It was formally described as new to science in 2010, based on specimens found growing in a greenhouse in Botanischer Garten Jena, in Germany.
[3] This infrageneric grouping of species is characterized by stipes that are either absent or laterally attached to the cap, and pleurocystidia (cystidia on the gill face) lacking brightly colored pigments.
[4] The fruit bodies of C. byssisedoides are pleurotoid (referring to gilled mushrooms with off-center stipes that grow on wood), and attached to its substrate with distinct rhizomorphs.
The caps attain diameters of up to 20 mm (0.8 in) The color is grayish and the surface smooth and hygrophanous, and partially translucent, so that the outlines of the gills can be seen.
[4] Clitopilus byssisedoides was found growing on decayed wood in pot with Phalaenopsis (Orchidaceae) in a tropical hothouse in the Jena Botanical Garden.