Microscopic features of Pulverulina flavoalba (FFAAS1039, holotype) A–E basidiospores F basidia G lamellae margin H lamellar trama I pileipellis J caulocystidia. Scale bars: 5 μm (A–E); 10 μm (F–J). Structures A–F were stained in 5% KOH aqueous solution and G–J with 1% Congo Red aqueous solution before photographing.