Gymnopilus subtropicus

G. subtropicus produces medium-sized mushrooms with yellow, fibrillose caps 1.4-4.5 cm broad. The gills are crowded, broad, adnate-decurrent. The stipe is 3.5-4 cm long by 3-5 mm thick, enlarged at the base, and yellowish above and brownish below. It has a cobweb-like partial veil when young, often remaining on the stipe, forming a ring. Microscopically, it has ellipsoid spores measuring 5.5-7 x 4-4.5 μm that are dextrinoid. Gymnopilus subtropicus can be identified by several distinctive features including yellow cap scales, dextrinoid spores, interwoven cap tissue, and caulocystidia.

G. subtropicus grows on oak and palm logs in subtropical forests across Florida, Mississippi, Louisiana, and Hawaii, fruiting from March to August (Hesler 1969).

Some Gymnopilus species have psychoactive properties, but the biochemistry of G. subtropicus is unknown. It contributes to decomposition in its native ecosystems.