A genus of "gilled" boletes, Phylloporus spp. are frequently encountered in oak forests of Costa Rica. Species are most commonly seen along roadcuts. More often than not, they are infected with molds that deform the basidomata and prevent identification of the bolete. The Phylloporus illustrated is sometimes found without the parasite and can be distinguished by the red brown pileus, the white basal mycelium, and lack of isodiametric hyphae in the pileipellis. A complete description can be found in Brenesia 22: 169-171. 1984.