Genus Melampsora is a group of fungi that causes rust diseases in various plants. It is important to know the synonyms for Genus Melampsora as it will facilitate communication among researchers and plant pathologists. Some common synonyms for Genus Melampsora include Rust fungi, Pucciniastrum, Cronartium, Gymnosporangium, and Endocronartium. Rust fungi is a general term for all fungi that cause rust diseases in plants. Pucciniastrum is a rust fungus that affects conifers and is commonly known as the white-pine blister rust. Cronartium is another rust fungus that affects pines and other conifers. Gymnosporangium affects fruit trees and junipers. Finally, Endocronartium is a rust fungus that typically affects pines and spruces.