PYRENOMYCETIDAE (or Hymenomycetidae--the Pyrenomycetes): asci borne in a layer; ascocarp a cleistothecium or a perithecium; contains Chaetomiales, Clavicipitales, Coronophorales, Diaportheales, Erysiphales, Hypocreales, Phyllachorales, Sordariales, and Xylariales

• Hypocreales: ascus unitunicate, inamyloid; stroma or subiculum present; perithecia are light colored
  • three families: Hypocreaceae, Hypomycetaceae, Nectriaceae

• Nectriaceae: bright-colored ascoma superficial on stroma or without stroma.

reddish ascoma(perithecia) stroma absent	reddish ascoma superficial on stroma
Nectria sp.	Nectria sp.

classification system (places icons into orders)

index to genera/species