraging, the then-nascent science of mycology, and the USDAs evolving interest in documenting the nations fungi (over 10,000 named species are found in the US).
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