ABSTRACT: The anamorph of Erysiphe hylomeci has not yet been recorded and that of E. urticae has been insufficiently known. Conidia, conidiophores, hyphae, appressoria, germination of conidia and other characters of taxonomic value are described and illustrated.

KEYWORDS: Hylomecon, Urtica, powdery mildew, Erysiphaceae

NOMENCLATURAL NOVELTIES:
None.