Photograph by R. E. Halling ©, 1996
The overall appearance of this undescribed agaric is almost reminiscent of R. butyracea. The basidiospores are pink tinted in deposit and are dextrinoid and cyanophilous. The Costa Rican entity begins with a dark brown pileus, but that color soon fades, and the crowded lamellae become serrate to eroded. Also, the slender stipe is deeply radicating in litter and is always characteristically white and abruptly bent and/or contorted at the base (see below). It is widespread in the Talamancas and can be locally abundant.