Cleistothecia of genera Podosphaera contain a single ascus and have flattened, dichotomously branched appendages.
 
 
 
 

Representative Species

Podospherica leucotricha

causes powdery mildew disease of apple, pear, and quince

Podospherica oxyacanthae

causes powdery mildew disease of apricot, cherry, peach and plum