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Happy #MycologyMonday! Christiaan Hendrik Persoon (1761-1836) has been called the "father of systematic mycology." One of his early works, "Observationes Mycologicæ" (1796-99), is available in #BHLib via @NHM_Library — it includes a letter from Persoon! https://t.co/GVvvwVwu1p