Ganoderma leucocontextum, a new member of the G. lucidum complex from southwestern China

•Ganoderma leucocontextum is described as a new species of Ganoderma from southwestern China.•The new species is characterized by white context and the habitat on deciduous wood.•A molecular phylogeny indicated that this fungus is in its own clade within Ganoderma.

Ganoderma leucocontextum was described from Tibet Autonomous Region and Sichuan Province of China. The new species was characterized by red brown to purplish or blackish red brown pileus, white to cream pore surface, white context, thickset stipe, broadly ellipsoid basidiospores (9.5–12.5 × 7–9 μm) with coarse echinulae, and the mostly regular cuticle hyphae. Ganoderma leucocontextum was known only grow on deciduous wood and closely related to the G. lucidum complex.