Lepiota atrodisca, commonly known as the dusky parasol,Siegel, Noah; Schwarz, Christian (September 1, 2024). Mushrooms of Cascadia: A Comprehensive Guide to Fungi of the Pacific Northwest. Humboldt County, CA: Backcountry Press. p. 68. . is a species of mushroom in the genus Lepiota. It is found in North America, South America,In Klinkenberg, Brian. (Editor) 2020. E-Flora BC: Electronic Atlas of the Plants of British Columbia. Lab for Advanced Spatial Analysis, Department of Geography, University of British Columbia, Vancouver. [Accessed: 2025-06-18 10:53:56 AM ] and India. Its edibility is unknown, but similar species are known to be deadly toxic.
Taxonomy Lepiota atrodisca was first described by Stanford Myron Zeller in 1938. DNA analysis has shown that L. atrodisca could actually be multiple species, only distinguishable through genetic sequencing.
Description The cap of Lepiota atrodisca is 1.5-5 centimeters in diameter, and has a dark-colored disc in the middle. The stipe is about 2–8.5 centimeters tall and 1-4 millimeters wide, and the gills are white.
Habitat and ecology Lepiota atrodisca grows in leaf litter in forests, and is common in low-lying areas in the Pacific Northwest. While it occasionally fruits during the summer and winter, it usually does so in the fall, shortly after it rains.
References