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Parasitic on Boletaceae. Found under Tsuga, Acer, and Betula. 8-12 cm. Subiculum white, powdery, fluffy, turning yellow with age, covering pileus, stipe, and hymenium on fully colonized specimens. Inner flesh soft, occasionally displaying guttation. Most host specimens unrecognizable with the exception of one partially colonized Leccinum spp. (pictured). There are 10 recognized species of Boleticolous Hypomyces. The bright yellow coloration of older specimens is consistent with descriptions of H. chrysospermus, but microscopic analysis is required for confirmation of ID (Rogerson and Samuels 1994). H. chrysospermus is the telemorphic stage of this unusual ascomycete, while the anamorphic stage is Sepedonium chrysospermus (Rogerson and Samuels 1989). This distinction represents a vestige of dual nomenclature within mycology (Hawksworth 2011). ID number:


Location: East Brook Valley, Walton, NY (TC - Tsuga Creek, BR - Betula Ridge)

Hypomyces chrysospermus