1) Fungus order 2) Order erysiphales 
== Systematics == The order contains one family (Erysiphaceae), 28 genera and approximately 100 species. Many imperfect fungi (fungi whose sexual reproduction is unknown) belong here, especially the genus Oidium. Recent molecular data have revealed the existence of six main evolutionary lineages. Clade 1 consists of Erysiphe, Microsphaera, and Unc...
[n] - saprophytic and parasitic fungi that live on plants
order Erysiphales noun saprophytic and parasitic fungi that live on plants