Erysiphe fimbriata sp. nov.: A powdery mildew fungus found on Carpinus laxiflora

Abstract

Ascomata of a powdery mildew-like fungus have been found on Carpinus laxiflora in Tochigi Prefecture of Japan since 2003. The morphological and molecular characteristics of this fungus are reported, and a new species, Erysiphe fimbriata, is proposed. It has large chasmothecia (200-250 μm in diameter) with long (up to 4-5 mm in length), fimbriate appendages arising from the upper half of the chasmothecia and turning upward, and numerous asci (22-38 per chasmothecium). Erysiphe fimbriata is a unique fungus both genetically and morphologically. © 2008 The Mycological Society of Japan and Springer.