Photograph by R. E. Halling, © 1997
This mushroom has been reported from Africa, Asia, Europe, North and South America, and the Caribbean. According to A. E. Franco-M. (pers. com), there are several American collections that show differences in size of spores, size and shape of cheilocystidia, among other features. These entities may deserve recognition at varietal rank. The dark red pileus, ovoid to amygdaliform spores and lack of pleurocystidia will distinguish it from others in Costa Rica.