Morphological diversity of Acremonium sclerotigenum/egyptiacum plus a comparison with an illustration of the original Acremonium potronii. (A–E) ×1000, (F) ×400. Blue structures stained in lactic-acid-cotton-blue stain, reddish in lactofuchsin: (A) CBS 545.89, catenate-conidial isolate originally identified as A. alternatum; (B) CBS 545.89 sclerotia; (C) CBS 251.95 mucoid-conidial isolate with ellipsoidal conidia, originally identified as A. potronii; (D) original Vuillemin drawing of A. potronii; (E) CBS 113276, typical mucoid-conidial A. sclerotigenum isolate with cylindrical conidia; and (F) heavily sclerotial Iranian isolate Zare 60-#3.