Since the first record of an anamorph of Neoerysiphe galeopsidis (syn. Erysiphe galeopsidis) on Lamium album subsp. barbatum in Korea in 1992, no scientific information has been added. Seven additional anamorphic samples (2003–2022) and one teleomorphic collection (November 2022) of N. galeopsidis on L. album subsp. barbatum in Korea enabled us to provide holomorph morphology and phylogeny of this powdery mildew for the first time. The presence of aerial hyphae around the chasmothecia was proposed and documented for the first time.
