Gymnopus foliiphilus var. costaricensis. A Basidiomata and rhizomorphs B Pileus underside showing lamellar spacing C Pleurocystidia D Basidia E Pileipellis hyphae, showing encrustation and lobose side-branches F Basidiospores. Standard bars: A = 5 mm; B = not to scale; C–E = 20 µm; F = 5 µm. TFB 9750.